691 results on '"pharmaceutical wastewater"'
Search Results
2. Treating the wastes with wastes: Simple preparation of monolithic biomass-derived electrode for enhanced electro-Fenton treatment of pharmaceutical wastewater
- Author
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Dong, Pei, Huo, Kaixuan, Ma, Xiubiao, Ma, Xiaolin, Gu, Yingying, Lu, Mingjie, Zhang, Jinqiang, Wang, Yang, and Zhao, Chaocheng
- Published
- 2025
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3. Anaerobic dynamic membrane bioreactor treating sulfamethoxazole wastewater: advantages of dynamic membrane and its fouling mechanism
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Rao, Wenkai, Sun, Yuqi, Guo, Qingyang, Zhang, Jian, Zhang, Zhen, and Liang, Shuang
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- 2024
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4. Micro-nano bubble ozonation for effective treatment of ibuprofen-laden wastewater and enhanced anaerobic digestion performance
- Author
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Zhou, Sining, Qiao, Lei, Jia, Yanyan, Khanal, Samir Kumar, Sun, Lianpeng, and Lu, Hui
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- 2025
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5. UV irradiation enhanced removal of ammonia nitrogen and mineralization of typical organic pollutants of high-chlorine wastewater in catalytic ozonation
- Author
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An, Wenhui, Xiao, Siqi, Liu, Hongbo, and Ma, Luming
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- 2025
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- View/download PDF
6. Efficient removal of ciprofloxacin from pharmaceutical wastewater using advanced oxidation processes on doped perovskite La₀.₅A₀.₅CoO₃ (A = Sr, Ba and Ce) nanocatalysts
- Author
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Jalali, Mohammad Ali, Mousavi, Seyed Mahdi, and Setoodehkhah, Moslem
- Published
- 2025
- Full Text
- View/download PDF
7. Treatment of pharmaceutical wastewater by a sequential KMnO4/CoFe2O4-mediated catalytic ozonation process
- Author
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Bashardoust, Parnia, Giannakis, Stefanos, Dehghanifard, Emad, Kakavandi, Babak, and Dewil, Raf
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- 2024
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8. Global research trends in pharmaceutical wastewater from 1990 to 2023 using bibliometric analysis
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Wen, Guan, Wu, Huihao, Guo, Xiaoying, Gao, Yifei, Zhang, Chunfang, and Zhang, Wenjie
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- 2024
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9. Global trends in the research and development of medical/pharmaceutical wastewater treatment over the half-century
- Author
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Wang, Ling, Xu, Yixia, Qin, Tian, Wu, Mengting, Chen, Zhiqin, Zhang, Yalan, Liu, Wei, and Xie, Xianchuan
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- 2023
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10. Recent development on core-shell photo(electro)catalysts for elimination of organic compounds from pharmaceutical wastewater
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Balu, Surendar, Chuaicham, Chitiphon, Balakumar, Vellaichamy, Rajendran, Saravanan, Sasaki, Keiko, Sekar, Karthikeyan, and Maruthapillai, Arthanareeswari
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- 2022
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11. Integrated Ozone-Fenton Treatment - A Breakthrough in Pharmaceutical Wastewater Purification.
- Author
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Hardyanti, Nurandani, Zaman, Badrus, Pramesti, Ifta Anisa, William, Gabriel Stanley, and Purwono
- Subjects
OZONE & the environment ,PHARMACEUTICAL industry & the environment ,WASTEWATER treatment ,OXIDATION ,BIOCHEMICAL oxygen demand ,INDUSTRIAL applications - Abstract
The growing pharmaceutical industry has increased the production of wastewater containing pollutants that are resistant to conventional treatment. This study aimed to evaluate the effectiveness of an integrated advanced oxidation process (AOP) combining ozonation and Fenton oxidation for treating pharmaceutical wastewater. The objective was to determine whether this combined approach could achieve higher removal efficiencies for key pollutants, including turbidity, biochemical oxygen demand (BOD), chemical oxygen demand (COD), and total organic carbon (TOC), compared to individual processes. The research involved applying ozonation and Fenton oxidation, both separately and in combination, to wastewater samples. The study identified the optimal conditions for the integrated treatment by adjusting the concentrations of Fenton reagents and the duration of ozone exposure. The effectiveness of the treatment was assessed based on the removal efficiencies of turbidity, BOD, COD, and TOC. The results demonstrated that the combined ozone-Fenton process was highly effective, achieving removal efficiencies of 98.74% for turbidity, 96% for BOD, 99.56% for COD, and 96.63% for TOC. These findings highlight the potential of this combined AOP as a promising approach for improving the degradation of pollutants in pharmaceutical wastewater. However, the study's limitations include the need for further research to optimize the process for different wastewater types and to evaluate its long-term environmental impact and cost-effectiveness. The study's practical value lies in its potential industrial application, providing a more effective alternative to conventional treatment methods. The originality of the research is in systematically exploring the synergistic effects of combining ozonation and Fenton oxidation, contributing to advanced wastewater treatment development. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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- View/download PDF
12. Pretreatment of 3-hydroxyacetophenone in pharmaceutical wastewater using combined salting-out crystallization+ Fenton system and subsequent impact analysis of effluent water.
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Nong, Guoyou, Huang, Wenyu, Meng, Lijie, Gao, Yufan, Tian, Chengyue, Zhang, Xinyun, and Lu, Lihai
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WASTEWATER treatment ,SODIUM sulfate ,SEWAGE ,WATER analysis ,CRYSTALLIZATION - Abstract
Selecting a suitable pretreatment process for pharmaceutical wastewater that is difficult to treat biochemically so that it can enter the subsequent biochemical treatment. In this study, pharmaceutical wastewater consisting of 45 g/L sodium bisulfate, 9 g/L 3-hydroxyacetophenone (3-HAP), and 36.75 g/L sulfuric acids,which is a kind of typical pharmaceutical wastewater, was used for the pretreatment case study, and the process was screened by technology. A salting-out crystallization+Fenton system(SC-F) was developed for the treatment of this wastewater. The salting-out agent is formed by the pH adjustment process without additional additions and the salting-out crystallization effect is significant for the precipitation of 3-HAP from the wastewater. Subsequently, the optimal operating conditions for SC-F were derived from experiments as H
2 O2 of 0.4692 mol/L, n(H2 O2 ):n(Fe2+)=30:1, pH=3. Under optimal conditions, the reaction time of 2 h achieved a COD removal rate of 90% and a BOD/COD value of 0.56, confirming the effectiveness of the technology in treating this wastewater. Additionally, it was discovered that the Fenton treatment was not significantly impacted by the inorganic components of the effluent. Analysis of effluent properties and possible effects on subsequent treatment by LC-MS and toxicity analysis. The results show that the biodegradability are enhanced by the pretreatment technology. However, the effluent still suffers from high acidity and high salt content, and this study proposes a solution to this problem. Furthermore, research on the treatment of 3-HAP wastewater has not been reported and this study provides a new case study in the field of wastewater treatment. [ABSTRACT FROM AUTHOR]- Published
- 2024
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13. Optimization of Heavy Metals Removal Through Pecan Shell-Based Modified Activated Carbon from Pharmaceutical Wastewater and Evaluation of the Treated Effluent for Irrigating Pisum sativum.
