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Spatio-temporal characteristics of genotoxicity in the Yangtze River under the background of COVID-19 pandemic

Frontiers of environmental Science & Engineering 2024年第11期18卷 121-132页

作者： Xinge Wang Na Li Yingnan Han Xiao Li Weixiao Qi Jian Li Kaifeng Rao Zijian Wang Yanjie Wei Mei Ma Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Yangtze Eco-Environment Engineering Research Center China Three Gorges CorporationBeijing 100038China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery Beijing 100085China University of Chinese Academy of Sciences Beijing 100049China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China Engineering Research Center of Groundwater Pollution Control and Remediation Ministry of EducationCollege of Water SciencesBeijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Protection in Water Transport Engineering Ministry of Communications Tianjin Research Institute of Water Transport EngineeringTianjin 300456China

The global spread of viruses can lead to the release of large amounts of disinfectants or antiviral drugs into the water *** resulting disinfection byproducts(DBPs)and residual antiviral drugs,acting as genotoxic substances or their precursors,may pose risks to aquatic animals and drinking water sources;however,to date,no studies have analyzed the changes in genotoxicity in the Yangtze River before and after the *** the present study,water and sediment samples from the Yangtze River were collected during different seasons,just before and after the outbreak of COVID-19,and were assessed using the SOS/umu test(with and without liver S9).The results indicated that water samples exhibited more pronounced genotoxicity than did sediments,with direct genotoxicity being the primary ***,there were significant regional differences,with notably greater genotoxicity observed in the upper Yangtze River than in the lower reaches before the COVID-19 ***,this trend was reversed six to ten months later,suggesting the accumulation of DBPs or antiviral drugs after the COVID-19 ***,the risk quotient indicated that 65%of the water samples posed a high risk for Paramecium caudatum,whereas 71%of the samples posed a medium risk for Danio rerio,thereby representing a potential threat to the ecological security of the Yangtze *** conclusion,this study,at the basin scale,revealed the impacts of COVID-19 on the Yangtze River,highlighting the need to prevent DBPs and pharmaceutical pollution during similar events in the future.

关键词： Yangtze River COVID-19 Genotoxicity Spatio-temporal characteristics

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Biocomposite based on graphene oxide immobilized Pseudomonas psychrotolerans for the recovery of Y(III) in acid mine drainage

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Chemosphere 2024年 346卷 140589页

作者： Zhang, Chenxin Chen, Wei Zhang, Tao Chen, Zuliang Fujian Key Laboratory of Pollution Control and Resource Reuse School of Environmental and Resource Sciences Fujian Normal University Fujian Province Fuzhou350007 China

Rare earth elements (REEs) recovery is a critical issue concerning both resource recovery and wastewater utilization. In this study, a new bio-composite was fabricated using graphene oxide immobilized Pseudomonas psychrotolerans (PP@GO), which was isolated from the soil of REEs mine. Results showed that 99.6% Y(III) was removed in 48 h and various characterization confirmed that S–S, –NH2, HPO42−, –OH and –COOH from extracellular polymeric substances (EPS) secreted by microorganisms formed complexation with Y(III). As well, the Y(III) adsorption best followed Freundlich isotherm and non-linear pseudo-second-order kinetic model having R2 of 0.985 and 0.996, respectively, demonstrating that the adsorption was governed by multilayered chemisorption. Additionally, the effectiveness of PP@GO was not limited to Y(III), where 27.9% of this substance was removed in acid mine drainage (AMD), also exhibited great adsorption for other REEs, such as Er (45.0%) and Ho (43.8%). Furthermore, the adsorption efficiency of Y(III) remained high (70.0%) after a 5th cycle, emphasizing the consistent stability of PP@GO. Finally, REEs adsorbed could be greatly desorbed by KNO3, like Sm (80.1%) and La (80.0%), which revealed that PP@GO has great potential to recover REEs in AMD. Overall, this study offers a promising strategy for the green and sustainable REEs recovery and wastewater treatment. © 2023 Elsevier Ltd

关键词： Rare earths

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Evaluation of the technoeconomic feasibility of electrochemical hydrogen peroxide production for decentralized water treatment

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Frontiers of environmental Science & Engineering 2021年第1期15卷 31-45页

