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FeCoP sub-nanometric-sheets for electrocatalzing overall water splitting

Nano Research Energy 2024年第4期3卷 68-76页

作者： Long Zhao Kexin Meng Yibo Guo Qingsheng Wu Quanjing Zhu Tao Zhou Yongqing Fu Ming Wen School of Chemical Science and Engineering School of Environmental Science and EngineeringShanghai Key Laboratory of Chemical Assessment and SustainabilityState Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China College of Bioengineering East China University of Science and TechnologyShanghai 200237China Faculty of Engineering and Environment Northumbria UniversityNewcastle upon Tyne NE99UK

Renewable electrical energy for electrolysis water can achieve green industrial chains for hydrogen ***,finding efficient electrocatalysts remains a challenge for green ***,sub-nanometric FeCoP nanosheets with average thickness of 0.9 nm is constructed through 2D self-assembly driven by cavitation effect of ultrasonics and following *** from abundant active sites,enhanced H_(2)O molecular adsorption kinetics,and highly enhanced structural stability,the subcrystalline FeCoP shows excellent electrocatalytic activities of hydrogen evolution reaction(HER)and oxygen evolution reactions(OER).Ultralow overpotential of 37 mV is achieved at 10 mA·cm^(-2) for *** the FeCoP catalyst was used as both cathode and anode for overall water splitting using renewable electrical energy,green hydrogen produced is directly applied for hydrogen fuel cell to drive fan for more than 10 *** calculation indicates that subcrystalline FeCoP more easily adsorbs H_(2)O than crystalline one and thus speeds up the kinetics of Volmer step in HER process.

关键词： green hydrogen energy subcrystalline overall water splitting sub-nanometric-sheets

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Understanding the risks of mercury sulfide nanoparticles in the environment: Formation, presence, and environmental behaviors

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Journal of environmental Sciences 2022年第9期34卷 78-92页

作者： Pei Lei Nan Zou Yujiao Liu Weiping Cai Mengjie Wu Wenli Tang Huan Zhong State Key Laboratory of Pollution Control and Resource Reuse School of EnvironmentNanjing UniversityNanjing 210023China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Environmental and Life Sciences Program(EnLS) Trent UniversityPeterborough OntarioK9L 0G2Canada

Mercury(Hg) could be microbially methylated to the bioaccumulative neurotoxin methylmercury(Me Hg), raising health concerns. Understanding the methylation of various Hg species is thus critical in predicting the Me Hg risk. Among the known Hg species, mercury sulfide(HgS) is the largest Hg reservoir in the lithosphere and has long been considered to be highly inert. However, with advances in the analytical methods of nanoparticles, HgS nanoparticles(HgS NPs) have recently been detected in various environmental matrices or organisms. Furthermore, pioneering laboratory studies have reported the high bioavailability of HgS NPs. The formation, presence, and transformation(e.g., methylation) of HgS NPs are intricately related to several environmental factors, especially dissolved organic matter(DOM). The complexity of the behavior of HgS NPs and the heterogeneity of DOM prevent us from comprehensively understanding and predicting the risk of HgS NPs. To reveal the role of HgS NPs in Hg biogeochemical cycling, research needs should focus on the following aspects: the formation pathways, the presence, and the environmental behaviors of HgS NPs impacted by the dominant influential factor of DOM. We thus summarized the latest progress in these aspects and proposed future research priorities, e.g., developing the detection techniques of HgS NPs and probing HgS NPs in various matrices, further exploring the interactions between DOM and HgS NPs. Besides, as most of the previous studies were conducted in laboratories, our current knowledge should be further refreshed through field observations, which would help to gain better insights into predicting the Hg risks in natural environment.

关键词： Bioavailability Bioaccumulation Organic matter Mercury methylation Dissolution Aggregation

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Coastal mudflats as reservoirs of extracellular antibiotic resistance genes: Studies in Eastern China

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Journal of environmental Sciences 2023年第7期129卷 58-68页

作者： Qingbin Yuan Xiaolin Wang Hui Fang Yuan Cheng Ruonan Sun Yi Luo College of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Medicine Nankai UniversityTianjin 300071China Department of Civil and Environmental Engineering Rice UniversityHouston 77005USA

Despite coastal mudflats serving as essential ecological zones interconnecting terrestrial/freshwater and marine systems,little is known about the profiles of antibiotic resistance genes(ARGs)in this *** this study,characteristics of typical ARGs,involving both intracellular(iARGs)and extracellular ARGs(eARGs)at different physical states,were explored in over 1000 km of coastal mudflats in Eastern *** indicated the presence of iARGs and eARGs at states of both freely present or attached by *** abundance of eARGs was significantly higher than that of iARGs(87.3%vs 12.7%),and their dominance was more significant than those in other habitats(52.7%-76.3%).ARG abundance,especially for eARGs,showed an increasing trend(p<0.05)from southern(Nantong)to northern(Lianyungang)*** salinity facilitated the transformation from iARGs to eARGs,and smaller soil particle size was conducive to the persistence of eARGs in northern coastal *** study addresses the neglected function of coastal mudflats as eARGs reservoirs.

