9 results on '"Yang, Huo"'
Search Results
2. Role of naphthaleneacetic acid in the degradation of bisphenol A and wastewater treatment by microalgae: Enhancement and signaling
- Author
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Zhenhao, Zhao, Huiwen, Yang, Zhixuan, Feng, Yang, Huo, Liang, Fu, and Dandan, Zhou
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,Carbohydrates ,Public Health, Environmental and Occupational Health ,Starch ,General Medicine ,General Chemistry ,Wastewater ,Lipids ,Pollution ,Antioxidants ,Naphthaleneacetic Acids ,Water Purification ,Phenols ,Plant Growth Regulators ,Microalgae ,Environmental Chemistry ,Biomass ,Benzhydryl Compounds ,Mitogen-Activated Protein Kinases ,Chlorella vulgaris - Abstract
Coupling microalgae cultivation with wastewater treatment is a promising environmentally sustainable development strategy. However, toxics such as Bisphenol A (BPA) in wastewater damage microalgae cells and reduces bioresources production. Phytohormone regulation has the potential to solve this issue. However, phytohormone research is still in its infancy. In this work, 0.2 μM naphthyl acetic acid (NAA) significantly enhanced Chlorella vulgaris BPA detoxification by 127.3% and Chlorella biomass production by 46.4%. NAA helps Chlorella convert bisphenol A into small non-toxic intermediates by enhancing the expression of associated enzymes. Simultaneously, NAA promoted carbon fixation and photosynthetic metabolism. Activation of the mitogen-activated protein kinase (MAPK) pathway strengthened the downstream antioxidant system while improving photosynthesis and intracellular starch and lipid synthesis. Carbohydrates, pigment, and lipid production was significantly enhanced by 20.0%, 46.9%, and 21.8%, respectively. A new insight is provided into how phytohormones may increase microalgae in wastewater's bioresource transformation and toxicity resistance.
- Published
- 2022
3. Photolysis of free chlorine and production of reactive radicals in the UV/chlorine system using polychromatic spectrum LEDs as UV sources
- Author
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Zhuo Chen, Yin-Hu Wu, Zheng-Yang Huo, Yun Lu, Qian-Yuan Wu, Hong-Ying Hu, and Guo-Qiang Li
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Environmental Engineering ,Ultraviolet Rays ,Health, Toxicology and Mutagenesis ,Radical ,chemistry.chemical_element ,Quantum yield ,medicine.disease_cause ,Photochemistry ,law.invention ,Water Purification ,Absorbance ,law ,Chlorine ,medicine ,Environmental Chemistry ,Photolysis ,Photodissociation ,Advanced oxidation process ,Public Health, Environmental and Occupational Health ,General Medicine ,General Chemistry ,Pollution ,chemistry ,Oxidation-Reduction ,Ultraviolet ,Water Pollutants, Chemical ,Light-emitting diode - Abstract
Recently, ultraviolet light-emitting diodes (UV-LEDs) and chlorine combined system has been employed as an emerging advanced oxidation process. However, UV-LEDs were commonly considered as monochromatic UV sources. In this study, the obvious quantum yields of chlorine photolysis under 265 nm and 280 nm LEDs irradiations were investigated with treating LEDs as polychromatic UV sources. Particularly, Φobs-poly of HOCl and OCl⁻ for 265 nm LED were found to be 1.50 and 0.70 mol E−1, respectively, whereas Φobs-poly of HOCl and OCl⁻ for 280 nm LED were 1.28 and 0.64 mol E−1, respectively. It was identified that Φobs-poly were 5.66–14.63 % lower than Φobs-mono. This suggests that obvious quantum yield using peak emission wavelength would overestimate the true quantum yield. The production of radical species in LED UV/chlorine systems were determined by the degradation of BA, and illustrated by a mathematical model. Different trends were observed for 265 nm and 280 nm LED UV/chlorine systems as pH increased from 5.0 to 10.0. As pH increased, the formation of OH continuously decreased in both 265 nm and 280 nm LED systems. The formation of Cl increased at neutral pH and more Cl and OH were formed due to the higher molar absorbance coefficient at 280 nm. The chlorine dose-dependent effects on radical productions at pH of 5.0, 7.5 and 10.0 were also assessed. At pH of 5.0, OH was the main radical product and had linear correlation with chlorine dose. At pH of 7.5, the productions of OH and Cl showed similar profiles that increased rapidly at low chlorine dosage and then slowed down.
