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Different response of bacterial community to the changes of nutrients and pollutants in sediments from an urban river network

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Frontiers of environmental Science & Engineering 2020年第2期14卷 161-172页

作者： Fang Zhang Hao Zhang Ying Yuan Dun Liu Chenyu Zhu Di Zheng Guanghe Li Yuquan Wei Dan Sun School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua UniversityBeijing 100084China College of Resource and Environmental Science China Agricultural UniversityBeijing 100193China Ocean College Zhejiang UniversityZhoushan 316021China

Microbial communities in sediment are an important indicator linking to environmental pollution in urban river ***,how the diversity and structure of bacterial communities in sediments from an urban river network respond to different environmental factors has not been well *** goal of this study was to understand the patterns of bacterial communities in sediments from a highly dense urbanized river network in the lower Yangtze River Delta by Illumina MiSeq *** correlations between bacterial communities,the environmental gradient and geographical distance were analyzed by redundancy analysis(RDA)and network *** diversity and richness of bacterial community in sediments increased from upstream to downstream consistently with the accumulation of nutrient in the urban river *** community composition and structure showed obvious spatial changes,leading to two distinct groups,which were significantly related to the characteristics of nutrient and heavy metal in *** substance,available nitrogen,available phosphorus,Zn,Cu,Hg and As were selected as the key environmental factors shaping the bacterial community in sediments based on *** co-occurrence patterns of bacterial networks showed that positive interaction between bacterial communities increased but the connectivity among bacterial genera and stability of sediment ecosystem reduced under a higher content of nutrient and heavy metal in *** sensitive and ubiquitous taxa with an overproportional response to key environmental factors were detected as indicator species,which provided a novel method for the prediction of the pollution risk of sediment in an urban river network.

关键词： Sediment Urban river network Bacterial community Network analysis Indicator species

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Regulated Fabrication of Co-Fe/Cofe2o4/C-N: Adsorption and Interfacial Effects Enhanced Atrazine Removal Via Pms

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SSRN 2025年

作者： Li, Jinghan Niu, Junfeng Wang, Weilai Wang, Xinyang Wang, Yan Sun, Wenjing Li, Cancan Wang, Tian Liu, Haijin Wu, Yuandong Ministry of Education Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control School of Environment College of International Education Henan Normal University Henan Xinxiang453007 China Center for Child Care and Mental Health Shenzhen Children’s Hospital Guangdong Shenzhen518000 China Peking University China Dongguan University of Technology China

Oxidative degradation of refractory organic pollutants in water by activated PMS (peroxymonosulfate) has attracted much attention. In this work, catalyst with excellent adsorption and PMS activation properties was prepared via polymerization-precipitation-calcination process. It was found that calcination temperature had significant effects on catalyst composition, defect formation and catalytic activity. At 600 °C in a nitrogen atmosphere, the catalyst (Co-Fe/CoFe2O4/C-N) with abundant low valence metal (91.38% Fe2+ and 71.32% Co2+) and significant interface effect can be obtained. The adsorption-degradation process of atrazine (ATZ) can be quickly performed by adding only 25 mg/L of Co-Fe/CoFe2O4/C-N. The experiment verified that the van der Waals force was the main adsorption force, and the interface effect formed a fast electron transport tunnel to enhance the activation of PMS. The degradation path of ATZ was investigated by EPR analysis, Fukui index calculation and LC-MS determination. Moreover, the degradation experiment of ATZ in real water bodies (surface water) and its continuous flow experiment were studied. This work adds a new research content for advanced oxidation technology involved in PMS. © 2025, The Authors. All rights reserved.

关键词： River pollution

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A Low-Cost Microbial Fuel Cell Based Sensor for In-Situ Monitoring of Dissolved Oxygen for Over Half a Year

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SSRN 2022年

作者： Sun, Dan Xie, Bin Li, Jiahao Huang, Xuzhan Chen, Jiawang Zhang, Fang Institute of Ocean Engineering and Technology Ocean College Zhejiang University Zhoushan316021 China State Key Joint Laboratory of Environment Simulation and Pollution Control State Environment Protection Key Laboratory of Microorganism Application and Risk Control School of Environment Tsinghua University Beijing100084 China