关键词： Antibiotic resistance genes(ARGs) Extracellular antibiotic resistance genes(eARGs) Coastal mudflats Amplicon sequencing Geochemical variable Mobile genetic elements

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Adhesion between nanobubbles and fine cassiterite particles

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International Journal of Mining Science and Technology 2023年第4期33卷 503-509页

作者： Liuyi Ren Zheyi Zhang Weineng Zeng Yimin Zhang School of Resources and Environmental Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan 430070China State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control Wuhan University of Science and TechnologyWuhan 430081China Hubei Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources Wuhan 430081China

Adhesion is an important process of particle-bubble interaction in fine particle(-10μm)*** paper studied the adhesion process and mechanism between nanobubbles and fine cassiterite particles by using a high-speed camera,atomic force microscope(AFM),adsorption capacity tests,and induction time *** being pretreated with nanobubbles(NBs)water,fine cassiterite particles flotation tests were carried out using caprylhydroxamic acid(CHA)as a *** results showed that NBs can improve the recovery and flotation rate of fine cassiterite while decreasing the collector *** adsorption capacity test indicated that the cassiterite treated with NBs had lower demand for collector *** AFM imaging results further demonstrate that NBs could reduce the adsorption of CHA on the surface of *** NBs played a part of the role of collector,it can improve the flotation effect while reducing the amount of *** induction time test and the high-speed camera observation test showed that NBs promoted the attachment between bubbles and cassiterite *** the other hand,NBs agglomerate cassiterite particles,increasing the probability of particles colliding with bubbles.

关键词： Nanobubbles Cassiterite Flotation Caprylhydroxamic acid

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Combining source identification and risk assessment to uncover spatial risk patterns in an agricultural lake

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Journal of environmental Management 2025年 387卷 125966页

作者： Guo, Jiaxun Xie, Yu Dou, Xuekai Qi, Weixiao Liao, Yunjie Cao, Xiaofeng Peng, Jianfeng Liu, Huijuan Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China School of Environment and Spatial Informatics China University of Mining and Technology Jiangsu Province Xuzhou221116 China

Pollutant source identification and risk assessment underpin environmental management, necessitating innovative methods for both pollution source identification and comprehensive evaluation to enhance management efficiency. In this study, we developed a novel integrated framework that combines Bayesian isotope mixing, positive matrix factorization (PMF), random forest, and spatial autocorrelation for multi-pollutant source identification and risk assessment. The Bayesian isotope mixing model revealed that fertilizers accounted for 61 % of the nitrate in the lake and 46 % of the nitrate in the river. Furthermore, PMF analysis indicated that polycyclic aromatic hydrocarbons (PAHs) in sediments and soil were primarily sourced from vehicular emissions (32 %), while heavy metals (40 %) were mainly from vehicular emissions and agricultural activities. Using a comprehensive pollution assessment framework for water and sediment quality, we found that water quality ranged from "medium" to "excellent", and sediment quality ranged from "good" to "excellent". Among various evaluation indices, CODMn, As, F−, TP, Pb, and Zn were pivotal in determining comprehensive water quality. key indices for sediment quality evaluation included Flua, BaP, BaA, Pyr, Ant, Pb, and As, primarily sourced from automobile emissions and agricultural activities. Spatial autocorrelation analysis demonstrated a spatial relationship between water quality and sediment quality, covering 43 % of the area. High-pollution areas (13 %) were concentrated around natural river inlets, while low-pollution zones (17 %) were located near ecological water replenishment river inlets. This underscores the significant influence of inflowing water quality on sediment conditions. This study highlights the development of a comprehensive pollution assessment framework to evaluate sediment and soil pollution, as well as to identify high-risk zones of compound pollution in water and sediment. Furthermore, the framework's univ

关键词： Lake pollution

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Recent advances in heterogeneous catalysis of solar-driven carbon dioxide conversion

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Journal of environmental Sciences 2024年第6期140卷 165-182页

