4,089 results on '"waste water treatment"'
Search Results
2. Mechanistic Insights and Emerging Trends in Photocatalytic Dye Degradation for Wastewater Treatment.
- Author
-
Tak, Sahil, Grewal, Sanjeet, Shreya, Phogat, Peeyush, Manisha, Jha, Ranjana, and Singh, Sukhvir
- Subjects
- *
PHOTOCATALYTIC water purification , *SUSTAINABILITY , *AZO dyes , *PHOTODEGRADATION , *WASTEWATER treatment - Abstract
This review explores advancements, challenges, and considerations in photocatalytic dye degradation for sustainable wastewater treatment. It highlights smart photocatalyst design, visible‐light‐responsive materials, and co‐catalyst engineering, which enhance system efficacy. Despite environmental concerns, the eco‐friendly aspects of photocatalysis offer a promising alternative to traditional methods. Future perspectives emphasize nanotechnology's role in developing effective photocatalysts and integrating visible‐light and solar‐driven systems to meet sustainability goals. Efforts in co‐catalyst engineering and reactor design aim to optimize processes, addressing kinetic and scalability challenges, while economic research focuses on reducing costs to improve competitiveness. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. 水凝胶微球的制备及其对双酚A的吸附性能研究.
- Author
-
杜宏学 and 朴明月
- Abstract
Hydrogel microspheres were synthesized via reverse emulsion/UV light polymerization and employed as adsorbents for removing BPA from aqueous solution. Results demonstrated that the adsorption capacity was pH-independent below pH 8・ decreased when pH values greater than 8・ 0・ The adsorption process achieved an equilibrium state within 12 min, and the maximum adsorption capacity of the hydrogel for BPA was 4. 71 mg/g. The adsorption process was fitted well with the pseudo-second order kinet・ ic and the Freundlich linear isotherm model. Thermodynamic parameters reflected that BPA adsorbed by hydrogel was a spontaneous and exothermic progress・ The hydrogel can be used for five cycles maintaining 100% of adsorption capacity・ Excellent results were also achieved by applying hydrogel for spiked real surface waters, which accounted for more than 91% compared to simulated solution. [ABSTRACT FROM AUTHOR]
- Published
- 2024
4. Challenges and Advances in Tertiary Waste Water Treatment for Municipal Treatment Plants.
- Author
-
Solcova, Olga, Dlaskova, Martina, and Kastanek, Frantisek
- Subjects
WATER purification ,WASTE treatment ,SEWAGE disposal plants ,SEWAGE ,HAZARDOUS wastes - Abstract
Municipal waste water treatment plants have a fundamental task, which is to rid waste water of toxic and health-threatening organic and inorganic substances, including unwanted microorganisms and other pollutants, with the highest possible efficiency so that the discharged water does not contaminate the natural environment, which happens in the case of imperfect cleaning. Current WWTPs usually have a preliminary, primary, and secondary stage, and in very few cases even a tertiary stage, which no longer guarantees the sufficient removal of pollutants from waste water. This research presents the current situation in different parts of the world concerning the possibility of solving the current situation regarding the tertiary and quaternary stages of this process, especially in small and rural WWTPs serving up to approx. 10,000 equivalent inhabitants, which could ensure the removal of so-called emerging pollutants, including microplastics, and would stop WWTPs being point sources of environmental contamination. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
5. Quantitative Analysis of Ferrate(VI) and Its Degradation Products in Electrochemically Produced Potassium Ferrate for Waste Water Treatment.
- Author
-
Homonnay, Zoltán, Stichleutner, Sándor, Kuzmann, Ernő, Kuti, Miklós, Láng, Győző G., Béres, Kende Attila, Trif, László, Nagy, Dániel J., Záray, Gyula, and Lendvai, József
- Subjects
WATER purification ,WASTE treatment ,SEWAGE ,DEBYE temperatures ,ALKALINE solutions - Abstract
Featured Application: Our results demonstrate the easy and accurate control of the amount of active ingredient relative to its degradation product in waste water treatment materials containing ferrate(VI). Potassium ferrate(VI) (K
2 FeO4 ) as a particularly strong oxidant represents an effective and environmentally friendly waste water treatment material. When produced by anodic oxidation in highly alkaline aqueous solution, the K2 FeO4 product is separated and sealed in inert plastic bags with the retention of some liquid phase with high pH. This method proved to be excellent for long-term storage at moderately low temperature (5 °C) for industrial applications. It is still imperative to check the ferrate(VI) content of the product whenever it is to be used. Fe-57 Mössbauer spectroscopy is an excellent tool for checking the ratio of ferrate(VI) to the degradation product iron(III) in a sample. For this purpose, normally the spectral areas of the corresponding subspectra are considered; however, this approximation neglects the possible differences in the corresponding Mössbauer–Lamb factors. In this work, we have successfully determined the Mössbauer–Lamb factors for the ferrate(VI) and for the most common iron(III) degradation products observed. We have found superparamagnetic behavior and low-temperature phase transformation for another iron(III) degradation product that made the determination of the Mössbauer–Lamb factors impossible in that case. The identities of a total of three different iron(III) degradation products have been confirmed. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
6. Recent progresses in improving the photocatalytic potential of Bi4Ti3O12 as emerging material for environmental and energy applications.
- Author
-
Kumar, Amit, Sharma, Pankaj, Wang, Tongtong, Lai, Chin Wei, Sharma, Gaurav, and Dhiman, Pooja
- Subjects
PHOTOCATALYTIC water purification ,HYBRID materials ,CARBON dioxide reduction ,HYDROGEN as fuel ,CLEAN energy - Abstract
[Display omitted] Over past three decades, scientists have worked toward creating different photocatalytic materials with distinct features, with the goal of successful technology transfer. Bi 4 Ti 3 O 12 (BTO)-based materials offer many uses in photocatalytic technology, including wastewater remediation and green energy production. To counter the potential limitations of BTO photocatalyst i.e. quick recombination of photogenerated charges and for increasing visible light absorption and enhancing the photocatalytic activity, several approaches including developing surface defects, elemental doping, formation of heterojunctions and construction of oxygen vacancies were examined in this review. This review discusses the different techniques used in the synthesis of BTO based photocatalysts. This study presents the most recent advances in the development of Bi 4 Ti 3 O 12 -based photocatalysts for the efficient degradation organic pollutants, hydrogen energy production and reduction of carbon dioxide into valuable fuels. At the end, the current issues and future prospective in engineering and use of BTO based photocatalyst for improving photocatalytic activity under lab control and large-scale conditions are also discussed. Conclusively, this review aims to inspire more creative work on designing BTO based photocatalysts with great potential which accelerates the discovery of high performance photocatalysts for environmental remediations. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
