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SSRN 2025年

作者： Lin, Can-Yuan Liua, Ze-Hua Luo, Dong-Hao Wang, Xiao-Zhan Gong, Jian Sun, Jin-Yi Dang, Zhi School of Environment and Energy South China University of Technology Guangdong Guangzhou510006 China Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education School of Environmental Science and Engineering Guangzhou University Guangzhou510006 China Key Lab Pollution Control & Ecosystem Restoration in Industry Cluster Ministry of Education Guangdong Guangzhou510006 China Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling Guangdong Guangzhou510006 China

Estrogens, particularly the understudied metabolites 2OHE1, 4OHE1, and 16ketoE2, pose ecological and health risks in poultry, a vital food source. This study developed a GC-MS assay to detect 12 natural estrogens in poultry blood and meat. Detection limits were 0.6 to 2.2 ng/mL in blood and 0.6 to 1.4 ng/g in meat, with recovery rates from 86% to 119%. Estrogen levels in blood varied from 125 ng/mL in shelducks to 173.64 ng/mL in white-feathered chickens, while in meat, they ranged from 13.6 ng/g in yellow-feathered chickens to 17.5 ng/g in pale geese. The environmental equivalent (EEQ) for E1, E2, E3, and αE2 surpassed safety thresholds. The inclusion of eight understudied estrogens raised health risk by 78%, increasing the mean EEQ to 1.52 for meat and 0.57 for blood. These results emphasize the need for more research on these metabolites in poultry. © 2025, The Authors. All rights reserved.

关键词： Metabolites

V-Modified MnCo2O4.5 Spinel Catalyst for the Synergistic Removal of Nox and Vocs from Coke Oven Flue Gas: Mechanism and Performance Study

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SSRN 2024年

作者： Chen, Zimo Zhao, Cheng Yun, Junge Chu, Rencheng Zheng, Han Feng, Xin Tong, Zhangfa Chen, Zhihang Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical Engineering Guangxi University Nanning530004 China Guangdong Key Lab of Water & Air Pollution Control Guangdong Province Engineering Laboratory for Air Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China College of Environment and Resources Xiangtan University Xiangtan China

A dual-function catalyst, designated as V0.5Mn5Co5, has been constructed for the synergistic removal of NOx and volatile organic compounds under coke-oven flue gas conditions. The V0.5Mn5Co5 catalyst has more than 95% NOx conversion at 180-300 °C and removes 70% of ethylene at 240 °C. Besides it has excellent sulfur resistance. The catalyst satisfies the requirements of the procedure for denitrifying coking flue gas. Vanadium (V) prevents the transition dehydrogenation and oxidation of NH3 by reducing the Lewis acidic sites of the catalyst and thus inhibiting the generation of surface reactive oxygen species. NOx removal was enhanced by increasing its Brønsted acid sites. Mechanistic studies showed that the catalysts mainly perform SCR reaction through E-R mechanism, and N2O is generated through the transition dehydrogenation of NH3 and NSCR reaction. Ethylene(C2H4) oxidation followed the MvK mechanism, and there was a competitive adsorption of NH3 with C2H4, and there was a mutual inhibition between the SCR reaction and the ethylene oxidation reaction. Commercial medium and low temperature SCR catalysts are almost ineffective in the oxidation of VOCs in coking flue gas, but V0.5Mn5Co5 exhibits excellent synergistic removal of NOx and VOCs in coke oven flue gas, which indicating great promise for industrial application. © 2024, The Authors. All rights reserved.

关键词： Nitrogen oxides

Methane Production Improvement in Anaerobic Wastewater Treatment by Conductive Zero-Valent Iron@Carbon@Polyaniline

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SSRN 2022年

作者： Zhou, Na Zhou, Jie Huang, Wen Qian, Hu Qiu, Bin Beijing Key Laboratory for Source Control Technology of Water Pollution Beijing Forestry University Beijing100083 China Collage of Environmental Science and Engineering Beijing Forestry University Beijing100083 China