- Published
- 2021
4. Polyoxometalate@g-C
- Author
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Yang, Huo, Lihui, Zhang, Shengtian, Wang, and Xianze, Wang
- Subjects
Light ,Tungsten Compounds ,Catalysis ,Nanocomposites - Abstract
The prepared g-C
- Published
- 2021
5. Nano-Fe
- Author
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Jing-Yi, Zhang, Hang, Zhou, Peng, Zeng, Shi-Long, Wang, Wen-Jun, Yang, Fang, Huang, Yang, Huo, Shu-Ning, Yu, Jiao-Feng, Gu, and Bo-Han, Liao
- Subjects
Soil ,Charcoal ,Iron ,Soil Pollutants ,Oryza ,Plant Roots ,Cadmium - Abstract
Rice as a paddy field crops, iron-containing materials application could induce its iron plaque formation, thereby affecting cadmium (Cd) transportation in the rhizosphere and its uptake in root. In this study, a hydroponic experiment was conducted to investigate the effects of three exogenous iron materials, namely nano-Fe
- Published
- 2021
6. Polyoxometalate@g-C3N4 nanocomposite for enhancing visible light photoelectrocatalytic performance
- Author
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Yang Huo, Shengtian Wang, Lihui Zhang, and Xianze Wang
- Subjects
Environmental Engineering ,Materials science ,Nanocomposite ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,Public Health, Environmental and Occupational Health ,02 engineering and technology ,General Medicine ,General Chemistry ,010501 environmental sciences ,01 natural sciences ,Pollution ,020801 environmental engineering ,Catalysis ,Chemical engineering ,Polyoxometalate ,Photocatalysis ,Environmental Chemistry ,Degradation (geology) ,0105 earth and related environmental sciences ,Visible spectrum - Abstract
The prepared g-C3N4 under morphology controlling shows better physic and chemical performance. The synergistic effect of POM and g-C3N4 in the hybrid improves its high photocatalytic capability. The research indicates that g–C3N4–based material is a potential photoelectrode for PEC degradation. Besides, the PMoV nanocomposite shows better activities in the PEC and removal efficiency of RhB. Compared with the same PEC system, the degradation time of RhB is shorter and the degradation efficiency is higher for the MCN/PMoV catalysts.
- Published
- 2021
7. Nano-Fe3O4-modified biochar promotes the formation of iron plaque and cadmium immobilization in rice root
- Author
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Shi-Long Wang, Shu-Ning Yu, Bo-Han Liao, Jing-Yi Zhang, Jiao-Feng Gu, Hang Zhou, Fang Huang, Wen-Jun Yang, Peng Zeng, and Yang Huo
- Subjects
Environmental Engineering ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,chemistry.chemical_element ,Chromosomal translocation ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Ferrous ,chemistry.chemical_compound ,Biochar ,Environmental Chemistry ,Chelation ,Food science ,Sulfate ,0105 earth and related environmental sciences ,Rhizosphere ,Cadmium ,Public Health, Environmental and Occupational Health ,food and beverages ,General Medicine ,General Chemistry ,Pollution ,020801 environmental engineering ,chemistry ,Paddy field - Abstract
Rice as a paddy field crops, iron-containing materials application could induce its iron plaque formation, thereby affecting cadmium (Cd) transportation in the rhizosphere and its uptake in root. In this study, a hydroponic experiment was conducted to investigate the effects of three exogenous iron materials, namely nano-Fe3O4-modified biochar (BC–Fe), chelated iron (EDTA-Fe), and ferrous sulfate (FeSO4), on the iron plaque formation on the surface of rice root, and to investigate the effects of formed iron plaque on the absorption, migration, and transportation of Cd and Fe in rice plant. The results showed that yellow-brown and brown iron plaque was formed on surface cells of the Fe-treated rice root, and some black particles were embedded in the iron plaque formed by BC-Fe. The proportion of crystallized iron plaque (31.8%–35.9%) formed by BC-Fe was much higher than that formed by EDTA-Fe and FeSO4. The Cd concentrations in the crystallized iron plaque formed by BC-Fe were 7.64–13.0 mg·kg−1, and increased with the increasing of Fe concentrations in the plaque. The Cd translocation factor from root to stem (TFr-s) and the Cd translocation factor from stem to leaf (TFs-l) with BC-Fe treatment decreased by 84.7% and 80.0%, respectively. The results demonstrated that application BC-Fe promoted the formation of iron plaque and enhanced the sequestration of Cd and Fe in roots, thus reduced the transportation and accumulation of Cd in aerial rice tissues.