7. Waste Water Treatment Using Piezoelectric Materials: A Review on Piezo-photocatalysis.
- Author
-
Singh, Karambir, Verma, Ritesh, Chauhan, Ankush, Jasrotia, Rohit, Saini, Shobhit, Thakur, Pankaj, Kumar, Vinod, Thakur, Preeti, and Thakur, Atul
- Subjects
- *
CARBON dioxide adsorption , *WATER purification , *PIEZOELECTRIC materials , *WASTE treatment , *SEWAGE - Abstract
Over time, industrialization, population expansion, building, and other human-related activities have made water contamination a major problem. As a result, steps towards waste water treatment must be taken. By using piezoelectric materials in the purifying process, a new area of waste water treatment known as piezo-photocatalysis has emerged. To improve the material's water purification effectiveness, the piezoelectric action is paired with sun irradiation in this case. Up until this point, photocatalysis has served as a sophisticated method for purification. Thus, the piezoelectric materials became the center of attention in the quest for cutting-edge technologies for water purification. Piezoelectric materials have other potential applications outside of water treatment, including hydrogen production and carbon dioxide adsorption. The lead, barium, KNN, and bismuth perovskite compounds that have seen extensive usage in wastewater treatment are covered in this paper. These materials have the potential to achieve an efficiency of almost 100% when they combine the effects of piezoelectricity with photocatalysis. Consequently, the function of piezoelectric materials in wastewater treatment and the mechanism of piezo-photocatalysis are covered extensively in this paper. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
8. A Comprehensive Review on Photocatalytic Degradation of Textile Dyes Using PANI-Semiconductor Composites.
- Author
-
Sajith, Malavika, S., Hema, and Sambhudevan, Sreedha
- Subjects
INDUSTRIAL wastes ,PHOTODEGRADATION ,WATER purification ,WASTE treatment ,CONDUCTING polymers ,POLYANILINES - Abstract
The dyeing process in textile industries has significant environment implication, primarily due to the release of a large amount of water effluents. Photocatalyst is a perennially effective technique used for the degradation of toxic, low- biodegradable hazardous effluents from water bodies. This method is highly selective, cost-effective, straightforward synthesis, and environmentally friendly process. Semiconductor metal oxides-based photocatalysts have gained attraction due to their superior properties including less toxicity and environment applications. However, their widespread implementation has diminished because of the poor photocatalytic activity in the visible region. To address this limitation, incorporating a conducting polymer particularly Polyaniline, has proven more effective. The enhanced charge-carrying capacity and ability to change the optical band gap makes the semiconductor more efficient for the degrading the organic effluents from the water bodies. This review primarily focuses on degradation of poisonous dyes present in textiles wastewater, using the polyaniline-semiconductor nanocomposite as a photocatalyst material. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
9. Algal organic matter induced photodegradation of tinidazole.
- Author
-
Ahmad, Waseem, Kaur, Nikky, and Parashar, Amit
- Subjects
- *
PHOTODEGRADATION , *WASTEWATER treatment , *DRUG derivatives , *DRUG residues , *ORGANIC compounds , *ANTIBIOTIC residues - Abstract
Antibiotic pollution has become one of the most emerging problems of the modern era. Tinidazole (TDZ) is one the most important nitroimidazole derivative drugs whose use has tremendously increased in the last few years. The proposed research work provides a good alternative cost-effective method for wastewater treatment. In the present investigation, algae were used as a photosensitizer in the treatment of the wastewater that was contaminated with antibiotic residue. The proposed research also provides the probable mechanism involved in the photodegradation of tinidazole. The different factors like concentration and pH of the test solution which play a key role in the photodegradation of drug molecules are also discussed in the present investigation. The result of this study established that the maximum degradation of drug molecules was observed at the algal concentration of 1.6 × 108 Cell/L and approximately 58% of drug molecules were degraded. This study also established that in an acidic medium ie at pH 5 the degradation occurs more efficiently. Results of the current study indicated that the use of algae-induced photodegradation of drug residue became one of the most promising routes for wastewater treatment. The results of the present study provide a new way to treat wastewater contaminated with antibiotics residue. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
10. 纳米零价铁耦合高级氧化技术处理废水的研究进展.
- Author
-
贾仲琪, 卫金秋, 宿 辉, and 刘宪斌
- 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.)
- Published
- 2024
- Full Text
- View/download PDF
11. Landfill leachate treatment process is transforming and releasing banned per- and polyfluoroalkyl substances to UK water
- Author
-
Pippa Neill and David Megson
- Subjects
per- and polyfluoroalkyl substances ,PFAS ,PFOS ,PFOA ,landfill leachate ,waste water treatment ,Environmental technology. Sanitary engineering ,TD1-1066 - Abstract
Landfills are a known source of PFAS pollution. Many have environmental permits allowing the discharge of treated leachate to controlled waters. In this article we compared leachate data for 17 PFAS from 17 different landfill sites across the UK. The results show that the landfill leachate treatment process (designed to improve water quality) is generating the banned PFAS; PFOA and PFOS. Approximately 80% of locations tested showed an increase in PFOS, with an increase of 1,335% in one sample. The highest concentrations of PFOS and PFOA in treated leachate were 2,460 ng L−1 and 26,900 ng L−1, respectively. When compared against the environmental quality standard of 0.65 ng L−1 for PFOS this leachate could pose a significant concern. Landfill leachate treatment has proven effective for a wide range of different pollutants, but this research shows in several instances that it is not appropriate for PFAS remediation.
- Published
- 2024
- Full Text
- View/download PDF
12. Biochar-Based Photocatalysts and Their Application
- Author
-
Afridi, Saima Khan, Umar, Khalid, Adnan, Rohana, Parveen, Tabassum, Jawaid, Mohammad, Series Editor, Khan, Anish, Series Editor, Bhawani, Showkat Ahmad, editor, Umar, Khalid, editor, Mohamad Ibrahim, Mohamad Nasir, editor, and Alotaibi, Khalid M., editor
- Published
- 2024
- Full Text
- View/download PDF
13. Overview of Applications of Artificial Intelligence (AI) in Diverse Fields
- Author
-
Kuhar, Nikki, Kumria, Poonam, Rani, Swati, and Gulati, Shikha, editor
- Published
- 2024
- Full Text
- View/download PDF
14. Overcoming Challenges in Traditional Waste Water Treatment Through AI-Driven Innovation
- Author
-
Sakkaravarthy, Shanmugapriya, Jano, Negasso Argeta, Vijayakumar, Ajitha, Kostianoy, Andrey G., Series Editor, Carpenter, Angela, Editorial Board Member, Younos, Tamim, Editorial Board Member, Scozzari, Andrea, Editorial Board Member, Vignudelli, Stefano, Editorial Board Member, Kouraev, Alexei, Editorial Board Member, and Garg, Manoj Chandra, editor
- Published
- 2024
- Full Text
- View/download PDF
15. Application of Microorganisms in Emerging Waste Management Strategies and Remediation of Synthetic and Cellulosic Microfibers
- Author
-
Satapathy, Swapnashree, Kar, Dattatreya, Priyadarsini, Sailaja, Das, Alok Prasad, Kuanar, Ananya, Das, Alok Prasad, editor, Behera, Ipsita Dipamitra, editor, and Bhanja, Dipalee, editor
- Published
- 2024
- Full Text
- View/download PDF
16. Challenges in Environmental Biotechnology
- Author
-
Kaur, Avneet, Jaiswal, Jyoti, Sharma, Mohit, Ahmad, Faizan, editor, Mohammad, Zahra H., editor, Ibrahim, Salam A., editor, and Zaidi, Sadaf, editor
- Published
- 2024
- Full Text
- View/download PDF
17. Screening of Wastewater Treatment Efficacy of Domestic Sewage Water Using Nano Zerovalent Iron Synthesized by Chemical and Biological Route
- Author
-
Sivasuriyan, Krithika Shree, Namasivayam, S. Karthick Raja, Raju, Sathyanarayana, Bharani, R. S. Arvind, and Sowmya, R.