- Author
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Khurshid, Konain, Nawaz, Rab, Khalid, Azeem, Mahmood, Shahid, Qadeer, Samia, Hanafiah, Marlia Mohd, and Anjum, Muzammil
- Abstract
The simultaneous presence of pharmaceuticals and heavy metals (HMs) in wastewater generated by the pharmaceutical industries may result in a variety of environmental concerns. For that reason, it is necessary to remove HMs and pharmaceuticals before releasing industrial effluent in the environment. The aim of this work was to develop an improved and optimized adsorption process employing modified activated carbon (MAC) to remove HMs from pharmaceutical wastewater and evaluate the suitability of the treated effluent for irrigation purposes. Pecan shells were used to produce the activated carbon (AC), which was then modified with FeCl
2 and FeCl3 . The modified activated carbon (MAC) was characterized using various analytical techniques including Scanning Electron Microscopy (SEM), Energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Vibrating Sample Magnetometry (VSM) and Brunauer–Emmett–Teller (BET). The response surface method (RSM) with central composite design (CCD) was used to optimize the conditions of the adsorption process for the removal of HMs from pharmaceutical wastewater (PWW). To test its impact on plant growth parameters and germination, two distinct pea plant (Pisum sativum) varieties (Climax and P-2009) were irrigated with treated effluent. The results revealed that the MAC performed excellently under the optimized condition of a MAC dose of 0.6 g/L, pH 11, contact time of 65 min, and temperature of 35 °C, removing more than 90% of the selected HMs (Pb, Cd, and Cu) from PWW. The elimination of HMs from pharmaceutical effluent reduces its toxicity, as evidenced by the greater germination percentage and germination index for P. sativum irrigated with treated wastewater as opposed to untreated wastewater. In addition, the P. sativum irrigated with treated wastewater exhibited significantly improved outcomes from the untreated wastewater in terms of plant growth indicators such as biomass, number of leaves, leaf area, number of branches, and length of roots and shoots.Highlights: Pecan shell-based magnetic activated carbon (MAC) was prepared that efficiently removed more than 90% of the Pb, Cd, and Cu from pharmaceutical wastewater. The RSM improved adsorption parameters, increasing the effectiveness of heavy metal removal from pharmaceutical wastewater. The optimum parameters for heavy metals removal were a MAC dose = 0.6 g/L, pH= 11, contact period = 65 min, and temperature of 35 °C. Due to reduced metals toxicity, the treated wastewater improved Pisum sativum growth as compared to the plants irrigated with untreated wastewater. [ABSTRACT FROM AUTHOR]- Published
- 2025
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14. Performance Comparison of Hollow Fiber Membrane Contactors for Liquid-Liquid Extraction of Penicillin-G from Wastewater
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Farzaneh Abbasisourki, Amir Mansourizadeh, and Mohammad Hossein Jazebizadeh
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membrane contactor ,pharmaceutical wastewater ,penicillin g ,response surface methodology ,Environmental sciences ,GE1-350 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Pharmaceutical waste is one of the considerable problems of the environment. Membrane contactors are used to treat various of wastewater. This study compared the effectiveness of polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) and polysulfone (PSF) membrane contactors in separating antibiotics from pharmaceutical wastewater. For this purpose, PVDF-HFP hollow fiber membranes were prepared using the non-solvent phase separation (NIPS) method. Hollow fiber membranes were characterized. Penicillin G was extracted from pharmaceutical wastewater with a liquid-liquid membrane contacting system. Optimizing the operational variables of penicillin G extraction was done using the response surface method. The results showed that the PVDF-HFP membrane has an open structure with large finger-like cavities, fragile outer skin, and an inner skinless layer. This membrane has an average surface pore size, total porosity, and water contact angle of 0.04 µm, 84%, and 94°, respectively. PVDF-HFP membrane showed the maximum penicillin G extraction flux of 1.54 × 10-3 kg/m2s in the optimal operating conditions of aqueous phase flow rate of 51 ml/min and organic phase flow rate of 144 ml/min. By comparing the characteristics and using the response surface method, it was determined that the PVDF-HFP membrane contactor has a higher extraction flux than PSF in separating penicillin G from pharmaceutical wastewater.
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- 2024
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15. Removal of oxytetracycline from pharmaceutical wastewater using kappa carrageenan hydrogel
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Muhammad Afzaal, Rab Nawaz, Saddam Hussain, Mahnoor Nadeem, Muhammad Atif Irshad, Ali Irfan, Hafiz Abdul Mannan, Aamal A. Al-Mutairi, Atif Islam, Sami A. Al-Hussain, Mehwish Rubab, and Magdi E. A. Zaki
- Subjects
Oxytetracycline ,Kappa Carrageenan ,Hydrogel ,Bentonite nano-clay ,Pharmaceutical wastewater ,Medicine ,Science - Abstract
Abstract This study investigated the adsorption of Oxytetracycline (OTC) from pharmaceutical wastewater using a kappa carrageenan based hydrogel (KPB). The aim of the present study was to explore the potential of KPB for long-term pharmaceutical wastewater treatment. A sustainable adsorbent was developed to address oxytetracycline (OTC) contamination. The hydrogel’s structural and adsorption characteristics were examined using various techniques like Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), X-ray powder diffraction (XRD), and kinetic models. The results revealed considerable changes in the vibrational modes and adsorption bands of the hydrogel, suggesting the effective functionalization of Bentonite nano-clay. Kappa carrageenan based hydrogel achieved the maximum removal (98.5%) of OTC at concerntration of 40 mg/L, pH 8, cotact time of 140 min and adsorbent dose of 0.1 g (KPB-3). Adsorption of OTC increased up to 99% with increasing initial concentrations. The study achieved 95% adsorption capacity for OTC using a KPB film at a concentration of 20 mg/L and a 0.1 g adsorbent dose within 60 min. It also revealed that chemisorptions processes outperform physical adsorption. The Pseudo-Second-Order model, which emphasized the importance of chemical adsorption in the removal process, is better suited to represent the adsorption behavior. Excellent matches were found that R2 = 0.99 for KPB-3, R2 = 0.984 for KPB-2 and R2 = 0.989 for KPB-1 indicated strong chemical bonding interactions. Statisctical analysis (ANOVA) was performed using SPSS (version 25) and it was found that pH and concentration had significant influence on OTC adsorption by the hydrogel, with p-values less than 0.05. The study identified that a Kappa carrageenan-based hydrogel with bentonite nano-clay and polyvinyl alcohol (PVA) can efficiently remove OTC from pharmaceutical effluent, with a p-value of 0.054, but weak positive linear associations with pH, temperature, and contact time. This research contributed to sustainable wastewater treatment and environmental engineering.
- Published
- 2024
- Full Text
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16. Wastewater Treatment of Fluoxetine Unit of Aria Pharmaceuticals Using Catalytic Ozonation Process: Experimental Study and Optimization
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Abbas Aghaeinejad Meybodi, Amanollah Ebadi, and Amin Alamdari
- Subjects
pharmaceutical wastewater ,fluoxetine ,ozone ,central composite design ,catalyst ,cod ,Technology ,Water supply for domestic and industrial purposes ,TD201-500 ,Sewage collection and disposal systems. Sewerage ,TD511-780 - Abstract
Discharge of pharmaceutical wastewater into surface and underground water has harmful effects on human health and living organisms, even in low concentrations. For this reason, pharmaceutical wastewater treatment is very important. In this research, wastewater treatment of Aria Pharmaceutical's Fluoxetine production unit was studied using γ-alumina catalysts. The catalyst was synthesized using the co-precipitation method and characterized by XRD, FTIR, FESEM, EDX, and BET methods. In the synthesis of γ-alumina catalyst, aluminum nitrate was used as a precursor, and sodium carbonate was used as the precipitating agent. The central composite design method was used to design experiments and to model and optimize the wastewater treatment using catalytic ozonation. In addition, the effect of the operating parameters on the catalytic ozonation process of Fluoxetine-containing wastewater, including the inlet ozone concentration, the amount of the catalyst, and reaction time, were investigated. Based on the obtained results, a significant agreement was observed between the experimental data of COD removal for wastewater and the values predicted by the CCD method. The results of the Pareto analysis showed that among the studied operational parameters, the reaction time, the amount of catalyst, and the initial concentration of ozone are the most effective parameters on the COD removal with percentages of 35.58%, 34.64% and 10.87%, respectively. Finally, by optimizing the process, the maximum value of COD removal of 92.13% was obtained experimentally for pharmaceutical wastewater using catalytic ozonation process in the reaction time of 30 min, the amount of catalyst of 1 g/L and the ozone concentration of 30 mg/L as optimal conditions.
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- 2024
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17. PREPARATION AND CHARACTERIZATION OF ZINC CROSSLINKED CHITOSAN MEMBRANE AS AN EFFECTIVE ADSORPTION MATERIAL FOR AMOXICILLIN IN PHARMACEUTICAL WASTEWATER.