In this study, a core-shell type ZVI@C@PANI nanoparticle had been prepared and was used as a novel conductive medium for electron transfer between bacteria and aechaea of the anaerobic system. The synthsized nanocomposit had a favorable biocompatibility and a conductivity of 4.89 S/cm, which made nanocomposite a good transfer medium to achieve efficient methane production. Thus, the enhanced methane production by adding ZVI@C@PANI in the anaerobic sludge had been investigated. When the dosage of ZVI@C@PANI reached 2 g/L, it could enjoy the best effect of promoting methane production. The methane production increased by 71.36% from the anaerobic system added with the ZVI@C@PANI compared to the control system. As a result, the information of microorganism community and enzymes in the anaerobic sludge were detected. The results showed that the Geobacter , Syntrophus and Dechlorobacter bacteria and the Methanosaeta and Methanobacterium archaea were significantly enriched for facilitating direct interspecies electron transfer in the anaerobic system by added ZVI@C@PANI. Moreover, the ZVI@C@PANI can strengthen the production of acetic acid, which facilitated the acetoclastic methanogens to generate methane from the anaerobic system. © 2022, The Authors. All rights reserved.

关键词： Carbon

Probing the Catalytic Oxidation of Styrene on Co3o4 With Different Morphologies: Promotion by Oxygen Vacancies

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SSRN 2024年

作者： Chu, Rencheng Zhao, Cheng Yun, Junge Chen, Zimo Zheng, Han Zhao, Yanhong Feng, Xin Tong, Zhangfa Chen, Zhihang Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology School of Chemistry and Chemical Engineering Guangxi University Nanning530004 China Guangdong Key Lab of Water & Air Pollution Control Guangdong Province Engineering Laboratory for Air Pollution Control South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China College of Environment and Resources Xiangtan University Xiangtan China

In this paper, three Co3O4 catalysts with different morphologies (nanoparticulate, layered, and cubic) were synthesized to control the concentration of oxygen vacancies and applied to the catalytic oxidation of styrene, and the nanoparticulate Co3O4 (Co3O4-N), which has the smallest specific surface area (38.0240 m²/g), showed the best catalytic performance (T100=247 °C). Based on various characterization data, the analysis was carried out, and the results showed that the physical structural properties are not the key factor determining the catalytic activity, and more excellent chemical properties such as oxygen vacancies determine the catalytic activity. Finally, the reaction process of styrene adsorption oxidation and the degradation of key intermediates of the reaction were investigated by in situ DRIFTS technique, which demonstrated that a high concentration of oxygen vacancies can accelerate the oxidation of important intermediates, simplify the whole styrene oxidation process, and produce fewer by-products. © 2024, The Authors. All rights reserved.

关键词： Catalytic oxidation

Maximizing the Utilization of Single-Atom Sites on Carbon-Based Catalysts for Efficient Co2 Electroreduction with Ultrahigh Turnover Frequency

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SSRN 2022年

作者： Liang, Shuyu Zhang, Tianyu Zheng, Yue Xue, Tianshan Wang, Zheng Wang, Qiang He, Hong Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Institute of Atmospheric Environment Chinese Research Academy of Environmental Sciences Beijing100012 China Laboratory of Atmospheric Environment and Pollution Control Research Center for EcoEnvironmental Sciences Chinese Academy of Sciences Beijing100085 China

Increasing the amount of accessible active sites to reactants is an effective approach to enhance catalytic activity. Although single-atom catalysts are claimed to be capable of achieving 100% atomic utilization, there may be abundant single-atom sites buried and inaccessible to reactants in practice. Herein, two Ni, N-doped carbon catalysts with Ni-N4 sites are studied for CO2 electroreduction. In contrast to the Ni-N4/Carbon nanosheets with Ni loading of 2.42 wt%, the Ni-N4/Carbon black with lower Ni loading of 0.16 wt% excitingly exhibits higher activity for CO production. The atomically dispersed Ni-N4 sites over carbon black surface benefits the exposure and utilization of single-atom sites, leading to a significant increase of TOF from 2140 to 100347 h−1. Particularly, an extraordinarily high current density exceeding 200 mA cm-2 with CO selectivity up to ~100% are achieved for Ni-N4/CB in flow cell. This work demonstrates the significance of increasing single-atom sites utilization © 2022, The Authors. All rights reserved.

关键词： Carbon dioxide

Reclaimed water application to vegetation restoration in mining area: Determination of water quality standards and optimization of moderate treatment technology

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Reclaimed water application to vegetation restoration in min...

作者： Le Chen Kai Sun Panyue Zhang Zhen Zhang Jinsong Liang Yajing Cai Beijing Key Lab for Source Control Technology of Water Pollution Beijing Forestry University School of Environment and Natural Resources Renmin University of China

water shortage severely restricts vegetation restoration of mining area in the northwest China. Moderate treatment of reclaimed water is essential for improving the local ecological environment. In this study, relevant water quality standards issued by the states and research results were comprehensively considered to propose a reclaimed water quality standard suitable for vegetation restoration of mining area. The available domestic sewage and mine water was moderately treated by hybrid biological reactor system and nanofiltration membrane system, respectively. The effluent quality meet the requirement of reclaimed water quality standards in this study. This study provides theoretical support for vegetation restoration of mining area.