- Published
- 2024
- Full Text
- View/download PDF
18. Progress on degradation of organic pollutants in water by bismuth-based photoelectrocatalysts
- Author
-
LI Biqiu, LI Xicheng, XIONG Junfu, LI Jinhan, JIA Boya, and WANG Changzheng
- Subjects
photoelectrocatalysis ,bismuth-based material ,waste water treatment ,composite electrode ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Photoelectrocatalytic technology,which assists photocatalysis through an electric field, can effectively inhibit the recombination of photogenerated carriers and improve the removal rate of organic pollutants, exhibiting advantages of simplicity, efficiency, and ease of operation. Photoelectrode material is the key to photoelectrocatalytic technology. Compared with other traditional catalysts, bismuth-based semiconductors have a higher utilization rate of light due to their unique layered structure and suitable forbidden band width. The layered structure of the bismuth-based materials can induce an internal electric field in the layer, promote the separation of photogenerated electrons and holes, accelerate the transfer of carriers, and improve the photocatalytic performance. The preparation, characterization and performance of unary bismuth compounds, bismuth binary oxides compounds, bismuth oxyhalide compounds and oxyacid bismuth compounds were introduced, and the advantages of bismuth-based materials as photoelectrode materials were briefly described. The research on its degradation of organic pollutants was reviewed, the application of bismuth-based materials to photoelectrocatalysis for wastewater treatment was summarized.The development of new catalysts and how to promote the establishment of and evaluation system for the impact on the environment during the whole life cycle of catalysts were the key directions for subsequent research.
- Published
- 2024
- Full Text
- View/download PDF
19. A COMPREHENSIVE REVIEW ON ASSESSMENT OF AGRICULTURAL CROP WASTE MATERIALS AS BIOADSORBENTS FOR ENVIRONMENTAL REMEDIATION.
- Author
-
Rehan, Rehan, Sharma, Ankita, Thakur, Shivender, Devi, Rajkumari Asha, Thakur, Vandana, Sharma, Sunny, Kumar, Rupesh, and Kumar, Amit
- Abstract
Agriculture, a legacy from our ancient ancestors, is fundamental to human survival and prosperity. Each year, the agricultural industry generates a substantial volume of agricultural and horticultural waste. Concurrently, the disposal of solid waste, particularly heavy metal ions originating from a variety of metal manufacturing industries, poses a significant societal challenge and constitutes a considerable environmental hazard. Hence, bioadsorbents are viable alternate components in comparison to conventional tactics for the wastewater purification and are capable of competing graciously in the eradication of heavy metal ions from wastewater. The review deliberates the impending use of different agricultural waste and their utilization for the removal of heavy metals and contaminants in wastewater based on their adsorption capacities and operating factors, cost-effectiveness, and practical engineering solutions. Biosorption is considered as operational and eco-friendly alternative to conventional techniques such as chemical precipitation, ion exchange, and membrane filtration for removing toxic metal ions. This review emphasizes the exploitation of readily available agricultural waste as adsorbents for mitigating environmental pollutants. It further scrutinizes the influence of various treatment methodologies on augmenting their efficacy in pollution reduction. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
20. 铋系光电催化剂降解水中有机 污染物的研究进展.
- Author
-
李碧秋, 李希成, 熊俊夫, 李金韩, 贾博雅, and 汪长征
- Abstract
Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering 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
21. Green Synthesis of Recyclable BaPbFe2O6 Nanoparticles for Photocatalytic Removal of Organic Dye Pollutant.
- Author
-
CHOUHAN, JEEVAN KUNWAR, PRAJAPATI, DUSHYANT KUMAR, MENARIA, JINESH, and BHARDWAJ, SHIPRA
- Subjects
PRECIPITATION (Chemistry) ,BAND gaps ,OXIDE coating ,HYDROXYL group ,PHOTOCATALYSTS ,ORGANIC dyes - Abstract
This study focuses on the synthesis of BaPbFe
2 O6 and modifying its photocatalytic activity by precipitation method on brilliant green (BG) dye. According to the characterization data, the UV-Vis absorption spectrum shows several peaks with an optical band gap of 5.45 eV. FESEM images showed irregular shapes of BaPbFe2 O6 and EDX confirmed the presence of, Ba, Pb, Fe and O elements. The average particle size measured with maximum diffraction peak using Scherrer's equation was 12.31nm. XPS represents the different oxidation states of the elements. FTIR images show the presence of oxide film on the surface with a band gap of 500-600 cm-1 given as the characteristic stretched band of Pb-O. Maximum degradation is shown on the above optimum condition and complete degradation was held in 20 min on optimum conditions. The degradation rate of BaPbFe2 O6 is 86.89% of 4*10-5 M for BG dye by exposing to sunlight for 20 minutes. Degradation of BG dye occurs due to the formation of hydroxyl radicals (.OH) on exposure to sunlight following pseudo first order kinetics. Therefore, BaPbFe2 O6 synthesized in this paper can be used for the degradation of other exogenous organisms and for the treatment of wastewater and environmental polluted samples. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
22. Removal of Glucose from Water Via Gaseous CO2 Injection and Hydrates Formation: Process Feasibility as a Function of the Initial Glucose Concentration in Water.