- Author
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Hastuti, Budi, Isnaini, Rizki Nur, Hadi, Saptono, and Kamari, Azlan
- Subjects
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ADSORPTION capacity , *CHITOSAN , *X-ray diffraction , *AMOXICILLIN , *SEWAGE - Abstract
This study aims to synthesize a zinc crosslinked chitosan (Chi/Zn) membrane as an adsorbent for amoxicillin in pharmaceutical wastewater. The Chi/Zn membranes were prepared over 14 hours at 50 °C with varying chitosan and zinc concentrations. FTIR analysis confirmed successful crosslinking by identifying hydroxyl (O-H), carbonyl (C-O), and amine groups (NH2), along with N-Zn and O-Zn interactions. XRD analysis indicated an amorphous structure, while SEM revealed rough, uneven surfaces. The highest adsorption capacity of a chitosan membrane occurs at a concentration of 60 mg/L. At this concentration, the pure chitosan membrane's adsorption effectiveness and capacity are 42.2% and 42.2 mg/L, respectively. The Chi/Zn membrane adsorbed amoxicillin with an adsorption efficiency of 58.86% with an adsorption capacity of 58.86 mg/g. Thus, it can be said that the chitosan/Zn membrane is quite effective in being applied as an amoxicillin adsorbent in pharmaceutical waste. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
18. Potassium permanganate–modified eggshell biosorbent for the removal of diclofenac from liquid environment: adsorption performance, isotherm, kinetic, and thermodynamic analyses.
- Author
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Adeyi, Abel A., Ogundola, Damilola O., Popoola, Lekan T., Bernard, Esther, Udeagbara, Stephen G., Ogunyemi, Adebayo T., Olateju, Idowu I., and Zainul, Rahadian
- Subjects
ADSORPTION isotherms ,ELECTROSTATIC interaction ,DIFFUSION control ,HYDROGEN bonding ,X-ray diffraction - Abstract
This study assess how well diclofenac (DCF) can be separated from aqueous solution using potassium permanganate–modified eggshell biosorbent (MEB). The MEB produced was characterised using XRD, FTIR, and SEM. Batch experiments were conducted to examine and assess the impact of contact time, adsorbent dosage, initial concentration, and temperature on the adsorption capacity of the MEB in the DCF sequestration. The best parameters to obtained 95.64% DCF removal from liquid environment were 0.05 g MEB weight, 50 mg/L initial concentration, and 60 min contact time at room temperature. The maximum DCF sequestration capacity was found to be 159.57 mg/g with 0.05 g of MEB at 298 K. The adsorption isotherm data were more accurately predicted by the Freundlich model, indicating a process of heterogeneous multilayer adsorption. The results of the kinetic study indicated that the pseudo-second-order kinetic models best matched the experimental data. The findings revealed that the dynamic of DCF entrapment is largely chemisorption and diffusion controlled. Based on the values of thermodynamic parameters, the process is both spontaneous and endothermic. The primary processes of DCF sorption mechanism onto the MEB were chemical surface complexation, hydrogen bonding, π‐π stacking, and electrostatic interactions. The produced MEB showed effective DCF separation from the aqueous solution and continued to have maximal adsorption capability even after five regeneration cycles. These findings suggest that MEB could be highly efficient adsorbent for the removal of DCF from pharmaceutical wastewater. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
19. Removal of oxytetracycline from pharmaceutical wastewater using kappa carrageenan hydrogel.
- Author
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Afzaal, Muhammad, Nawaz, Rab, Hussain, Saddam, Nadeem, Mahnoor, Irshad, Muhammad Atif, Irfan, Ali, Mannan, Hafiz Abdul, Al-Mutairi, Aamal A., Islam, Atif, Al-Hussain, Sami A., Rubab, Mehwish, and Zaki, Magdi E. A.
- Subjects
- *
CARRAGEENANS , *HYDROGELS , *SUSTAINABILITY , *ADSORPTION (Chemistry) , *OXYTETRACYCLINE , *X-ray powder diffraction , *ACRYLIC acid - Abstract
This study investigated the adsorption of Oxytetracycline (OTC) from pharmaceutical wastewater using a kappa carrageenan based hydrogel (KPB). The aim of the present study was to explore the potential of KPB for long-term pharmaceutical wastewater treatment. A sustainable adsorbent was developed to address oxytetracycline (OTC) contamination. The hydrogel's structural and adsorption characteristics were examined using various techniques like Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), X-ray powder diffraction (XRD), and kinetic models. The results revealed considerable changes in the vibrational modes and adsorption bands of the hydrogel, suggesting the effective functionalization of Bentonite nano-clay. Kappa carrageenan based hydrogel achieved the maximum removal (98.5%) of OTC at concerntration of 40 mg/L, pH 8, cotact time of 140 min and adsorbent dose of 0.1 g (KPB-3). Adsorption of OTC increased up to 99% with increasing initial concentrations. The study achieved 95% adsorption capacity for OTC using a KPB film at a concentration of 20 mg/L and a 0.1 g adsorbent dose within 60 min. It also revealed that chemisorptions processes outperform physical adsorption. The Pseudo-Second-Order model, which emphasized the importance of chemical adsorption in the removal process, is better suited to represent the adsorption behavior. Excellent matches were found that R2 = 0.99 for KPB-3, R2 = 0.984 for KPB-2 and R2 = 0.989 for KPB-1 indicated strong chemical bonding interactions. Statisctical analysis (ANOVA) was performed using SPSS (version 25) and it was found that pH and concentration had significant influence on OTC adsorption by the hydrogel, with p-values less than 0.05. The study identified that a Kappa carrageenan-based hydrogel with bentonite nano-clay and polyvinyl alcohol (PVA) can efficiently remove OTC from pharmaceutical effluent, with a p-value of 0.054, but weak positive linear associations with pH, temperature, and contact time. This research contributed to sustainable wastewater treatment and environmental engineering. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
20. Research progress in the treatment of pharmaceutical wastewater by photocatalytic oxidation.
- Author
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LI Junsheng, LI Sihang, LI Jiahui, TAN Chong, ZUO Jinlong, and XIA Zhi
- Subjects
- *
PHOTOCATALYTIC oxidation , *WASTEWATER treatment , *COMPOSITE membranes (Chemistry) , *PHOTOCATALYSTS , *SEWAGE - Abstract
The current status of employing photocatalytic oxidation techniques for the purification of pharmaceutical wastewater is comprehensively reviewed. Emphasis is particularly placed on the application of semiconductor photocatalysts and photocatalytic composite membranes. Additionally, the integration of associated technologies with photocatalytic oxidation for the treatment of pharmaceutical wastewater is profoundly discussed. The article elaborates on the efficiency of various techniques towards the purification of pharmaceutical wastewater, highlighting their respective advantages and disadvantages. The potential re-search directions and future prospects for the application of photocatalytic oxidation in pharmaceutical wastewater treatment are envisaged. [ABSTRACT FROM AUTHOR]
- Published
- 2024
21. Glutamicibacter nicotianae AT6: A new strain for the efficient biodegradation of tilmicosin.
- Author
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Li, Huijuan, Zhou, Hao, Fan, Liling, Meng, Long, Zhao, Yanyun, Zhao, Lanmei, and Wang, Bo
- Abstract
The degradation of tilmicosin (TLM), a semi-synthetic 16-membered macrolide antibiotic, has been receiving increasing attention. Conventionally, there are three tilmicosin degradation methods, and among them microbial degradation is considered the best due to its high efficiency, eco-friendliness, and low cost. Coincidently, we found a new strain, Glutamicibacter nicotianae sp. AT6, capable of degrading high-concentration TLM at 100 mg/L with a 97% removal efficiency. The role of tryptone was as well investigated, and the results revealed that the loading of tryptone had a significant influence on TLM removals. The toxicity assessment indicated that strain AT6 could efficiently convert TLM into less-toxic substances. Based on the identified intermediates, the degradation of TLM by AT6 processing through two distinct pathways was then proposed. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
22. Accurate prediction and intelligent control of COD and other parameters removal from pharmaceutical wastewater using electrocoagulation coupled with catalytic ozonation process.