- Published
- 2021
8. Combination of catalytic ozonation by regenerated granular activated carbon (rGAC) and biological activated carbon in the advanced treatment of textile wastewater for reclamation
- Author
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Qian-Yuan Wu, Hong-Ying Hu, Zheng-Yang Huo, Chun Wang, Wen-Long Wang, Huixiang Shi, Xin Liu, and Tian-Hui Zhou
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,chemistry.chemical_element ,02 engineering and technology ,010501 environmental sciences ,Wastewater ,01 natural sciences ,Waste Disposal, Fluid ,Catalysis ,Water Purification ,Ozone ,medicine ,Environmental Chemistry ,Coloring Agents ,Effluent ,0105 earth and related environmental sciences ,Textiles ,Public Health, Environmental and Occupational Health ,General Medicine ,General Chemistry ,Biodegradation ,Pulp and paper industry ,Pollution ,Acute toxicity ,020801 environmental engineering ,Biodegradation, Environmental ,chemistry ,Charcoal ,Textile Industry ,Water treatment ,Dyeing ,Carbon ,Water Pollutants, Chemical ,Activated carbon ,medicine.drug - Abstract
Wastewater reclamation in the textile industry has attracted considerable attention. In this study, catalytic ozonation by regenerated granular activated carbon (rGAC) and its combination with biological activated carbon (BAC) was investigated for the reclamation of a real bio-treated dyeing and finishing wastewater (BDFW). Catalytic ozonation by rGAC (O3/rGAC) was 1.6–2.0 times more efficient than ozonation alone for pollutants degradation. Although iron oxide loaded rGAC (rGAC-Fe) improved the performance of catalytic ozonation by 14%–25%, but was labile ( 20 days). Catalytic ozonation improved the generation of •OH, contributing 1.1–1.7 times faster of chromophores decomposition and 0.24–0.55 times more increase of biodegradability than ozonation. However, catalytic ozonation increased the acute toxicity of BDFW by two times. The combination of O3/rGAC and BAC can synergistically reduce COD, chromophores, and color in BDFW during 45-day's continuous operation, the improvements than O3/rGAC being 21.0%, 18.8%, and 13.6%, respectively. Moreover, although O3/rGAC of BDFW increased the toxicity from 98.3 to 146.5 μg-HgCl2/L, post BAC significantly reduced the toxicity to 13.1 μg-HgCl2/L. Engineering practice of water reclamation by O3/rGAC-BAC was approved to be feasible based on both the water quality of treated water and the operation cost.
- Published
- 2019
9. Impact of secondary effluent from wastewater treatment plants on urban rivers: Polycyclic aromatic hydrocarbons and derivatives
- Author
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Dongqing Liu, Zhuorong Li, Xu Zhao, Yaohui Bai, Wei Cao, Meng Qiao, and Yang Huo
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Environmental Engineering ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,Population ,Coal combustion products ,02 engineering and technology ,010501 environmental sciences ,Wastewater ,Urban area ,01 natural sciences ,Population density ,Rivers ,Environmental Chemistry ,Polycyclic Aromatic Hydrocarbons ,education ,Effluent ,0105 earth and related environmental sciences ,geography ,education.field_of_study ,geography.geographical_feature_category ,Public Health, Environmental and Occupational Health ,General Medicine ,General Chemistry ,Pollution ,020801 environmental engineering ,Environmental chemistry ,Environmental science ,Sewage treatment ,Water quality ,Water Pollutants, Chemical ,Environmental Monitoring - Abstract
The growing population in urban area impacted the water quality of the urban rivers receiving treated municipal wastewater. Polycyclic aromatic hydrocarbons (PAHs) and their derivatives (SPAHs) are corresponding to the population density. In this study, the concentrations of 16 PAHs and 17 SPAHs, including 4 methyl PAHs (MPAHs), 4 oxygenated PAHs and 9 chlorinated PAHs were investigated in the major urban rivers receiving the effluent from 5 major wastewater treatment plants (WWTPs) in the mega city Beijing. The concentrations of ΣSPAHs (307 ± 68 ng/L) were similar to ΣPAHs (321 ± 92 ng/L) in the total phase (aqueous + particulate) suggesting that SPAHs in the urban rivers should be taken into consideration. The lower concentrations of ΣPAHs and ΣMPAHs in this study than the wastewater receiving rivers and WWTPs effluent previously (2010–2013), as well as the lower concentration in the heating seasons than the non-heating season in the investigated year implied the reduction of coal combustion for heating and power generation in recent years. Although WWTPs effluent was theoretically the only source to the urban rivers in the investigated season, April and November, PAHs and SPAHs in most rivers were demonstrated to be originated from other unknown sources besides the WWTPs effluent. The reduction from the original source, coal combustion (33% and 30%), was more efficient than from the wastewater treatment upgrading (15%) for the reduction of PAHs and SPAHs in the urban rivers.
- Published
- 2017
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