作者： Jun Xu Farzaneh Arabpour Roghabadi Ying Luo Vahid Ahmadi Qian Wang Zheng Wang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuoHenan 454000China Department of Process Engineering Faculty of Chemical EngineeringTarbiat Modares UniversityTehranIran Optoelectronics and Nanophotonics Research Group Faculty of Electrical and Computer EngineeringTarbiat Modares UniversityTehranIran Graduate School of Engineering Nagoya UniversityFuro-choChikusa-kuNagoya 464-8603Japan

Solar-driven carbon dioxide(CO_(2))conversion including photocatalytic(PC),photoelectrochemical(PEC),photovoltaic plus electrochemical(PV/EC)systems,offers a renewable and scalable way to produce fuels and high-value chemicals for environment and energy *** review summarizes the basic fundament and the recent advances in the field of solar-driven CO_(2)*** the visible-light absorption is an important strategy to improve solar energy conversion *** separation and migration of photogenerated charges carriers to surface sites and the surface catalytic processes also determine the photocatalytic *** engineering including co-catalyst loading,defect engineering,morphology control,surface modification,surface phase junction,and Z-scheme photocatalytic system construction,have become fundamental strategies to obtain high-efficiency *** to photocatalysis,these strategies have been applied to improve the conversion efficiency and Faradaic efficiency of typical PEC *** PV/EC systems,the electrode surface structure and morphology,electrolyte effects,and mass transport conditions affect the activity and selectivity of electrochemical CO_(2)***,the challenges and prospects are addressed for the development of solar-driven CO_(2)conversion system with high energy conversion efficiency,high product selectivity and stability.

关键词： Solar-driven CO_(2)reduction Photocatalytic system Photoelectrochemical system Photovoltaic plus electrochemical system Surface/interface engineering

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Evaluation of N-acetylcysteine and glutathione as quenching agents for the analysis of halogenated disinfection by-products

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Journal of environmental Sciences 2022年第7期34卷 71-79页

作者： Shunke Ding Menglin Wu Rong Xiao Chao Fang Qi Wang Bin Xu Wenhai Chu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Key Laboratory of Yangtze River Water Environment Ministry of EducationTongji UniversityShanghai 200092China School of Life and Environmental Science Wenzhou UniversityZhejiang 325035China

Disinfection by-products(DBPs), formed from the reactions of disinfectants with natural organic matter and halides in drinking water, were considered to be cytotoxic and genotoxic, and might trigger various cancers. The relatively low concentration of DBPs in finished water(low μg/L or even ng/L levels) and the interference from water matrix inhibited in situ determination of DBPs. Moreover, the further formation and degradation of DBPs by disinfectants during the holding time(several hours to several days) from sample collection to analysis could adversely affect the determination of DBPs. To obtain accurate, precise and reliable data of DBP occurrence and formation, robust and reliable sample preservation is indispensable. However, the commonly used quenching agents(e.g., sodium sulfite, sodium thiosulfate, and ascorbic acid) for sample preservation can decompose reactive DBPs by reductive dehalogenation. This study evaluated the performance of N-acetylcysteine(NAC) and glutathione(GSH) as quenching agents for the analysis of halogenated DBPs by investigating the stoichiometry of the disinfectant-quenching agent reaction, the formation of DBPs during chlor(am)ination of NAC or GSH, and the effects of NAC or GSH on the stability of 18 individual DBPs and total organic halogen(TOX). Based on the results of this study, NAC and GSH were considered to be ideal quenching agents for the analysis of most DBPs and TOX, except halonitromethanes.

关键词： Disinfection by-products Total organic halogen Quenching agents N-acetylcysteine Glutathione

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Efficient CO2 Desorption Catalysts: from Material Design to Kinetics Analysis and Application Evaluation

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Engineering 2025年

作者： Xing, Lei Chen, Zhen Zhan, Guoxiong Huang, Zhoulan Wang, Lidong Li, Junhua State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and Engineering North China Electric Power University Beijing102206 China

Catalytic amine-solvent regeneration has been validated as an energy-saving strategy for CO2 chemisorption by boosting reaction kinetics under mild conditions. The upscale performance evaluation and long-term durability are indispensable steps for industrial application but have been scarcely reported thus far. Here, we report a ZrO2/Al2O3 pack catalyst that possesses strong metal oxide-support interactions, a porous structure, active and stable Zr–O–Al coordination, promoted proton transfer and a 40.7% decrease in the energy activation of carbamate decomposition, which significantly accelerates CO2 desorption kinetics. The upscale experiment and cost evaluation based on industrial flue gas revealed that the use of packing catalysts can reduce energy consumption by 27.56% and optimize the overall cost by 10.49%. The active sites present excellent stability in alkaline solvents. This work is the first to investigate the ability of high-technology readiness (technology readiness level at 6 (TRL 6)) for catalytic amine-solvent regeneration, providing valuable insights for potential applications involving efficient CO2 capture with catalyst assistance. © 2024 THE AUTHORS