- Author
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Li, Yujie, Li, Chen, Jia, Yunhan, Wang, Zhenbei, Liu, Yatao, Zhang, Zitan, DuanChen, Xingyu, Ikhlaq, Amir, Kumirska, Jolanta, Siedlecka, Ewa Maria, Ismailova, Oksana, and Qi, Fei
- Subjects
- *
CHEMICAL oxygen demand , *WASTEWATER treatment , *RESPONSE surfaces (Statistics) , *INTELLIGENT control systems , *CAPACITY (Law) - Abstract
In this study, we employed the response surface method (RSM) and the long short‐term memory (LSTM) model to optimize operational parameters and predict chemical oxygen demand (COD) removal in the electrocoagulation‐catalytic ozonation process (ECOP) for pharmaceutical wastewater treatment. Through RSM simulation, we quantified the effects of reaction time, ozone dose, current density, and catalyst packed rate on COD removal. Then, the optimal conditions for achieving a COD removal efficiency exceeding 50% were identified. After evaluating ECOP performance under optimized conditions, LSTM predicted COD removal (56.4%), close to real results (54.6%) with a 0.2% error. LSTM outperformed RSM in predictive capacity for COD removal. In response to the initial COD concentration and effluent discharge standards, intelligent adjustment of operating parameters becomes feasible, facilitating precise control of the ECOP performance based on this LSTM model. This intelligent control strategy holds promise for enhancing the efficiency of ECOP in real pharmaceutical wastewater treatment scenarios. Practitioner Points: This study utilized the response surface method (RSM) and the long short‐term memory (LSTM) model for pharmaceutical wastewater treatment optimization.LSTM predicted COD removal (56.4%) closely matched experimental results (54.6%), with a minimal error of 0.2%.LSTM demonstrated superior predictive capacity, enabling intelligent parameter adjustments for enhanced process control.Intelligent control strategy based on LSTM holds promise for improving electrocoagulation‐catalytic ozonation process efficiency in pharmaceutical wastewater treatment. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
23. 光纤负载TiO2/VC-CN薄膜光催化降解药厂废水 中有机污染物.
- Author
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刘云庆, 王天行, 朱纹熠, 王兴磊, 巢云龙, and 易丙豪
- Abstract
Copyright of Technology of Water Treatment is the property of Technology of Water Treatment Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
24. Efficient removal of ciprofloxacin from pharmaceutical wastewater using advanced oxidation processes on doped perovskite La₀.₅A₀.₅CoO₃ (A = Sr, Ba and Ce) nanocatalysts
- Author
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Mohammad Ali Jalali, Seyed Mahdi Mousavi, and Moslem Setoodehkhah
- Subjects
Perovskite nanocatalysts ,Ciprofloxacin ,Response surface methodology ,Sol-gel ,Pharmaceutical wastewater ,Chemistry ,QD1-999 - Abstract
In this research, to improve the efficiency of pharmaceutical wastewater treatment processes, perovskite nanocatalysts LaCoO₃ and its doped La₀.₅A₀.₅CoO₃ (A = Sr, Ba and Ce) were synthesized and investigated as persulfate activation catalysts to remove ciprofloxacin. Characterization and identification of these nanocatalysts were done using advanced techniques such as (XRD), (SEM), (DLS), (BET) and (FT-IR). Characterization results indicated higher phase purity of the La₀.₅Sr₀.₅CoO₃ sample, which positively affected the catalytic performance in persulfate activation. The effects of operating variables, including temperature, pH, catalyst amount, and oxidant dosage, on the decomposition process were investigated using experimental design and response surface methodology. Results showed that by adding 0.1 g of La₀.₅Sr₀.₅CoO₃ catalyst to 100 mL of a solution containing ciprofloxacin at a concentration of 10 ppm for 120 min, 91 % of the ciprofloxacin was degraded. By optimizing the operating conditions through experimental design, the performance of this catalyst was improved to 98.5 %. The application of the La₀.₅Sr₀.₅CoO₃ catalyst for ciprofloxacin removal offers several advantages over other methods reported in the literature, including mild reaction conditions, high degradation efficiency, and rapid reaction times.
- Published
- 2025
- Full Text
- View/download PDF
25. 高盐废水厌氧生物处理的强化方法研究.
- Author
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张志飞, 白玉玮, 万金泉, 薛 飞, 闫志成, and 朱 斌
- Abstract
Copyright of Technology of Water Treatment is the property of Technology of Water Treatment Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
- Full Text
- View/download PDF
26. Magnetic r‐graphene oxide‐doped tin‐lanthanum intercalated thiosulfate layered double hydroxide as a new nanocomposite sorbent for the extraction of tetracycline and oxytetracycline residues in pharmaceutical wastewater.
- Author
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Malmir, Maryam and Shemirani, Farzaneh
- Subjects
LAYERED double hydroxides ,ANTIBIOTIC residues ,OXYTETRACYCLINE ,TETRACYCLINE ,TETRACYCLINES ,VALUE stream mapping ,MICROPOLLUTANTS ,IRON oxides - Abstract
A new analytical method combining magnetic micro‐solid phase extraction (μ‐SPE) in tandem with high‐performance liquid chromatography‐ultraviolet (HPLC‐UV) analysis was developed and used for the simultaneous extraction/preconcentration of tetracycline (TC) and oxytetracycline (OTC) residues in drug manufacturing effluents. The μ‐SPE conducted by the introduction of iron oxide reduced‐graphene oxide (MrGO) doped tin‐lanthanium intercalated with thiosulfate ions to produce magnetic LDH (MrGO/Sn‐La‐S). The adsorbent was synthesized and characterized using x‐ray diffraction, Fourier transform infrared, scanning electron microscopy, energy‐dispersive x‐ray, elemental mapping, transmission electron microscopy, x‐ray photoelectron spectroscopy, and value stream mapping techniques. The effective parameters, including the extraction and desorption steps, were investigated and optimized. Under optimized conditions, the limits of detection (LOD) for TC and OTC were obtained as 5.42 and 3.31 μg.L−1, respectively, while the linearity was in the range of 10.0–500.0 μg.L−1 for both antibiotics with satisfactory determination coefficients (R2) of 0.9811 and 0.9846 for TC and OTC, respectively. The recovery percentages for the analytes in real samples were achieved in the ranges of 89.2%–101.6% and 91.0%–101.3% for TC and OTC antibiotics, respectively. All these features proved the potential of the developed method and adsorbent for real world applications. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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27. Treatment of Liquid Waste Loaded with Pharmaceutical Products: A Case of Antibiotics
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Khalidi Idrissi, Amina, Madinzi, Abdelaziz, Mouhir, Latifa, Rifi, Safaa Khattabi, Bouyakhsass, Roukaya, Anouzla, Abdelkader, Abriak, Nor-edine, Souabi, Salah, Negm, Abdelazim, Series Editor, Chaplina, Tatiana, Series Editor, Yadav, Shalini, editor, Ghangrekar, Makarand M., editor, and Yadava, Ram Narayan, editor
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- 2024
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28. Combined High-Temperature Acid Digestion, Iron-Carbon Micro-electrolysis, and Coagulation Reaction for Degrading Pharmaceutical Wastewater with a High Concentration of Dimethylformamide
- Author
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Ma, Mengnan, Cai, Jianjun, di Prisco, Marco, Series Editor, Chen, Sheng-Hong, Series Editor, Vayas, Ioannis, Series Editor, Kumar Shukla, Sanjay, Series Editor, Sharma, Anuj, Series Editor, Kumar, Nagesh, Series Editor, Wang, Chien Ming, Series Editor, and Zhang, Yunhui, editor
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- 2024
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29. Exploring the role of hydrogen peroxide dosage strategies in the photo-Fenton process: Scaling from lab-scale to pilot plant solar reactor
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Bárbara N. Giménez, Agustina V. Schenone, and Leandro O. Conte
- Subjects
Solar photo-Fenton ,Pilot plant reactor ,Ferrioxalate ,Natural pH ,Hydrogen peroxide dosage strategies ,Pharmaceutical wastewater ,Chemical engineering ,TP155-156 - Abstract
This study aims to investigate the role of hydrogen peroxide (HP) continuous dosage in removing Paracetamol (PCT) from different water matrices using the solar photo-Fenton process. Different parameters in the HP dosage strategies (initial HP pulse, dosing time, and HP concentration) were systematically analysed to assess their impacts on pollutant removal (XPCT), oxidant specific consumption (YHP/PCTt), and toxicity levels (I(%)). The analysis involved various water matrices (ultrapure water UW, groundwater GW, anion matrix AW, and synthetic pharmaceutical wastewater IW0.01 or IW0.1), which were firstly treated in a laboratory reactor and subsequently scaled up to a solar prototype. After laboratory testing, the most effective reaction configuration (maximum XPCT and YHP/PCTt close to the stoichiometric one) was chosen as the starting point for scaling up the reaction system. Using the solar reactor setup, complete PCT conversion was achieved within just 60 min of reaction time (UW matrix). However, under IW0.1 condition and employing the same HP dosing strategy, a XPCT of 95.4 % was attained but at 180 min of reaction, highlighting the significant influence of the real matrix. Additionally, the I(%) remained high towards the end of the reaction (close to 60 %), attributed to the presence of hydroquinone in the system, demanding longer reaction times to completely reduce the toxicity when working with industrial wastewater. This comprehensive approach aims to close the gap between lab results and practical applications, offering crucial insights to address pharmaceutical wastewater pollution.