关键词： Reclaimed water application to vegetation restoration in mining area Determination of water quality standards and optimization of moderate treatment technology

Enhancing Nitrate Removal Efficiency of Micro-Sized Zero-Valent Iron by Chitosan Gel Balls Encapsulating

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SSRN 2021年

作者： An, Facai Feng, Xianlu Dang, Yan Sun, Dezhi College of Environmental Science and Engineering Beijing Forestry University Beijing Key Laboratory for Source Control Technology of Water Pollution Engineering Research Center for Water Pollution Source Control and Eco-remediation Beijing Forestry University Beijing100083 China

The activity of micro-sized zero-valent iron (MZVI) material for nitrate removal in neutral pH and low C/N ratios water needs to be improved. In this study, micro-sized zero-valent iron@chitosan (MZVI@CS) material was synthesized through embedding MZVI particles into chitosan (CS) gel by sol-gel method, and was used for deep removal of NO3-N in the absence of organic carbon sources and neutral pH. The NO3- -N removal rate of MZVI@CS was 0.37 mg-N·L-1·d-1 (dosage of 1%, initial pH = 7, 25 oC, initial nitrate concentration = 15 mg-N·L-1), which was 11.33 times higher than that of MZVI. The apparent activation energy (Ea) of MZVI@CS with nitrate was 38.23 kJ·mol-1 . MZVI@CS can remove nitrate effectively at a low concentration (15 mg-N·L-1). A stable denitration rate (0.37-2.28 mg-N·L-1·d-1) could be maintained under weak acidic, neutral and alkaline conditions (pH = 5-9). More than 80% of reduced nitrate was converted to N2 , and only a small amount was converted to NH4+ or NO2- . The gel structure of MZVI@CS eliminated the agglomeration between MZVI particles while the forming of Fe-CS chelates reduced the formation of iron oxide and solved the problems of passivation, hence successfully strengthened the NO3-N removal efficiency of MZVI. Therefore MZVI@CS has great application potential in NO3-N deep removal of water bodies with neutral pH and low C/N ratios. © 2021, The Authors. All rights reserved.

关键词： Nitrates

Chain Elongation Significantly Contributes to N-Butyrate Production in Anaerobic Fermentation of Food Waste Saccharified Residue: Effect of Substrate Content

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SSRN 2022年

作者： Wang, Qingyan Zhang, Guangming Chen, Le Yang, Nan Wu, Yan Fang, Wei Zhang, Ru Wang, Xinyi Fu, Chuan Zhang, Panyue Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Engineering Research Center for Water Pollution Source Control & Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China School of Energy & Environmental Engineering Hebei University of Technology Tianjin300130 China School of Environmental and Chemical Engineering Chongqing Three Gorges University Chongqing404632 China

In this study, food waste saccharified residue was used to produce volatile fatty acids (VFAs), and the effects of substrate content on VFA production, VFA composition, acidogenic efficiency, microbial community, and carbon transfer were investigated. Interestingly, chain elongation from acetate to n-butyrate played an important role with a substrate content of 200 g/L in the acidogenesis process. Results showed that 200 g/L was a suitable substrate content for both VFA and n-butyrate production, the highest VFA production, and n-butyrate composition were 280.87 mg COD/g VS and more than 90.00%, respectively, and VFA/SCOD reached 82.39%. Microbial analysis showed that Clostridium_Sensu_Stricto_12 promoted n-butyrate production by chain elongation. Carbon transfer analysis indicated that chain elongation made a contribution of 43.93% to n-butyrate production. Totally 38.47% of organic matter in food waste saccharified residue was further utilized. This study provides a new way for n-butyrate production with waste recycling and low cost. © 2022, The Authors. All rights reserved.