- Author
-
Gambelli, Alberto Maria, Rossi, Federico, and Gigliotti, Giovanni
- Subjects
WATER purification ,SEWAGE ,WASTE treatment ,GAS hydrates ,CARBON dioxide ,METHANE hydrates - Abstract
The production of gas hydrates is a widely recognised technique for impurities removal from waste water. Similar to ice, hydrate crystals cannot include ions and other impurities dissolved in water. Therefore, their formation, separation from the liquid phase and following dissociation, leads to the production of two distinguished liquid phases: the first, obtained from hydrate dissociation, which theoretically consists of demineralised water; the second, or the remained water, having a concentration of impurities higher than its initial values. However, mainly due to the stochastic nature of the hydrate formation process, the feasibility of such a strategy has not been completely validated yet, especially for substances different from ions. This study investigates the possibility of forming carbon dioxide hydrates to remove glucose (at different initial concentrations) from water. In order to achieve a satisfying treatment of water, two parameters were investigated: the effective capability of hydrates to produce decontaminated water and the abundancy of treated water, or the quantity of hydrates produced as a function of the initial glucose concentration in the liquid phase. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
23. Development of Microalgae-Bacteria Consortium for the Treatment of Domestic Waste Water.
- Author
-
Sharma, Shiwani Guleria, Singla, Poonam, and Kocher, Gurwinder Singh
- Abstract
Microalgae and bacteria are diverse in nature and can be utilized to form complementary consortium for efficient waste water treatment and nutrient recovery. The purpose of the study was to isolate microalgae and bacteria from the indigenous population L1 & L2 with waste water treatment efficacy. Two microalgae i.e. PL1 and PL2 and four bacteria i.e. B1(L1), B3(L1), B2(L2) and B4(L2) were selected with potential of waste water treatment. Twenty nine different consortia were designed based on possible combinations of selected microalgae and bacteria. Among all, consortium 29, which comprises both microalgae PL1 & PL2 and one bacteria i.e. B4(L2) has shown the significant reduction in BOD (82.9%), COD (77.77%), EC (53.8%), TDS (74.3%), TN (71.05%), and TP (69.25%) after 15 days of treatment. Further higher reduction in BOD, COD, TN & TP in treated water was achieved with application of aeration source. Molecular identification of members of consortia 29 revealed that PL1 was Chlorella variabilis (Accession No. OR122520.1), PL2 was tentatively identified as Desmodesmus sp., and B4(L2) (Accession No. OR467496.1) was identified as Paracoccus sp. SEM observations were correlated with waste water treatment performance of consortium as microalgae PL1 & PL2 and bacteria B4(L2) can live together. Hence, wastewater treatment performance of developed microalgae-bacteria consortium has established a research roadmap for possible implementation of the consortium systems for large scale treatments of various kind waste waters. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
24. Quantitative Analysis of Ferrate(VI) and Its Degradation Products in Electrochemically Produced Potassium Ferrate for Waste Water Treatment
- Author
-
Zoltán Homonnay, Sándor Stichleutner, Ernő Kuzmann, Miklós Kuti, Győző G. Láng, Kende Attila Béres, László Trif, Dániel J. Nagy, Gyula Záray, and József Lendvai
- Subjects
potassium ferrate(VI) ,waste water treatment ,anodic oxidation ,Mössbauer spectroscopy ,Debye temperature ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Potassium ferrate(VI) (K2FeO4) as a particularly strong oxidant represents an effective and environmentally friendly waste water treatment material. When produced by anodic oxidation in highly alkaline aqueous solution, the K2FeO4 product is separated and sealed in inert plastic bags with the retention of some liquid phase with high pH. This method proved to be excellent for long-term storage at moderately low temperature (5 °C) for industrial applications. It is still imperative to check the ferrate(VI) content of the product whenever it is to be used. Fe-57 Mössbauer spectroscopy is an excellent tool for checking the ratio of ferrate(VI) to the degradation product iron(III) in a sample. For this purpose, normally the spectral areas of the corresponding subspectra are considered; however, this approximation neglects the possible differences in the corresponding Mössbauer–Lamb factors. In this work, we have successfully determined the Mössbauer–Lamb factors for the ferrate(VI) and for the most common iron(III) degradation products observed. We have found superparamagnetic behavior and low-temperature phase transformation for another iron(III) degradation product that made the determination of the Mössbauer–Lamb factors impossible in that case. The identities of a total of three different iron(III) degradation products have been confirmed.
- Published
- 2024
- Full Text
- View/download PDF
25. Applications of HYDRUS Based CW2D Wetland Module: a Review
- Author
-
Pal, Rama, Suna, Truptimayee, Kushwaha, N. L., Rashmi, I., and Madhu, M.
- Published
- 2024
- Full Text
- View/download PDF
26. Interval-valued intuitionistic fuzzy AROMAN method and its application in sustainable wastewater treatment technology selection.
- Author
-
Alrasheedi, Adel Fahad, Mishra, Arunodaya Raj, Pamucar, Dragan, Devi, Sarita, and Cavallaro, Fausto
- Subjects
- *
SUSTAINABILITY , *WASTEWATER treatment , *AGGREGATION operators , *FUZZY sets , *WATER purification - Abstract
In the theory of interval-valued intuitionistic fuzzy set (IVIFS), the rating/grade of an element is the subset of the closed interval [0, 1], therefore the IVIFS doctrine is more useful for the decision expert to present their judgments in terms of intervals rather than the crisp values. The present work develops an integrated decision-making methodology for evaluating sustainable wastewater treatment technologies within the context of IVIFS. The proposed decision-making framework is divided into three stages. First, some Yager weighted aggregation operators and their axioms are developed to combine the interval-valued intuitionistic fuzzy information. These operators can offer us a flexible way to solve the realistic multi-criteria decision-making problems under IVIFS context. Second, an extension of Symmetry Point of Criterion model is introduced to determine the criteria weights under IVIFS environment. Third, an integrated alternative ranking order model accounting for two-step normalization (AROMAN) approach is proposed from IVIF information perspective. Next, the practicability and efficacy of the developed model is proven by implementing it on a case study of sustainable wastewater treatment technologies evaluation problem with multiple criteria and decision experts. Finally, comparative analysis is discussed to illustrate the consistency and robustness of the obtained outcomes. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