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- 2024
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30. Prospecting the biodegradation of ciprofloxacin by Stutzerimonas stutzeri R2 and Exiguobacterium indicum strain R4 isolated from pharmaceutical wastewater
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Qurban Ali, Rida Zainab, Malik Badshah, Warda Sarwar, Samiullah Khan, Ghulam Mustafa, Tanveer Ibrahim, and Safia Ahmed
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biodegradation ,ciprofloxacin ,co-metabolism ,pharmaceutical wastewater ,ultra-high-performance liquid chromatography ,River, lake, and water-supply engineering (General) ,TC401-506 ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Ciprofloxacin (CIP), an emerging micro-pollutant antibiotic, poses an environmental threat due to its resistance to high-temperature decomposition, aiding antibiotic resistance spread. Conventional degradation generates toxic byproducts, while biodegradation offers an efficient and eco-friendly means to eliminate CIP. In this study, ciprofloxacin-degrading strains were isolated from pharmaceutical wastewater using an enrichment technique. Isolated strains R2 and R4 were identified as Stutzerimonas stutzeri and Exiguobacterium indicum, respectively, based on their 16S rRNA gene sequence. Ciprofloxacin degrading potential of these strains was tested in shake flask fermentation and quantified using spectrophotometric assays and ultra-high-performance liquid chromatography (UHPLC). UHPLC analysis revealed that in co-metabolism, R2 achieved 51 and 77% degradation, and R4 achieved 60 and 68% after 5 and 10 days of incubation. When CIP served as the only carbon source, R2 degraded it by 23 and 35%, while R4 degraded it by 19% and 28 in 5 and 10 days, respectively. Spectrophotometric analyses produced congruent results with UHPLC. Notably, in co-metabolism, R2 and R4 achieved 66 and 88% degradation within the 5 days. Moreover, the degraded residues displayed reduced antimicrobial activity against Escherichia coli and Staphylococcus aureus. In conclusion, both strains show potential for degrading CIP, aiding in mitigating pharmaceuticals and environmental pollutants. HIGHLIGHTS Bacterial strain R2 and R4 was isolated from pharmaceutical wastewater for biodegradation of CIP.; Spectrophotometric and UHPLC analysis was performed to estimate the CIP degradation.; Biotransformation of CIP was higher in co-metabolism compared to direct metabolism.; 66% and 88% of total biodegradation occurred within the first five days of incubation.; Degraded residues of CIP have weaker antimicrobial potential than standard.;
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- 2024
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31. Treatment of pharmaceutical wastewater by combined process of micro- electrolysis-UASB-improved two-stage A/O-sequence batch precipitation
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ZHANG Jinbiao
- Subjects
pharmaceutical wastewater ,uasb ,improved two-stage a/o ,sequence batch precipitation ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
The comprehensive wastewater from a pharmaceutical chemical plant in Shandong Province consists of concentrated wastewater,clean wastewater and domestic wastewater. The concentrated wastewater has the characteristics of high COD and high NH3-N,and therefore requires pretreatment after quality separation to meet the water quality standards for the receiving body of the wastewater treatment plant. Firstly,the concentrated wastewater was pretreated with micro-electrolysis. The pretreated concentrated wastewater was mixed with the clean and domestic wastewaters after removing the suspended solids before undergoing subsequent treatment through an UASB-improved two stage A/O-sequence batch precipitation combination process. Engineering practice showed that this process had a good treatment effect on the comprehensive wastewater,resulting in stable operation and a high capacity to handle impact loads. After treatment,the COD,NH3-N and TN of the effluent were reduced to below 200,3 and 20 mg/L,respectively,meeting the secondary standards in Table 4 of the Comprehensive Sewage Discharge Standard (GB 8978-1996) and meeting the water quality requirements of the receiving water body of the sewage treatment plant.
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- 2024
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32. Comparative study of Fe2+/H2O2 and Fe2+/persulfate systems on the pre-treatment process of real pharmaceutical wastewater
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Yang Ma, Yongwen Ma, Jinquan Wan, Yan Wang, Gang Ye, Zhifei Zhang, and Yining Lin
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advanced oxidation system ,eem ,gc–ms ,pharmaceutical wastewater ,pretreatment ,toxicity testing ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Advanced oxidation technologies based on hydroxyl radical (•OH) and sulfate radical (SO4−•) are two common types of advanced oxidation technologies, but there are not many reports on the application of advanced oxidation methods in actual wastewater pretreatment. This article compares the pre-treatment performance of Fe2+/H2O2 and Fe2+/Persulfate systems in actual pharmaceutical wastewater, and combines EEM, GC-MS, and toxicity testing results to explore the differences in TOC, COD, and NH3-N removal rates, optimal catalyst dosage, applicable pH range, toxicity of effluent after reaction, and pollutant structure between the two systems. The results indicate that the Fe2+/H2O2 system has a higher pollutant removal rate (TOC: 71.9%, COD: 66.9%, NH3-N: 34.1%), but also requires a higher catalyst (Fe2+) concentration (6.0 g/L), and its effluent exhibits characteristic peaks of aromatic proteins. The Fe2+/Persulfate system has a wider pH range (pH ≈ 3-7) and is more advantageous in treating wastewater containing more cyclic organic compounds, but the effluent contains some sulfur-containing compounds. In addition, toxicity tests have shown that the toxicity reduction effect of the Fe2+/Persulfate system is stronger than that of the Fe2+/H2O2 system. HIGHLIGHTS Two types of advanced oxidation systems were compared using actual pharmaceutical wastewater as the research object.; Investigated the pretreatment effect of advanced oxidation systems and explored the possibility of applying advanced oxidation to the pretreatment process of wastewater.; A deeper comparison was made between the two advanced oxidation methods by comparing the EEM and GC–MS results.;
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- 2024
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33. Enhanced tetracycline degradation with TiO2/natural pyrite S-scheme photocatalyst
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Masoumeh Hasham Firooz, Azra Naderi, Masoud Moradi, and Roshanak Rezaei Kalantary
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Photocatalytic removal ,TiO2/NP ,TiO2 ,Pyrite ,Tetracycline (TC) ,Pharmaceutical wastewater ,Medicine ,Science - Abstract
Abstract In this study, TiO2 nanoparticles were employed as a photocatalyst for the degradation of tetracycline (TC) under visible light irradiation. The TiO2 nanoparticles were decorated on natural pyrite (TiO2/NP) and characterized using XRD, FTIR, and SEM–EDX methods. This study evaluated the impacts of various operational parameters such as pH, catalyst dosage, initial TC concentration, and light intensity on TC removal. The findings revealed that under optimal conditions (pH 7, catalyst: 2 g/L, TC: 30 mg/L, and light intensity: 60 mW/cm2), 100% of TC and 84% of TOC were removed within 180 min. The kinetics of TC elimination followed a first-order model. The dominant oxidation species involved in the photocatalytic elimination of TC was found to be ·OH radicals in the TiO2/NP system. The reuse experiments showed the high capability of the catalyst after four consecutive cycles. This study confirmed that the TiO2/NP system has high performance in photocatalytic TC removal under optimized experimental conditions.