关键词： Substrates

Effects of acid,acid-ZVI/PMS,Fe(Ⅱ)/PMS and ZVI/PMS conditioning on the wastewater activated sludge(WAS)dewaterability and extracellular polymeric substances(EPS)

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Journal of Environmental Sciences 2020年第5期32卷 73-84页

作者： Xiaoyang Fan Yili Wang Daxin Zhang Yajie Guo Shihui Gao Enrui Li Huaili Zheng College of Environmental Science and Engineering Beijing Key Lab for Source Control Technology of Water PollutionBeijing Forestry UniversityBeijing 100083China Jinyun Forest Ecosystem Research Station Beijing Forestry UniversityBeijing 100083China Key Laboratory of the Three Gorges Reservoir Regions Eco-Environment State Ministry of EducationChongqing UniversityChongqing 400045China

The effects of four conditioning approaches:Acid,Acid-zero-valent iron(ZVI)/peroxydisulfate(PMS),Fe(Ⅱ)/PMS and ZVI/PMS,on wastewater activated sludge(WAS)dewatering and organics distribution in supernatant and extracellular polymeric substances(EPS)layers were *** highest reduction in bound water and the most WAS destruction was achieved by Acid-ZVI/PMS,and the optimum conditions were pH 3,ZVI dosage 0.15 g/g dry solid(DS),oxone dosage 0.07 g/g DS and reaction time 10.6 min with the reductions in capillary suction time(CST)and water content(Wc)as 19.67%and 8.49%,*** conditioning approaches could result in TOC increase in EPS layers and supernatant,and protein(PN)content in tightly bound EPS(TB-EPS).After conditioning,organics in EPS layers could migrate to ***(PS)was easier to migrate to supernatant than *** addition,Acid,Acid-ZVI/PMS or Fe(Ⅱ)/PMS conditioning promoted the release of some polysaccharides containing ring vibrations v P=O,v C-O-C,v C-O-P functional groups from *** spectra proved that both radicals of SO4-·and·OH contributed to dewatering and organics transformation and *** value of WAS positively correlated with the ratios of PN/PS in LB-EPS and total EPS,while it negatively correlated with TOC,PN content and PS content in TB-EPS,as well as PS content in supernatant and *** negatively correlated to zeta potential and TOC value,PN content,and HA content in supernatant.

关键词： Conditioning approaches Acid-ZVI/PMS Wastewater activated sludge dewaterability EPS Radicals Correlation

Reproductive toxicity of bisphenol A and nitro-bisphenol A in male zebrafish at environmentally relevant concentrations

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Science of the Total Environment 2025年 958卷 177905页

作者： Wang, Chao Zhang, Shuyi Shao, Zijin Sun, Peijie Zhang, Jiran Zhang, Shaoping Kong, Jian Zhi, Hong Li, Li Li, Mingshu Yu, Jie Liu, Zhenming Lu, Xiaobo Peng, Hui Tang, Song China CDC Key Laboratory of Environment and Population Health National Institute of Environmental Health Chinese Center for Disease Control and Prevention Beijing China Department of Toxicology School of Public Health China Medical University Shenyang China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Sciences & Engineering Beijing Forestry University Beijing China Center for Global Health School of Public Health Nanjing Medical University Jiangsu Nanjing China Department of Chemistry School of Environment University of Toronto TorontoON Canada State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical Sciences Peking University Beijing100191 China

Bisphenol A (BPA) is a well-known endocrine-disrupting pollutant that poses significant environmental challenges globally. However, the toxicity of nitro-BPA (NBPA), the primary transformation product of BPA, remains poorly understood. This study employs a multi-omics approach, integrating in silico and bioinformatics analyses, to investigate and compare the male reproductive toxicity of BPA and NBPA in male zebrafish exposed to environmentally relevant concentrations. After 21 days of exposure, we observed a significant increase in cumulative egg production over five days in the NBPA 200 nM group compared to pre-exposure levels. Conversely, the gonadosomatic index of NBPA 200 nM group was significantly reduced by approximately 41.65 %. Our findings indicate that the activation of ESRRγ and inhibition of NR5A2 are critical molecular initiating events linked to male reproductive toxicity. Additionally, both BPA and NBPA were found to disrupt several key events within the steroid hormone biosynthesis pathway. This disruption includes the downregulation of genes encoding cytochrome P450 (CYP450) and hydroxysteroid dehydrogenase enzymes, as well as alterations in the levels of steroid hormones such as cholesterol and 25-hydroxycholesterol. Our study identifies biomolecular targets of BPA and NBPA at environmentally relevant concentrations that induce reproductive toxicity, enhancing our understanding of NBPA toxicity and are anticipated to inform the development of effective mitigation strategies. © 2024 Elsevier B.V.

关键词： Male reproductive toxicity Nitro-bisphenol A Steroid hormone