27. Nanozymes as Catalytic Marvels for Biomedical and Environmental Concerns: A Chemical Engineering Approach.
- Author
-
T, Selva Kumar, BS, Mitchelle Nissintha Daisy, Babu, Lavudiya Ramesh, Paul, Ambigalla Ebenezer, Murugan, Sevanan, and Periakaruppan, Rajiv
- Subjects
- *
SYNTHETIC enzymes , *CHEMICAL engineering , *CHEMICAL engineers , *BIOREMEDIATION , *WATER purification , *FOOD contamination , *ORGANOPHOSPHORUS pesticides - Abstract
Nanozymes, a class of nanomaterials endowed with enzyme-like catalytic activities, have emerged as a transformative force in the fields of biotechnology and environmental science. This review provides an in-depth analysis of nanozymes, from their synthesis and properties to their diverse applications. The synthesis of nanozymes is a pivotal aspect of their development, involving intricate methods to create these nanoscale catalysts. The exploration begins with a fundamental definition of nanozymes as nanomaterials mimicking the catalytic functions of natural enzymes. Then the paper delved into numerous sources of nanozymes, ranging from noble metals to metal oxides, and elucidates the key preparation techniques that enable the fine-tuning of their catalytic properties. The remarkable properties of nanozymes are closely examined, focusing on their catalytic efficiency, stability, and adaptability. These properties lay the foundation for the extensive array of applications they offer. Nanozymes have revolutionized the imaging and tracking of microbes through luminescence and fluorescence detection, making them invaluable in understanding and combatting bacterial and viral infections. Their integration into biosensors has elevated disease detection and pesticide monitoring to unprecedented levels of sensitivity and accuracy, promising innovative solutions for diagnostic and analytical purposes. Additionally, nanozymes have paved the way for advancements in immunoassays, enhancing the precision of disease diagnosis and therapeutic interventions. Furthermore, the therapeutic potential of nanozymes is gaining recognition, with notable applications in antibacterial, antioxidant, and antifouling treatments. Their use in the treatment of cardiovascular diseases, cancer therapy, and orthopaedics showcases their versatility in clinical applications. In the food industry, nanozymes have improved food quality, safety, and shelf life, contributing to our well-being. Moreover, nanozymes have demonstrated their environmental significance by efficiently detecting and degrading pollutants, thereby promoting water treatment and environmental preservation. In summary, this review encapsulates the dynamic landscape of nanozymes, providing a technical insight into their synthesis, diverse properties, and wide-ranging applications. Nanozymes, with their unparalleled versatility, hold great promise for addressing contemporary challenges in both biotechnology and environmental sustainability. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
28. Isolation and identification of an alkaline-tolerant aerobic denitrifying bacterium and its denitrification performance.
- Author
-
DUAN Xingfan, KANG Xin, ZHAO Yibiao, CHEN Xiaohua, SHEN Genxiang, and ZHAO Xiaoxiang
- Subjects
DENITRIFYING bacteria ,AEROBIC bacteria ,DENITRIFICATION ,SODIUM acetate ,POTASSIUM nitrate - Abstract
To improve the low efficiency of microbial denitrification under strong alkaline environment, an aerobic denitrifying strain with strong alkaline adaptability was isolated from Shanghai paddy soil. The strain was identified as Acinetobacter junii by cell morphology and 16S rDNA analysis, and named as Acinetobacter junii strain 5-2. The effect of denitrification under different environmental conditions was investigated with single-factor effect experiments, and it was found that it could maintain a high nitrate removal rate(>90%) within a certain pH(7.0-12.0) and salt mass concentration range(10-30 g/L). After 120 h incubation with sodium acetate as carbon source, potassium nitrate as nitrogen source, m(C)/m(N) of 12, temperature of 35°, rotation of 90 r/min, initial pH of 10.0 and initial nitrate-nitrogen content of 41.07 mg/L, the removal rates of nitrate-nitrogen and total nitrogen by this strain were 97.83% and 65.85% respectively. Meanwhile, the activity and genes of enzymes related to aerobic denitrification of this strain were examined. The results show that Acinetobacter junii strain 5-2 has high aerobic denitrification capacity and is expected to be applied to treat actual nitrogenous wastewater. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
29. Flocculating oil sands tailings with dual anionic/cationic polymers: Dose and charge density effects.
- Author
-
Dixon, Daniel V. and Soares, João B. P.
- Subjects
OIL sands ,SURFACE charges ,FLOCCULATION ,ZETA potential ,DENSITY ,CATIONIC polymers - Abstract
A two‐step process, with anionic hydrolyzed polyacrylamide (HPAM) and cationic poly(vinylbenzyl trimethylammonium chloride) (PVBTMAC), was used to flocculate oil sands mature fine tailings (MFT). The charge density of HPAM and the dosages of HPAM and PVBTMAC were varied to maximize the dewatering of MFT and minimize the turbidity of the supernatant. The dual flocculant system performed better at lower doses than when used alone. The best HPAM charge density for fast initial settling rate and high sediment solids content was 32%, but it increased to 38% for best sediment dewatering, as measured by capillary suction time. The clearest supernatants were found when the zeta potential approached 0 mV because the cationic PVBTMAC neutralized the surface charges of the particles suspended in the MFT. More importantly, undiluted MFT was flocculated with the HPAM/PVBTMAC system and then filtered at low‐pressure (69 kPag), resulting in a filter cake with a high solids content of 61 wt.%. This study shows that treating MFT with a combination of anionic and cationic polymer is a flexible way to optimize flocculation performance. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
30. 静电纺纳米纤维膜在废水处理领域的应用.
- Author
-
高国慧, 于小慧, and 王雪琴
- Abstract
Copyright of Wool Textile Journal is the property of National Wool Textile Science & Technology Information Center 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
31. Investigating the Treatment of Paper Industry Effluent Using Ozonation Process
- Author
-
Meisam Abdolkarimi-Mahabadi and Ahmad Bayat
- Subjects
ozonation ,waste water treatment ,experimental design ,paper industry ,Technology ,Water supply for domestic and industrial purposes ,TD201-500 ,Sewage collection and disposal systems. Sewerage ,TD511-780 - Abstract
In this research, the ozonation process has been used as a supplementary stage of purification to reduce the amount of chemical oxygen demand and remove bacteria, especially E. Coli, from the effluent of the paper industry. Box-Behnken Design statistical method is used to optimize the treatment conditions. In this method, the effect of three variables governing the ozonation process, including the initial pH of the effluent, the amount of input ozone (mg/min) O3 and the duration of ozonation (min) t, was investigated. The results showed that the amount of input ozone and pH had the greatest impact on reducing COD (up to about 80%). Also, the maximum efficiency of the ozonation process for the complete removal of E. Coli was seen in acidic conditions with high amounts of ozone and increasing the duration of ozonation. According to the results, it was found that ozone in molecular form and by direct attack in acidic environments played a role in the destruction of pollutants. Design Expert software was used to determine the optimal conditions, minimize residual COD and maximize the efficiency of the ozonation process. The values of pH=5.2, ozone amount (131mg/min) and duration (23 min) are predicted to reach the lowest residual COD value (48 mg/L) and the highest efficiency (100% removal of E. Coli). According to the investigations carried out in this research, it can be concluded that the use of ozonation process to reduce COD and effectively remove E. Coli from the waste water of paper industry is a promising complementary method.