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- 2024
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34. Effects of Retention Time, pH, Temperature and Type of Fruit Wastes on the Bioelectricity Generation Performance of Microbial Fuel Cell during the Biotreatment of Pharmaceutical Wastewater: Experimental Study, Optimization and Modelling
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Akinwumi, O. D., Dada, E. O., Agarry, S. E., Aremu, M. O., Agbede, O. O., Alade, A. O., Aworanti, O. A., and Alao, A. I.
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- 2024
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35. Enhanced tetracycline degradation with TiO2/natural pyrite S-scheme photocatalyst
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Hasham Firooz, Masoumeh, Naderi, Azra, Moradi, Masoud, and Kalantary, Roshanak Rezaei
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- 2024
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36. Thermodynamic Study of Adsorption of Amoxicillin on Synthesized NiO of Pharmaceutical Wastewater.
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Naghsh, Navid, Barnoos, Shiva, Zisti, Fatemeh, Chandrika, Kethineni, and Balarak, Davoud
- Subjects
- *
AMOXICILLIN , *SEWAGE , *PHYSISORPTION , *ANTIBIOTIC residues , *HUMAN ecology , *NANOPARTICLES - Abstract
Background: The development of micro-organism resistance in humans and the environment has been linked to the inadequacy of conventional treatment methods in completely eliminating antibiotics. The purpose of this research is to look at the potential for eliminating Amoxicillin (AMO) from aqueous environments using Nickel (II) Oxide Nanoparticles (NiO nanoparticles). Materials and Methods: In order to determine how successful NiO nanoparticles are in eliminating AMO, the impact of many important adsorption process factors, such as the initial concentrations of AMO (10-50 mg/L), pH (3-10), adsorbent dose (0.1-1 g/L), mixing rate (50-300 rpm), contact time (10-100 min), and temperature (15-45°C) was examined. Results: The greatest AMO removal efficiency was 99.48% at pH=7, 0.8 g/L of adsorbent, and contact time of 60 min. The endothermic nature of the adsorption process was suggested by the positive value of Ho. The observed physical adsorption was consistent with the Ho evolved during adsorption, which was less than 40 KJ/mol. The negative value of Go demonstrated that AMO absorbed on the NiO nanoparticles was a spontaneous process. Conclusion: Accordingly, NiO nanoparticles could be employed as a successful adsorbent to eliminate AMO from pharmaceutical wastewater. [ABSTRACT FROM AUTHOR]
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- 2024
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37. Efficient treatment of veterinary pharmaceutical industrial wastewater by catalytic ozonation process: degradation of enrofloxacin via molecular ozone reactions.
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Ikhlaq, Amir, Masood, Zafar, Qazi, Umair Yaqub, Raashid, Muhammad, Rizvi, Osama Shaheen, Aziz, Hafiz Abdul, Saad, Muhammad, Qi, Fei, and Javaid, Rahat
- Subjects
SEWAGE ,INDUSTRIAL wastes ,FLUOROQUINOLONES ,OZONIZATION ,OZONE - Abstract
The study focused on the efficacious performance of bimetallic Fe-Zn loaded 3A zeolite in catalytic ozonation for the degradation of highly toxic veterinary antibiotic enrofloxacin in wastewater of the pharmaceutical industry. Batch experiments were conducted in a glass reactor containing a submerged pump holding catalyst pellets at suction. The submerged pump provided the agitation and recirculation across the solution for effective contact with the catalyst. The effect of ozone flow (0.8–1.55 mg/min) and catalyst dose (5–15 g/L) on the enrofloxacin degradation and removal of other conventional pollutants COD, BOD
5 , turbidity was studied. In batch experiments, 10 g of Fe-Zn 3A zeolite efficiently removed 92% of enrofloxacin, 77% of COD, 69% BOD5 , and 61% turbidity in 1 L sample of pharmaceutical wastewater in 30 min at 1.1 mg/min of O3 flow. The catalytic performance of Fe-Zn 3A zeolite notably exceeded the removal efficiencies of 52%, 51%, 52%, and 59% for enrofloxacin, COD, BOD5 , and turbidity, respectively, achieved with single ozonation process. Furthermore, an increase in the biodegradability of treated pharmaceutical industrial wastewater was observed and made biodegradable easily for subsequent treatment. [ABSTRACT FROM AUTHOR]- Published
- 2024
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38. The performance of pharmaceutical wastewater treatment system of electrocoagulation assisted adsorption using perforated electrodes to reduce passivation.
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Al-Qodah, Zakaria, Al-Zghoul, Tharaa M., and Jamrah, Ahmad
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WASTEWATER treatment ,PASSIVATION ,ADSORPTION (Chemistry) ,CHEMICAL oxygen demand ,CHEMICAL reduction - Abstract
The integrated electrocoagulation-assisted adsorption (ECA) system with a solar photovoltaic power supply has gained more attention as an effective approach for reduction chemical oxygen demand (COD) from pharmaceutical wastewater (PhWW). In this research, the ECA system was used for the treatment of PhWW. Several operating parameters were investigated, including electrode number, configuration, distance, operating time, current density, adsorption time, and temperature. A current density of 6.656 mA/cm
2 , six electrodes, a 20-min time, a 4 cm distance, an MP-P configuration, and a 45 °C temperature produced the maximum COD reductions, where the operating cost of conventional energy was 0.273 $/m3 . The EC, adsorption, and combination of EC and adsorption processes achieved efficient COD reductions of 85.4, 69.1, and 95.5%, respectively. The pseudo-second-order kinetic model and the Freundlich isotherm fit the data of the endothermic adsorption process. Therefore, it was found that the combination processes were superior to the use of these processes in isolation to remove COD. [ABSTRACT FROM AUTHOR]- Published
- 2024
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39. 微电解-UASB-改良型两级 A/O-序批沉淀 工艺处理医药废水.
- Author
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张金彪
- Abstract
Copyright of Industrial Water Treatment is the property of CNOOC Tianjin Chemical Research & Design Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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- 2024
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40. Enhanced tetracycline degradation with TiO2/natural pyrite S-scheme photocatalyst.
- Author
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Hasham Firooz, Masoumeh, Naderi, Azra, Moradi, Masoud, and Kalantary, Roshanak Rezaei
- Subjects
- *
TETRACYCLINE , *PYRITES , *TETRACYCLINES , *HIGH performance computing , *LIGHT intensity - Abstract
In this study, TiO2 nanoparticles were employed as a photocatalyst for the degradation of tetracycline (TC) under visible light irradiation. The TiO2 nanoparticles were decorated on natural pyrite (TiO2/NP) and characterized using XRD, FTIR, and SEM–EDX methods. This study evaluated the impacts of various operational parameters such as pH, catalyst dosage, initial TC concentration, and light intensity on TC removal. The findings revealed that under optimal conditions (pH 7, catalyst: 2 g/L, TC: 30 mg/L, and light intensity: 60 mW/cm2), 100% of TC and 84% of TOC were removed within 180 min. The kinetics of TC elimination followed a first-order model. The dominant oxidation species involved in the photocatalytic elimination of TC was found to be ·OH radicals in the TiO2/NP system. The reuse experiments showed the high capability of the catalyst after four consecutive cycles. This study confirmed that the TiO2/NP system has high performance in photocatalytic TC removal under optimized experimental conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