作者： Yang Li Yixin Zhang Guangshen Xia Juhong Zhan Gang Yu Yujue Wang School of Environment State Key Joint Laboratory of Environmental Simulation and Pollution ControlBeijing Key Laboratory for Emerging Organic Contaminants ControlTsinghua UniversityBeijing 100084China

This study evaluated the feasibility of electrochemical hydrogen peroxide(H2O2)production with gas diffusion electrode(GDE)for decentralized water *** black-polytetrafluoroethylene GDEs were prepared and tested in a continuous flow electrochemical cell for H2O2 production from oxygen *** showed that because of the effective oxygen transfer in GDEs,the electrode maintained high apparent current efficiencies(ACEs,>80%)for H_(2)O_(2) production over a wide current density range of 5–400 mA/cm^(2),and H_(2)O_(2) production rates as high as~202 mg/h/cm^(2) could be ***-term stability test showed that the GDE maintained high ACEs(>85%)and low energy consumption(<10 kWh/kg H2O2)for H_(2)O_(2) production for 42 d(~1000 h).However,the ACEs then decreased to~70%in the following 4 days because water flooding of GDE pores considerably impeded oxygen transport at the late stage of the *** on an electrode lifetime of 46 days,the overall cost for H2O2 production was estimated to be~0.88$/kg H_(2)O_(2),including an electricity cost of 0.61$/kg and an electrode capital cost of 0.27$/*** a 9 cm^(2) GDE and 40 mA/cm^(2) current density,~2–4 mg/L of H2O2 could be produced on site for the electro-peroxone treatment of a 1.2 m^(3)/d groundwater flow,which considerably enhanced ibuprofen abatement compared with ozonation alone(~43%–59%vs.7%).These findings suggest that electrochemical H_(2)O_(2) production with GDEs holds great promise for the development of compact treatment technologies for decentralized water treatment at a household and community level.

关键词： Advanced oxidation process Electro-peroxone Gas diffusion electrode Hydrogen peroxide Oxygen reduction

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Hydrochar-embedded carboxymethyl cellulose-g-poly(acrylic acid)hydrogel as stable soil water retention and nutrient release agent for plant growth

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Journal of Bioresources and Bioproducts 2022年第2期7卷 34-45页

作者： Yufei Zhang Xinyue Tian Qiuyue Zhang Huifang Xie Bingyu Wang Yanfang Feng Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural SciencesNanjing 210014China

The cellulose-based hydrogel has been widely applied for soil water retention and nutrient re-lease agents for several *** the inorganic materials into hydrogels is an excellent strategy to improve the inherent limits of the cellulose-based ***,municipal sludge-derived hydrochar(HC)has reduced the environmental burden and offered a potential hydrogel carrier to control water-retention and ***,the above function for plant growth of hydrochar-embedded carboxymethyl cellulose-g-poly(acrylic acid)(CMC-g-PAA/HC)is unknown,and relevant reports are *** study investigated the water retention,nutri-ent release behavior,and effect of germination and plant growth of CMC-g-PAA/HC *** results showed that HC was successfully incorporated into CMC-g-PAA/HC with 6.0%higher thermostability,7.2-21.0%lower swelling ratio(SR)in water,and substantial SR in phosphate solution(P-solution).The water loss rate of CMC-g-PAA/HC in P-solution or wa-ter owned a more significant temperature response(7.9-15.0 folds)than CMC-g-PAA(8.2-10.0 folds).Moreover,4.0%higher n value and more 18.5%released P for CMC-g-PAA/HC were also *** phenomena were due to restricting the polymer chains movement and the wa-ter molecules diffusion inside the hydrogels with *** assessments showed that HC in CMC-g-PAA/HC could effectively alleviate the inhibition effects on rape germination retained with 78.3%germination vigor and 80.0%germination ratio,even dramatically improved plant growth to 28 *** results of this study demonstrated a new route for developing eco-friendly CMC-g-PAA/HC hydrogel,advantageous as a water retention agent and nutrient carrier in arid and semiarid regions.