- Published
- 2023
- Full Text
- View/download PDF
32. Utilization of Household Sewage Sludge as Resource: The Effect of the Temperature of Pyrolysis on the Chemical Properties
- Author
-
Kovacs, Jozsef, Ghosh, Sadhan Kumar, Ghosh, Sadhan Kumar, editor, and Ghosh, Sannidhya Kumar, editor
- Published
- 2023
- Full Text
- View/download PDF
33. Nanotechnology: Emerging Opportunities and Regulatory Aspects in Water Treatment
- Author
-
Lugani, Yogita, Vemuluri, Venkata Ramana, Sooch, Balwinder Singh, Bennett, Erin R., Series Editor, Panagiotakis, Iraklis, Series Editor, Chrysochoou, Maria, Advisory Editor, Dermatas, Dimitris, Advisory Editor, di Palma, Luca, Advisory Editor, Lekkas, Demetris Francis, Advisory Editor, Menone, Mirta, Advisory Editor, Metcalfe, Chris, Advisory Editor, Moore, Matthew, Advisory Editor, Kumar, Raman, editor, Kumar, Rajeev, editor, and Chaudhary, Savita, editor
- Published
- 2023
- Full Text
- View/download PDF
34. Metal Organic Framework (MOF)-Based Membranes for Separation Applications
- Author
-
Kanzariya, Dashrathbhai B., Patel, Krupa U., Desai, Rudra, Pal, Tapan K., Ghosh, Arindam, Series Editor, Chua, Daniel, Series Editor, de Souza, Flavio Leandro, Series Editor, Aktas, Oral Cenk, Series Editor, Han, Yafang, Series Editor, Gong, Jianghong, Series Editor, Jawaid, Mohammad, Series Editor, Rao, N. Madhusudhana, editor, Lingamallu, Giribabu, editor, and Agarwal, Mangilal, editor
- Published
- 2023
- Full Text
- View/download PDF
35. Metagenomics Analysis of Extremophiles and Its Potential Use in Industrial Waste Water Treatment
- Author
-
Shettihalli, Ashok Kumar, Vinjamuri, Saisha, Divijendra Natha Reddy, S., Pai, Renu, Narayanan, Prathibha, and Shah, Maulin P., editor
- Published
- 2023
- Full Text
- View/download PDF
36. Polymeric Nano-composite Membranes for Waste Water Treatment
- Author
-
Jakka, Venkatalakshmi, Sengupta, Shubhalakshmi, Thakur, Vijay Kumar, Series Editor, Nadda, Ashok Kumar, editor, Banerjee, Priya, editor, Sharma, Swati, editor, and Nguyen-Tri, Phuong, editor
- Published
- 2023
- Full Text
- View/download PDF
37. An Overview of Nanomaterials—Synthesis, and Their Applications for Wastewater Treatment
- Author
-
Ghosh, Subhasis, Mukherjee, Sayan, Hossain, Sk. Aakash, Chakraborty, Poushali, Roy, Sanket, Das, Papita, and Shah, Maulin P., editor
- Published
- 2023
- Full Text
- View/download PDF
38. Adsorption of Cr(VI) onto Azadirachta indica stem bark extract modified dolerite composite adsorbent.
- Author
-
Amaku, James Friday, Ngwu, Comfort M., Nnaji, J. C., Odoemelam, S. A., Ifeanyi, Ugwu Boniface, Okorie, Helen Chukwuemeka, and Zubairu, SiyakaMj
- Subjects
- *
NEEM , *DIABASE , *ADSORPTION (Chemistry) , *X-ray diffraction , *DIFFUSION control , *WASTE treatment - Abstract
This study assessed the adsorptive uptake of Cr(VI) onto eco-friendly adsorbent fabricated via the surface coating of pristine dolerite (PD) using the extract ofAzadirachta indica stem bark. The materials were characterised using the XRD, FESEM, FTIR, EDX, BET and Raman analysis. Optimum adsorption of Cr(VI) onto AMD was achieved at pH = 2, contact time of 180 min and dosage of 0.03 g. The adsorption equilibrium data for PD and Azadirachta indica extract modified dolerite (AMD)fitted well with the Langmuir and Redlich-Peterson models respectively at 318 K.Also, a good correlation between the experimental data and the Elovich kinetic model was achieved. The diffusion mechanisms were both controlled by film diffusion and intraparticle diffusion.The uptake of Cr(VI) onto PD and AMD was feasible, endothermic (ΔH: PD = 14.14 kJ mol−1 and AMD = 37.67 kJ mol−1) and entropy-driven (ΔS: PD = 17.69 J K−1 mol−1 204.3 J K−1 mol−1). Besides, the recyclabilitypropensity of AMD afterseveral cycles projects AMD as a fibrousbasedmaterialwithsustainablepotential for the decontamination of Cr(VI) polluted water. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
39. 煤矸石制备混晶型分子筛及其吸附铜锌离子性能研究.
- Author
-
马清水, 郭 瑞, and 张玉波
- Abstract
Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing 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
- 2023
- Full Text
- View/download PDF
40. Gum-based nanocomposites for the removal of metals and dyes from waste water.
- Author
-
Usman, Muhammad, Taj, Muhammad Babar, and Carabineiro, Sónia Alexandra Correia
- Subjects
SEWAGE ,XANTHAN gum ,GUAR gum ,WASTE treatment ,WATER purification ,DYE-sensitized solar cells ,DYES & dyeing ,ORGANIC dyes - Abstract
The importance of water for all living organisms is unquestionable and protecting its sources is crucial. In order to reduce water contaminants, like toxic metals and organic dyes, researchers are exploring different techniques, such as adsorption, photocatalytic degradation, and electrolysis. Novel materials are also being sought. In particular, biopolymers like guar gum and xanthan gum, that are eco-friendly, non-toxic, reusable, abundant and cost-effective, have enormous potential. Gum-based nanocomposites can be prepared and used for removing heavy metals and colored dyes by adsorption and degradation, respectively. This review explains the significance of gum-based nanomaterials in waste water treatment, including preparative steps, characterization techniques, kinetics models, and the degradation and adsorption mechanisms involved. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
41. Synthesis and characterization of tungsten trioxide (WO3) as photocatalyst against wastewater pollutants
- Author
-
Ali Aldrees, Hayat Khan, Abdulaziz Alzahrani, and Salisu Dan’azumi
- Subjects
WO3 ,Photocatalysis ,Waste water treatment ,Industrial pollutants ,Visible light ,Water supply for domestic and industrial purposes ,TD201-500 - Abstract
Abstract In this work, crash precipitation technique was employed to synthesize a visible light-responsive tungsten trioxide (WO3) photocatalyst using ammonium paratungstate as tungsten precursor. The spray-dried (120 °C) and calcined (600 °C) WO3 powder was characterized by analyzing methods of XRD, PSD, BET and BJH, Raman, FESEM/EDX, FTIR, UV–vis DRS and XPS spectroscopy. X-ray diffraction (XRD) and Raman studies confirm the well crystalline monoclinic crystal structure. Scanning electron microscopy (SEM) images showed micron-sized spherical bulks of WO3 particles with needle-like morphology. A normal distribution with a d 50 (median diameter) value of 6.0 μm was observed with particle size analysis. Much enhanced BET surface area of 102 g/m2 with wide pore size 1.8 nm is measured compared to commercially available WO3 that results in increased pollutants surface adsorption. Fourier transform infrared spectroscopy (FTIR) study demonstrated that the calcined sample surface is enriched with bonded hydroxyl groups, beneficial for powder particles activity. Photocatalyst band gap was calculated by considering the absorbance measurements recorded on UV–vis diffuse reflectance spectroscopy (DRS). The energy value of 2.6 eV was calculated which lies in the visible light region while X-ray photoelectron spectroscopy (XPS) analysis showed 6 + oxidation state for tungsten. Bulk WO3 sphere photocatalytic activity was evaluated through the exertion of synthetic textile methylene blue (MB) dye and sulfamethoxazole (SMX) pharmaceutical antibiotic. The obtained activity results showed 85% and 100% degradation for MB and SMX under 100 min visible light irradiation. We expect that our work may provide a new sample for energy production (H2) through water photolysis, gas sensing and soft matter research.