41. Co掺杂Mn2O3复合材料的构筑及活化过氧单硫酸盐降解医药废水.
- Author
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张 涛, 张 贺, 杜雅欣, and 展思辉
- Abstract
Antibiotics in wastewater pose a major threat to human health and environmental safety, and the generation of reactive oxygen species by peroxomonosulfate (PMS) activation is an attractive option for the treatment of treating antibiotic wastewater. However, achieving efficient PMS activation remains challenging due to insufficient electron mobility efficiency. Herein, Co-doped Mn2O3 catalyst (Co5-Mn2O3) is prepared by a simple one-step calcination method, and the degradation performance of the Co5-Mn2O3/PMS system is investigated using ofloxacin (OFX) as the target pollutant, and the removal of OFX reaches 95% within 15 min, which is 12.3-fold enhancement compared with the pristine Mn2O3, and the degradation performance of the Co5-Mn2O3/PMS system shows excellent degradation performance for a variety of pollutants (ciprofloxacin, sulfamethoxazole, tetracycline, rhodamine B, and methyl orange), which demonstrates the potential for practical applications. It is confirmed by X-ray photoelectron spectroscopy that Co doping induces the surface reconstruction of the catalyst and electron migration to achieve the formation of Mn4+-O-Co2+ active sites. Trap experiments show that the electron-rich Co site and the electron-deficient Mn site could effectively activate PMS to generate sulfate radicals and singlet oxygen for the efficient removal of ofloxacin. This work provides a structural modulation method of the active site for controlling the catalytic function, which will provide a new perspective for the rational design of Fenton-like catalysts. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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42. Novel Zeolite 5Å-Co-Fe based catalytic ozonation process for the efficient degradation of Oxytetracycline in veterinary pharmaceutical wastewater
- Author
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Amir Ikhlaq, Asma Naeem, Osama Shaheen Rizvi, Asia Akram, Abdul Mannan Zafar, Fei Qi, and Ashraf Aly Hassan
- Subjects
Catalytic ozonation ,Emerging pollutant ,Oxytetracycline ,Pharmaceutical wastewater ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Public health and the aquatic environment face significant threats from pollution originating from pharmaceutical wastewater (PhWW) containing stubborn antibiotics. Conventional treatment methods fail to fully eradicate these antibiotics and other contaminants such as COD and BOD5 due to the complex organic compound mixtures present in PhWW. Additionally, PhWW exhibits low biodegradability and high toxicity, mainly due to the persistence of antibiotics. This pressing issue has prompted the scientific community to seek more effective and cost-efficient treatment solutions for detoxifying PhWW. Hence, this study explores the catalytic efficiency of zeolite 5 Å (Z5Å) coated with cobalt and iron (Z5Å-Co-Fe) for the abatement of one of the most persistent organic pollutants oxytetracycline (OTC) as a target pollutant. The synthesized catalyst is assessed using various analytical techniques such as FTIR, SEM, and EDX analysis. Results show that the heterogeneous catalytic ozonation using cobalt and iron-loaded zeolite (Z5Å-Co-Fe/O3) achieves OTC removal rates of 8%, 67%, and 95% through adsorption, ozonation (O3), and Z5Å-Co-Fe/O3 processes, respectively, at pH 6, 1.6 mg/min of O3 flow and 15 min of treatment time. Moreover, the Z5Å-Co-Fe/O3 process demonstrates higher cost-effectiveness compared to other methods, and electrical energy per order (EEO) of 1.47 USD and 1.62 kWh per cubic meter of PhWW respectively. Additionally, it enhances the biodegradability of PhWW from 0.30 to 0.51, making it more suitable for further secondary treatment. Furthermore, Z5Å-Co-Fe/O3 treated PhWW meets National Environmental Quality Standards (NEQS) and holds promise as a pretreatment option for industrial-scale conventional treatment systems. Therefore, it is concluded that the Z5Å-Co-Fe/O3 process was found to be highly efficient for the degradation of OTC in real PhWW matrix and it may help to achieve UN sustainable development goals (SDGs)
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- 2024
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43. Treatment of metronidazole pharmaceutical wastewater using pulsed switching peroxi-coagulation combined with electro-Fenton process
- Author
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Yongjun Liao, Yongbei Ye, Xindi Chen, Haoran Xin, Shuyue Ma, Songwei Lin, and Haiping Luo
- Subjects
Pharmaceutical wastewater ,Metronidazole ,Pulsed switching peroxi-coagulation ,Electro-Fenton ,COD removal ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
The aim of this study was to investigate the metronidazole (MNZ) degradation and real MNZ pharmaceutical wastewater treatment in the pulsed switching peroxi-coagulation (PSPC) process. Different pulsed switching frequencies and running times of H2O2 and Fe2+ productions were tested in the PSPC process. Results demonstrated that MNZ removal of 96.9 ± 1.2 % was realized in the PSPC process with a 200 mg/L MNZ and 0.1 M Na2SO4 solution within 80 min under a pulsed switching frequency of 6s: 1s and a current density of 20 mA/cm2 (H2O2) and 20 mA/cm2 (Fe2+). High MNZ removal could be attributed to efficient •OH production with the highest •OH concentration reached 321 ± 15 μM in the PSPC process. The hydroxyl and carboxyl groups of MNZ were sequentially oxidated by •OH and mineralized based on seven identified intermediates during the MNZ degradation. However, only 56.9 ± 6.7 % of COD was removed in the real MNZ wastewater treatment by the PSPC process within 90 min. A PSPC combined with electro-Fenton (EF) process was developed to enhance the COD removal in the MNZ wastewater. With MNZ wastewater as electrolytes, 3.3 ± 0.3 g/L of H2O2 was produced in a conventional EF reactor. The final COD removal reached 86–90 % using the mixture of effluent from the PSPC, the anode, and cathode chambers of the EF reactor, resulting in less than 80 mg/L COD in the effluent. Results from this study should provide a useful way to enhance real MNZ pharmaceutical wastewater treatment.
- Published
- 2024
- Full Text
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44. Enhanced Pollutant Removal and Antifouling in an Aerobic Ceramic Membrane Bioreactor with Bentonite for Pharmaceutical Wastewater Treatment
- Author
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Salaheddine Elmoutez, Hafida Ayyoub, Mohamed Chaker Necibi, Azzedine Elmidaoui, and Mohamed Taky
- Subjects
pharmaceutical wastewater ,bentonite ,membrane bioreactors ,nitrogen removal ,heavy metal ,adsorption ,Chemical technology ,TP1-1185 ,Chemical engineering ,TP155-156 - Abstract
This study examined the impact of adding bentonite clay (concentration of 1.5 to 10 g/L) to a pilot-scale aerobic ceramic membrane bioreactor (AeCMBR) for treating pharmaceutical wastewater (PhWW). The hydraulic retention time (HRT) was maintained at 24 h; the dissolved oxygen was between 2 mg/L (on) and 4 mg/L (off) throughout operation. Organic and nitrogen pollution removal rates and heavy metal (Cu, Ni, Pb, Zn) reduction rates were assessed. The chemical oxygen demand (COD) removal efficiency exceeded 82%. Adsorption improved ammonia (NH4+) removal to 78%; the addition of 5 g of bentonite resulted in a 38% improvement compared with the process without bentonite. The average nitrate concentration decreased from 169.69 mg/L to 43.72 mg/L. The average removal efficiencies for Cu, Ni, Pb and Zn were 86%, 68.52%, 46.90% and 56.76%, respectively. Bentonite at 5 g/L significantly reduced membrane fouling. The cost–benefit analysis enabled us to predict that the process will meet the multiple objectives of durability, treatment performance and economic viability. The combination of an AeCMBR and bentonite adsorption has proven to be a valuable solution for treating highly polluted wastewater.
- Published
- 2024
- Full Text
- View/download PDF
45. Fe-doped boron nitride for adsorption of oxytetracycline in pharmaceutical wastewater
- Author
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WANG Yong, WU Haofeng, JIN Yan, LUO Guiling, CHAO Yanhong, and ZHU Wenshuai
- Subjects
boron nitride ,ball milling ,adsorption ,oxytetracycline ,pharmaceutical wastewater ,Renewable energy sources ,TJ807-830 ,Environmental protection ,TD169-171.8 - Abstract
To reduce the environmental pollution of oxytetracycline (OTC) in pharmaceutical wastewater, Fe-doped boron nitride nanosheets (Fe-BN) were synthesized in one step with a green and rapid ball milling process, and the adsorption performance of oxytetracycline on them was investigated. The shear stress provided by the mill balls completed thinning and Fe doping of BN at the same time. The properties of the adsorbent were analyzed by XRD, FTIR, XPS, TEM and nitrogen adsorption. Fe(5%)-BN with the best performance was selected for comprehensive adsorption performance and mechanism research, and the results showed that the specific surface area of it was enhanced more than 3 times after 45 minutes of ball milling. Fe element was mainly doped in the BN lamellar structure in the form of Fe_2O_3. Compared with commercial boron nitride, the adsorption capacity of OTC on Fe(5%)-BN increased by 7.7 times. The adsorption conforms to the quasi-second-order kinetic model and Freundlich isotherm model and the adsorption process is spontaneous endothermic. The adsorption is mainly through cation bridge, electrostatic interaction and π—π interaction. After four adsorption-desorption cycles, the removal efficiency of OTC was still higher than 94%, indicating the good cyclic stability of Fe(5%)-BN.