关键词： Hydrogel Hydrochar Stable phosphorus-release Water retention Plant growth

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Cadmium immobilization by mercapto-palygorskite in alkaline soil: Impacts on soil microbial communities and wheat rhizosphere metabolism

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Science of the Total environment 2024年 955卷 176734页

作者： Ma, Wenyan Ge, Chenghao Sun, Yuebing Wang, Min Zhou, Dongmei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Agro-Environmental Protection Institute Ministry of Agriculture and Rural Affairs Tianjin300191 China

Weakly alkaline cadmium (Cd) contaminated soil in China has aroused great concern regarding its impact on food security and human health. Mercapto-modified palygorskite (MP) has exhibited good potential to minimize Cd accumulation in wheat, it is imperative to understand the underlying mechanisms within the soil-wheat-microbial system for sustainable development of agrochemicals. This study evaluated the effects of various MP dosages on soil Cd bioavailability, rhizosphere metabolomics, microbial community structure and wheat growth. The results indicated that MP (0.05–0.2 %) application significantly reduced Cd accumulation in wheat grains by 59.0–83.2 % (p © 2024 Elsevier B.V.

关键词： Agricultural food safety Cadmium Mercapto-palygorskite Metabolism Microbial community

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Intensifying electrified flow-through water treatment technologies via local environment modification

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Frontiers of environmental Science & Engineering 2024年第6期18卷 17-25页

作者： Zheng-Yang Huo Xiaoxiong Wang Xia Huang Menachem Elimelech School of Environment and Natural Resources Institute of Ecological CivilizationRenmin University of ChinaBeijing 100872China Institute for Ocean Engineering Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Center of Double Helix Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Chemical and Environmental Engineering Yale UniversityNew HavenCT 06520-8286USA

Removing high-risk and persistent contaminants from water is challenging,because they typically exist at low concentrations in complex water *** flow-through technologies are viable to overcome the limitations induced by mass transport for efficient contaminant *** the local environment of the flow-through electrodes offers opportunities to further improve the reaction kinetics and selectivity for achieving near-complete removal of these contaminants from ***,we present state-of-the-art local environment modification approaches that can be incorporated into electrified flow-through technologies to intensify water *** first show methods of nanospace incorporation,local geometry adjustment,and microporous structure optimization that can induce spatial confinement,enhanced local electric field,and microperiodic vortex,respectively,for local environment *** then discuss why local environment modification can complement the flow-through electrodes for improving the reaction rate and ***,we outline appropriate scenarios of intensifying electrified flow-through technologies through local environment modification for fit-for-purpose water treatment applications.

关键词： Point-of-use water treatment Electrified membrane Advection-enhanced mass transport Water decontamination and disinfection Emerging contaminants

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Prediction of as and Cd Dissolution in Various Soils Under Flooding Condition

SSRN

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SSRN 2024年

作者： Ge, Jingwen Wu, Song Wu, Haotian Lin, Jianyu Cai, Yijun Zhou, Dongmei Gu, Xueyuan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing China Institute of Soil Science Chinese Academy of Sciences Nanjing China

Although the mobility of arsenic (As) and cadmium (Cd) in soils during the flooding-drainage process has been intensively studied, prediction their dissolution among various soils still remains a challenge. After comprehensively monitoring multiple parameters related to As and Cd dissolution in 8 soils for a 60-day anaerobic incubation, the redundancy analysis (RDA) and structural equation model (SEM) were employed to identify the key factors and influencing pathways controlling the dynamic release of As and Cd. Results showed that pH alone explained 90.5% Cd dissolution, while the dissolved-Fe(II) and 5M-HCl extractable Fe(II) jointly only explained 50.6% As dissolution. After data normalization, the ratio of Fe(II) to 5M-HCl extracted total Fe (i.e. [[EQUATION]]/[[EQUATION]]) significantly improved the correlation to R2 = 0.824 (p © 2024, The Authors. All rights reserved.

关键词： Dissolution

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Forest Mercury Deposition Observation in Chongqing: Evaluating Effectiveness of Mercury pollution control over the Past Decade in Southwestern China

ACS ES&T Air

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ACS ES&T Air 2025年第2期2卷 286-294页

作者： Ziyi Zhan Dongwei Lv Huang Zhou Qingru Wu Yuying Cui Lei Duan State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University 100084 Beijing China School of the Environment Nanjing University 210023 Nanjing China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University 100084 Beijing China；State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University 100084 Beijing China