- Published
- 2023
- Full Text
- View/download PDF
42. Graphene family nanomaterials as emerging sole layered nanomaterials for wastewater treatment: Recent developments, potential hazards, prevention and future prospects
- Author
-
Abhijeet Ojha, Samriti, Sahil Thakur, and Jai Prakash
- Subjects
Graphene oxide ,Adsorption ,Photocatalysis ,Antibacterial activities ,Hazardous effect ,Waste water treatment ,Environmental sciences ,GE1-350 - Abstract
Layered carbon nanomaterials (LCNs) are interesting topic of research owing to their compelling applications in diverse fields, simple preparation methods, and several exciting traits. In LCNs, graphene family nanomaterials (GFNs) i.e. graphene, graphene oxide (GO), and reduced graphene oxide (rGO) are highly exploited in recent years due to their planer morphology rendering extraordinarily high surface area (∼2600m2/g), amphiphilic nature, tunable optical and electrical properties, and rich surface oxy-functionalities (as in GO). Owing to these factors, GFNs have been emerged as the sole multifunctional layered nanomaterial with high potential of tailoring its properties through simple doping (n or p-type) and replacing metal based nanomaterials for various catalytic and adsorption-based environmental remediation strategies. In order to summarize the latest advancements, applications, potential benefits, risks, assessment of limitations, and challenges related to these materials, a well-crafted comprehensive review article is very valuable resource for researchers, and policymakers working towards environmental sustainability. Additionally, a review article on layered carbon nanomaterials for environmental applications is significant to bridge the gap between academia and industry by shedding light on the scalability, cost-effectiveness, and commercial viability of LCNs, facilitating their translation from the laboratory to real-world applications. The presented review article thoroughly discusses the morphological, structural, and chemical features of GFNs which enables them to adsorb both cationic and anionic organic contaminants in superlative manners. Additionally, several emerging applications of such GFNs as a sole nanomaterials in form of excellent adsorbents (for various species), photocatalysts, antibacterial agents, and as sensing materials mainly in water treatment are thoroughly discussed. In addition to this, the presented review also articulates a potential hazard associated with the subsequent recovery process of the employed dye/chemical adsorbed GFNs during adsorption or photodegradation processes. The current review summarizes all such recent efforts of environmental remediation using sole GFNs in details. Apart from that, the review article also suggests the future trends exploring the wide range of types and applications of these materials.
- Published
- 2023
- Full Text
- View/download PDF
43. Architecting the Z-scheme heterojunction of Gd2O3/g-C3N4 nanocomposites for enhanced visible-light-induced photoactivity towards organic pollutants degradation.
- Author
-
Rao, Vikrant Singh, Sharma, Rishabh, Paul, Devina Rattan, Almáši, Miroslav, Sharma, Anshu, Kumar, Suresh, and Nehra, Satya Pal
- Subjects
POLLUTANTS ,LIGHT absorption ,X-ray photoelectron spectroscopy ,METHYLENE blue ,TRANSMISSION electron microscopy ,GADOLINIUM ,PHOTOLUMINESCENCE - Abstract
A basic calcination process in one step was employed to create g-C
3 N4 photocatalytic composites modified by Gd2 O3 nanoparticles. SEM (scanning electron microscopy), FTIR (Fourier-transform infrared spectroscopy), XRD (X-ray diffraction), EIS (electrochemical impedance spectroscopy), PL (photoluminescence studies) as well as TEM (transmission electron microscopy), XPS (X-ray photoelectron spectroscopy), and CV (cyclic voltammetry) were employed to explain the structural traits, optical properties, and morphological features of the processed photocatalyst. The findings show that Gd2 O3 (Gd) does not affect the sample's crystalline structure but rather increases g-C3 N4 surface area by spreading it superficially. Furthermore, Gd can redshift the light absorption peak, reduce the energy gap, and improve the efficiency with which photogenerated holes and electrons are removed in g-C3 N4 . The surface morphology of g-C3 N4 , in particular, could be significantly enhanced. We similarly employed three distinct photocatalytic complexes of Gd2 O3 and g-C3 N4 in 1:1, 2:1, and 3:1 proportions to degrade methylene blue (MB). After 100 min in visible light (400–800 nm), the photodegradation rate of composites is 58.8% for 1:1 (GG1), 94.5% for 2:1 (GG2), and 92% for 3:1 (GG3). In addition to the MB dye, the photocatalytic activity of synthesized materials was also studied for methyl orange. The result shows phenomenal degradation values, i.e.; for GG1 86%, GG2 96%, and for GG3 84.6%. The narrow band gap that separates the photogenerated electron and hole enhances g-C3 N4 ability to degrade photo-catalytically. From the result, we concluded that the photocurrent and cyclic photocatalytic degradation of methylene blue shows that a composition of 2:1 Gd2 O3 /g-C3 N4 has high photocatalytic stability. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
44. 磁性纳米颗粒表面功能化修饰及其在 污水处理中的应用进展.
- Author
-
杨皓然, 牛乾乾, 郭今锴, 张振宇, and 曹 宏
- Subjects
MAGNETIC nanoparticles ,WASTEWATER treatment ,MAGNETIC materials ,SEWAGE ,MAGNETICS - Abstract
Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing 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
- 2023
- Full Text
- View/download PDF
45. 2D–2D g-C3N5/Bi24O31Br10 S-scheme nanostructures with increased photocatalytic efficiency for crystal violet removal.