关键词： Energy efficiency

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Mechanisms of allicin exposure for the sludge fermentation enhancement:Focusing on the fermentation processes and microbial metabolic traits

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Journal of environmental Sciences 2022年第5期34卷 253-264页

作者： Feng Wang Jingyang Luo Shiyu Fang Wenxuan Huang Yunqi Zhang Le Zhang Xiaoshi Cheng Wei Du Fang Fang Jiashun Cao Yang Wu Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes Ministry of EducationHohai UniversityNanjing 210098China College of Environment Hohai UniversityNanjing 210098China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

As a frequently used product with antimicrobial activity,consumed allicin might be dis-charged and concentrated in waste-activated sludge(WAS).However,the influence of al-licin(as an exogenous pollutant)on WAS fermentation has not been clearly *** study aimed to disclose the impacts of allicin on volatile fatty acid(VFA)generation dur-ing WAS *** results showed that the appropriate presence of allicin(10 mg/g TSS)significantly enhanced the VFA yield(1894 versus 575 mg COD/L in the control)with increased acetate proportion(24.3%).Further exploration found that allicin promoted WAS solubilization,hydrolysis and acidification *** analysis revealed that the key genes involved in extracellular hydrolysis metabolism(i.e.,CAZymes),mem-brane transport(i.e.,gtsA and ytfT),substrate metabolism(i.e.,yhdR and pfkC)and fatty acid synthesis(i.e.,accA and accD)were all highly *** also induced the bacteria to produce more signalling molecules and regulate cellular functions,thereby enhancing the microbial adaptive and regulatory capacity to the unfavourable ***,the variations in fermentative microbes and their contributions to the upregulation of func-tional genes(i.e.,ytfR,gltL,INV,iolD and pflD)for VFA generation were ***,the simultaneous stimulation of functional microbial abundances and metabolic activities contributed to VFA production in allicin-conditioned reactors.

关键词： Allicin Waste activated sludge(WAS) Anaerobic fermentation Metagenomic analysis Functional genes

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Hydrothermal aging alleviates hydrocarbon poisoning effects on high-silica Cu-SSZ-16 catalysts for NH 3 -SCR

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Journal of environmental Sciences 2025年 158卷 13-23页

作者： Huan Zhou Jianqi Liu Yan Zhang Shichao Han Jinpeng Du Wenpo Shan Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China Zhejiang Key Laboratory of Pollution Control for Port-Petrochemical Industry Ningbo Urban Environment Observation and Research Station Institute of Urban Environment Chinese Academy of Sciences Ningbo 315800 China Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201210 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

Hydrocarbons (HCs) exert toxic effects on the activity of Cu-based zeolite catalysts for NH 3 -SCR on diesel vehicles. This study investigated the hydrocarbon resistance of both fresh and hydrothermally aged high-silica Cu-SSZ-16 catalysts. It was found that low-temperature activity of Cu-SSZ-16 catalyst decreased after C 3 H 6 poisoning, which was mainly due to the blockage of pore channels and the coverage of Cu active sites as well as acid sites by the formation of carbon deposits. Additionally, [Cu(OH)] + -Z was proposed to be more easily affected by C 3 H 6 poisoning than Cu 2+ -2Z. Hydrothermally aged Cu-SSZ-16 presented better C 3 H 6 resistance than the fresh catalyst since less carbon deposits were accumulated and [Cu(OH)] + -Z species were partially transformed to more-stable Cu 2+ -2Z in the aged sample. This was probably because of the reduction of acid sites and the formation of CuO x , which enhanced the oxidation of C 3 H 6 , thereby inhibiting the formation of carbon deposits. In addition, the coverage of the active Cu species also influenced the adsorption and oxidation of NO, causing a decrease in low-temperature activity. Thus, the low-temperature activity could be fully recovered by hydrothermal treatment at 500 °C due to the removal of carbon deposits and recovery of Cu active sites as well as acid sites. In summary, high-silica Cu-SSZ-16, with high resistance to HCs and excellent hydrothermal stability, is a competitive candidate as a catalyst for the NH 3 -SCR reaction in practical application.

关键词： Cu-SSZ-16 Diesel exhaust Hydrocarbon poisoning Hydrothermal aging NH3-SCR

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