As the largest Hg reservoir in terrestrial ecosystems, forests provide valuable insights into atmospheric Hg levels through observations of mercury deposition. In this study, we conducted a one-year observation of Hg deposition, by both throughfall and litterfall, in a forest located in Chongqing, an industrial hub in southwestern China, in 2021. We compared the results with observations made at the same sampling site in 2010–2011. The results showed that there were significant decreases in both Hg concentrations (from 115 μg·kg–1to 80.2 μg·kg–1for litterfall and from 68.4 ng·L–1to 4.01 ± 2.09 ng·L–1for throughfall) and Hg deposition fluxes (from 89.8 μg·m–2·yr–1to 19.9 μg·m–2·yr–1for total deposition, decreasing by 77.8%) in the forest from 2010 to 2021. The decrease in deposition might result from the synergistic effect of reduction in both anthropogenic (inventory-listed or nonquantitative) and re-emission sources. Over the decade since the initiation of theMinamata Convention on Mercury, atmospheric Hg levels have decreased significantly, mainly due to the co-benefits of conventional air pollutant control, indicating the effectiveness of China’s Hg pollution control policies.

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Visible-light-driven heterostructured g-C_(3)N_(4)/Bi-TiO_(2) floating photocatalyst with enhanced charge carrier separation for photocatalytic inactivation of Microcystis aeruginosa

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Frontiers of environmental Science & Engineering 2021年第6期15卷 367-378页

作者： Jingke Song Chenyang Li Xuejiang Wang Songsong Zhi Xin Wang Jianhui Sun School of Environment Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control(Ministry of Education)Henan Key Laboratory for Environmental Pollution ControlHenan Normal UniversityXinxiang 453007China College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection MaterialsSchool of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006China

The increase in occurrence and severity of cyanobacteria blooms is causing increasing concern;moreover,human and animal health is affected by the toxic effects of Microcystin-LR released into the *** this paper,a floating photocatalyst for the photocatalytic inactivation of the harmful algae Microcystis aeruginosa(***)was prepared using a simple sol-gel method,i.e.,coating g-C_(3)N_(4) coupled with Bi-doped TiO_(2) on Al_(2)O_(3)-modified expanded perlite(CBTA for short).The impact of different molar ratios of Bi/Ti on CBTA was *** results indicated that Bi doping in TiO_(2) inhibited photogenerated electron-hole pair *** 6 h of visible light illumination,75.9%of ***(initial concentration=2.7106 cells/L)and 83.7%of Microcystin-LR(initial concentration=100μg/L)could be removed with the addition of 2 g/L CBTA1%(i.e.,Bi/Ti molar ratio=1%).The key reactive oxygen species(ROSs)in the photocatalytic inactivation process are h+and*** induction of the Bi^(4+)/Bi^(3+)species by the incorporation of Bi could narrow the bandgap of TiO_(2),trap electrons,and enhance the stability of CBTA-1%in the solutions with coexisting environmental substances.

关键词： Bi doping Visible light Algal removal Charge carrier separation

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Sustainable Generation of Sulfate Radicals and Decontamination of Micropollutants via Sequential Electrochemistry

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Engineering 2023年第11期30卷 144-152页

作者： Wentian Zheng Shijie You Yuan Yao Nanqi Ren Bin Ding Fang Li Yanbiao Liu College of Environmental Science and Engineering Donghua UniversityShanghai 201620China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150080China Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 200051China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

The removal of emerging micropollutants in the aquatic environment remains a global *** routes are often chemically,energetically,and operationally intensive,which decreases their sustainability during ***,we develop an advanced chemical-free strategy for micropollutants decontamination that is solely based on sequential electrochemistry involving ubiquitous sulfate anions in natural and engineered *** can be achieved via a chain reaction initiated by electrocatalytic anodic sulfate(SO_(4)^(2-))oxidation to produce persulfate(S_(2)O_(8)^(2-))and followed by a cathodic persulfate reduction to produce sulfate radicals(SO_(4)^(·-)).These SO_(4)^(·-)are powerful reactive species that enable the unselective degradation of micropollutants and yield SO_(4)^(2-)again in the treated *** proposed flow-through electrochemical system achieves the efficient degradation(100.0%)and total organic carbon removal(65.0%)of aniline under optimized conditions with a single-pass *** also reveal the effectiveness of the proposed system for the degradation of a wide array of emerging micropollutants over a broad pH range and in complex *** work provides the first proof-ofconcept demonstration using ubiquitous sulfate for micropollutants decontamination,making water purification more sustainable and more economical.

关键词： Advanced oxidation Chain reaction Sulfate radical Micropollutants Sequential electrochemistry

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