- Published
- 2023
- Full Text
- View/download PDF
46. Novel solar simulated photocatalytic heterolysis of pharmaceutical wastewater via slag nanocomposite immobilization: Optimization using response surface methodology
- Author
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Kingsley Safo, Hussien Noby, Masatoshi Mitsuhara, Hiroshi Naragino, and Ahmed H. El-Shazly
- Subjects
nanocomposite ,optimization analysis ,pharmaceutical wastewater ,photodegradation ,response surface methodology ,slag ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
This study converted slag from the steelmaking industry into an Fe2O3-rich nanocomposite using solvothermal technique for photodegradation of pharmaceutical wastewater in an immobilized mode. The nanocomposite was characterized using XRF, SEM, EDX, TEM, FTIR, XRD, and UV–Vis spectrometer. The XRF analysis result reveals a significant increase in the weight percent of Fe2O3 and SiO2, with a decrease in CaO content. The SEM images revealed the spherical and heterogeneous nature of the nanocomposite in shape and structure, while the FTIR confirms the increase in the vibration band of Si–O–Si and Fe–O with a reduction in the wide stretch mode of Ca–O. The XRD result illustrated the crystalline peak of Fe2O3 with a nanoparticle crystal size of 15.17 nm. The slag nanocomposite was used for the photodegradation of paracetamol. The optimum operating parameters were obtained using response surface methodology at an R2 value of 0.99 and p-value < 0.05. The degradation efficiency obtained at the optimum value was 96.96%. The degradation efficiency of the fifth repeated cycle of the immobilized nanocomposite was 77.89%. The degradation mechanism revealed that OH• radical was the major species of the degradation process. This work showed that slag nanocomposite might be effectively used for pharmaceutical wastewater treatment. HIGHLIGHTS Slag waste was converted into slag nanocomposite and full characterization was achieved.; High photodegradation of paracetamol was attained.; Degradation optimization was attained using response surface models.; Immobilized nanocomposite achieved good stability and recyclability.; Reactive oxidant species investigation was achieved.;
- Published
- 2023
- Full Text
- View/download PDF
47. FeSO4·7H2O optimisation of earthed atomising corona discharge (Fe-EACD) a process for the pharmaceutical wastewater treatment.
- Author
-
Gao, Yunan, Liu, Shui, Zhang, Lunqiu, and Guo, Xiaoying
- Subjects
CORONA discharge ,WASTEWATER treatment ,RESPONSE surfaces (Statistics) ,ENVIRONMENTAL health ,WATER pollution - Abstract
Pharmaceutical residues can cause serious water pollution problems, harm human health and destroy the ecological balance. FeSO
4 ·7H2 O optimisation of the earthed atomising corona discharge (Fe-EACD) process was used to dispose of pharmaceutical wastewater in this research. Experiments were analyzed by VI characteristic curves to optimise the electrode distance (20–50 mm) and wire electrode diameter (0.3–0.5 mm). The effects of discharging voltage (7–12 kV), time (0–54 min) and FeSO4 dosage (0.2–1.2 g/L) were investigated using the response surface methodology (RSM). According to the RSM results, the best removal efficiency of COD (89.6%) was detected at the optimal discharging voltage of 12 kV, time of 42 min and Fe2+ concentration of 0.4 g/L. The Fe-EACD process could work efficiently with BOD5 /COD ratio moving to 0.49 in an acid environment. The kinetic analysis and mechanism study suggested that the Fe-EACD process was demonstrated well by the pseudo-first-order based on the correlation coefficient (R2 ). Active •OH producing in the EACD process is responsible for the COD removal and the FeSO4 ·7H2 O as a catalyst can promote the formation of active hydroxyl. In other words, EACD with Fe2+ optimisation was an economic and feasible process for pharmaceutical wastewater treatment. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
48. Microbial Fluidized Bed Reactor Removing Pharmaceutical Contaminants from Wastewater.
- Author
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Abbas, Mays, Al Kindi, Ghayda Yaseen, and Hussein, Amal Ali
- Subjects
FLUIDIZED bed reactors ,DRUGS ,SEWAGE ,AQUATIC ecology ,CHRONIC wounds & injuries - Abstract
Pharmaceutical contaminants are difficult to remove with standard treatment techniques and are one of the current problems in wastewater treatment. These bioactive substances are considered emerging pollutants due to their persistence and potential impact on aquatic ecosystems. They will continue to function even in small amounts. Efficient wastewater treatment methods are needed to address this issue. As a result, the efforts to develop more efficient wastewater treatment methods have recently intensified. Fluidized bed reactors offer a special opportunity for efficient treatment of wastewater containing recalcitrant pollutants. This article discussed FBBR and covered its advantages, disadvantages, modifications, and applications. Additionally, the FBBR design was briefly discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
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49. An integrated process of Fe/C micro-electrolysis-anaerobic hydrolyze-microalgae for treatment of high concentration pharmaceutical wastewater.
- Author
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Wang, Jiaqi, Yu, Qing, Tang, Bin, Wang, Xiaoxia, Nie, Fahui, Shen, Zheng, and Zhang, Yalei
- Subjects
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SEWAGE , *ELECTROLYSIS , *ANAEROBIC reactors , *WATER purification , *CHEMICAL oxygen demand , *SEWAGE sludge digestion , *IMPACT loads , *IRON ions , *ANAEROBIC digestion - Abstract
As a high concentration wastewater of high organic matter content, many toxic substances, large amounts of organic solvents and poor biochemistry, pharmaceutical wastewater is challenging to handle with a single water treatment technology. In this study, a combined process of Fe/C micro-electrolysis (Fe/C-ME)-anaerobic hydrolyze-microalgae was developed to treat high-concentration pharmaceutical wastewater (i.e. 100,000 mg/L chemical oxygen demand (COD), 2800 mg/L ammonia nitrogen (NH 3 -N) and 130 mg/L total phosphorus (TP)). Firstly, in the Fe/C-ME process, under optimal experimental conditions, the removal rates of COD, NH 3 -N and TP were 55 %, 36 % and 63 %, and it was worth mentioning that the removal of ammonia nitrogen and total phosphorus may be attributed to the complexation and flocculation of hydrated iron ions. Secondly, the outer circulation anaerobic reactor (OCAR) performed biochemical treatment on pretreated pharmaceutical wastewater, 85 % of COD was removed, and it was found that through anaerobic digestion, and further hydrolyzed and acidified macromolecular pollutants into small molecules to reduce the impact load, which was conducive to the subsequent digestion and absorption of microalgae and improved the treatment efficiency of the aerobic section. The microalgae cultivated by heterotrophy using anaerobic effluent, directly used NH 3 -N and TP in wastewater to synthesize substances needed for self-growth and reproduction, and removed 88 %, 91 % and 83 % of COD, NH 3 -N and TP, respectively. The final results indicated that the removal rates of COD, NH 3 -N and TP in the integrated process of Fe/C-ME-anaerobic hydrolysis-microalgae were 99.8 %, 98.6 % and 98.5 %, respectively, demonstrating that the coupling process is an effective method for treating high-concentration pharmaceutical wastewater. [Display omitted] [ABSTRACT FROM AUTHOR]
- Published
- 2023
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50. Exploration of Waste Rice Husk-Based Nano-Silica to Fortify Algal Biomass Harvesting with Charge Neutralization Mechanism
- Author
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Goria, Kajol, Kothari, Richa, Singh, Har Mohan, Kour, Harjot, Ranjan, Piyush, and Pathania, Deepak
- Published
- 2024
- Full Text
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