- Author
-
Sharma, Jayati, Dhiman, Pooja, Kumar, Amit, Dawi, Elmuez A., Rana, Garima, and Sharma, Gaurav
- Subjects
- *
GENTIAN violet , *INDUSTRIAL wastes , *IRRADIATION , *CHARGE transfer , *ORGANIC dyes , *RESOURCE exploitation , *PHOTOVOLTAIC power systems - Abstract
Significant ecosystem damage and severe environmental issues have surfaced due to unplanned exploitation of resources and industrial expansion. The water bodies are continuously polluted by numerous organic dyes released from industrial effluents. In this work, we report construction of new g-C 3 N 5 /Bi 24 O 31 Br 10 S-scheme heterojunction for UV–visible light driven superior organic dye degradation. The integrated heterojunction with high interfacial charge transfer exhibited excellent 99.08% (∼100%) within 60 min exposure which is manifolds higher than bare g-C 3 N 5 and Bi 24 O 31 Br 10. The mechanistic investigations showed that the key active radicals in photocatalytic CV degradation are the •O 2 - and h+. Building an S-scheme model with favourable energy band structure encourages efficient separation of charges while maintaining the inherent redox capacity of the g-C 3 N 5 /Bi 24 O 31 Br 10 catalyst, which is highly beneficial for superior photocatalytic performance. This work offers a fresh viewpoint for creating organic-inorganic hybrid new S-scheme heterojunctions for high performance photocatalytic waste-water treatment. • High efficiency 2D–2D g-C 3 N 5 /Bi 24 O 31 Br 10 S-scheme heterojunction was designed. • Catalyst exhibit excellent degradation efficiency of 99.08% for CV removal. • PL suggests the efficient charge separation of the carriers. • ·O 2 - and h+ are responsible for CV degradation. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
46. Synthesis and characterization of tungsten trioxide (WO3) as photocatalyst against wastewater pollutants.
- Author
-
Aldrees, Ali, Khan, Hayat, Alzahrani, Abdulaziz, and Dan'azumi, Salisu
- Subjects
TUNGSTEN trioxide ,POLLUTANTS ,METHYLENE blue ,FOURIER transform infrared spectroscopy ,X-ray photoelectron spectroscopy ,PRECIPITATION (Chemistry) ,REFLECTANCE spectroscopy - Abstract
In this work, crash precipitation technique was employed to synthesize a visible light-responsive tungsten trioxide (WO
3 ) photocatalyst using ammonium paratungstate as tungsten precursor. The spray-dried (120 °C) and calcined (600 °C) WO3 powder was characterized by analyzing methods of XRD, PSD, BET and BJH, Raman, FESEM/EDX, FTIR, UV–vis DRS and XPS spectroscopy. X-ray diffraction (XRD) and Raman studies confirm the well crystalline monoclinic crystal structure. Scanning electron microscopy (SEM) images showed micron-sized spherical bulks of WO3 particles with needle-like morphology. A normal distribution with a d50 (median diameter) value of 6.0 μm was observed with particle size analysis. Much enhanced BET surface area of 102 g/m2 with wide pore size 1.8 nm is measured compared to commercially available WO3 that results in increased pollutants surface adsorption. Fourier transform infrared spectroscopy (FTIR) study demonstrated that the calcined sample surface is enriched with bonded hydroxyl groups, beneficial for powder particles activity. Photocatalyst band gap was calculated by considering the absorbance measurements recorded on UV–vis diffuse reflectance spectroscopy (DRS). The energy value of 2.6 eV was calculated which lies in the visible light region while X-ray photoelectron spectroscopy (XPS) analysis showed 6 + oxidation state for tungsten. Bulk WO3 sphere photocatalytic activity was evaluated through the exertion of synthetic textile methylene blue (MB) dye and sulfamethoxazole (SMX) pharmaceutical antibiotic. The obtained activity results showed 85% and 100% degradation for MB and SMX under 100 min visible light irradiation. We expect that our work may provide a new sample for energy production (H2 ) through water photolysis, gas sensing and soft matter research. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
47. Study of adsorption of cadmium ions from solutions on natural and modifi ed diatomites
- Author
-
Boriskov, Dmitry E., Efremova, Sania Yu., and Komarova, Nadezhda А.
- Subjects
adsorption ,diatomite ,modifi cation ,waste water treatment ,heavy metal ions ,cadmium ,Biology (General) ,QH301-705.5 - Abstract
The search for new technologies for the purification of natural and waste water does not lose its relevance. Biologically, heavy metals are among the most dangerous pollutants. The highest toxicity among them has cadmium, causing serious environmental problems during technogenic pollution of the aquatic environment, and its extraction is an urgent task. The analysis of foreign studies on the extraction of cadmium ions is carried out. The adsorption of cadmium has been studied by many authors and described in many works on kaolin oxides / iron hydroxides, in contrast to siliceous rocks. In this work, the use of the sorption method is proposed for the purification of wastewater from ions of heavy metals. The aim was to study the sorption activity of diatomite in relation to cadmium ions. The studies have been carried out under static conditions. The processes of physicochemical modification of diatomite for the extraction of cadmium ions from aqueous solutions have been investigated. The influence of time and pH on the value of sorption has been studied. The optimal conditions for sorption extraction have been determined. Adsorption isotherms have been constructed, and quantitative characteristics of the values of adsorption of cadmium ions on the surface of modified sorbents have been obtained. The fundamental possibility of using diatomites for the purification of cadmium-containing wastewater has been assessed. Based on the data obtained, it can be concluded that acid activation does not promote adsorption (even negative adsorption is observed), which confirms the mobility of cadmium in the low pH region, it can be assumed that only an increase in alkalinity to the possibility of formation of hydroxocadmium (CdOH)+. Thermal, shows stable adsorption in relation to Cd+2, which suggests the possibility of using such activation of cadmium diatomite and other metals, that is, with complex pollution.
- Published
- 2023
- Full Text
- View/download PDF
48. Advancements in Photocatalytic Applications of Metal Ferrites for Water Pollution Remediation: A Focus on Biosynthesis and Innovations
- Author
-
Namisha, Jindal, Neha, Kumar, Vineet, and Singh, Kulvinder
- Published
- 2024
- Full Text
- View/download PDF
49. Carbon Nanotubes Applications in Agriculture
- Author
-
Mathew, Silvy, Victório, Cristiane P., Abraham, Jiji, editor, Thomas, Sabu, editor, and Kalarikkal, Nandakumar, editor
- Published
- 2022
- Full Text
- View/download PDF
50. Biochar: A Sustainable Approach Towards Environmental Remediation
- Author
-
Jha, Stuti, Patel, Jinal, Shahabuddin, Syed, Gaur, Rama, Ghosh, Arindam, Series Editor, Chua, Daniel, Series Editor, de Souza, Flavio Leandro, Series Editor, Aktas, Oral Cenk, Series Editor, Han, Yafang, Series Editor, Gong, Jianghong, Series Editor, Jawaid, Mohammad, Series Editor, Mukherjee, Kalisadhan, editor, Layek, Rama Kanta, editor, and De, Debasis, editor
- Published
- 2022
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.