Various dissolved oxygen (DO) sensors have been successfully developed for short-term or laboratory monitoring. However, only few of them can be used for long-term and in-situ DO measurement, and most of them had problems including high cost and weekly calibration. Here, a chitin-carrying microbial fuel cell (MFC) based sensor was developed using sediment anolyte for long-term DO monitoring without maintenance, with an extremely low cost of 12.17$ and a performance comparable to certain commercial sensors. The long lifetime of over half a year was attributed to the syntrophic interactions between fermentative and exoelectrogenic microbes that were well developed for chitin degradation in anaerobic condition by using sediment filling in the anode chamber. With sediment anolyte, glass fiber was used as the separator to replace the ion exchange membrane, resulting in a much lower cost which was only 0.2% of the HACH sensor (SBE 63) or 0.5% of the YIS sensor (EXO3) for in-situ DO monitoring. Field tests of this MFC based DO sensor were conducted in fresh and saline waters respectively. Excellent performances were achieved with average deviations of © 2022, The Authors. All rights reserved.

关键词： Dissolved oxygen

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One representative water supply system in China with nitrosamine concern: Challenges and treatment strategies

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Journal of environmental Sciences 2020年第2期32卷 12-20页

作者： Yu Qiu Er Bei Yufang Wang Jun Wang Xiaojian Zhang Chao Chen State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Research Institute for Environmental Innovation(Suzhou) TsinghuaSuzhou 215163China

Four sampling campaigns were conducted in two years to understand the fluctuation of N-Nitrosamines(NAs) and their precursors in one drinking water treatment plant(DWTP) in East China in different *** water supply system has been facing several nitrosamine challenges related with source water, including the switch of water source,high concentration of ammonium, formed NAs and NA formation potential(FP) in source ***, the use of ozonation in the DWTP and chloramination in networks will increase the NDMA concentration in tap *** address these challenges, the biopretreatment was applied in this DWTP to decrease the concentration of ammonium and *** following biological activated carbon(BAC) will neutralize the nitrosamine increase brought by *** use of free chlorine in disinfection process will also decrease the NDMA formation compared with *** results will benefit other cities in China and other countries with similar impacted water sources.

关键词： Drinking water treatment plant Formation potential Networks N-Nitrosamines Precursor

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Industrial-Scale Highly Efficient Nickel Recovery from Electroplating Wastewater Using Resin Adsorption Followed by Aeration Mixing Acid Regeneration

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SSRN 2023年

作者： Li, Tong Ji, Xianhua Wang, Dongsheng Zhang, Qianxin Zhang, Menghan Yu, Gang Deng, Shubo State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing Key Laboratory for Emerging Organic Contaminants Control School of Environment Tsinghua University Beijing100084 China Jiangsu Jingyuan Environmental Protection Co. Ltd. Jiangsu Nantong226000 China Advanced Interdisciplinary Institute of Environmental and Ecology Beijing Normal University Zhuhai519000 China

Cation-exchange resins have been widely used to recover nickel from electroplating wastewater, while resin regeneration often consumes a large amount of acid and alkali, resulting in low nickel concentrations in regeneration solution. In this study, the industrial-scale nickel recovery from electroplating wastewater using resin adsorption and regeneration was investigated. Two cation-exchange resin tanks and one chelated resin tank in series effectively reduced the nickel concentrations to below 0.1 mg/L, meeting the strictest nickel discharge standard. The spent resin could be efficiently regenerated by a novel aeration mixing method, which greatly reduced acid and alkali consumption in comparison with the traditional downstream regeneration method, and the acid utilization ratio was 99.9%. The spent resin was regenerated by 4% - 7.2% (w/w) HCl eluent, and 2 bed volume (BV) of 6% HCl showed the better regeneration, achieving high nickel concentration and acid utilization. More than 60 g/L of nickel ions in regeneration solution was stably obtained by synergistically controlling the concentration and volume of eluent and enhancing mass transfer by aeration, which benefited the subsequent nickel recovery by electrodeposition, and the regeneration time was greatly reduced to 2-3 h. Similarly, H2SO4 was also effective for nickel desorption from the spent resins. This study provided an effective resin regeneration method to consume less regenerant and obtain high nickel concentrations, making the nickel recovery cost-effective. © 2023, The Authors. All rights reserved.

关键词： Mixing

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Continuous Adsorption Removal of Trace Lead from Drinking Water in a Functionalized Activated Carbon Fibers Fixed Bed Column

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SSRN 2024年

作者： Zuo, Qi Zheng, Hong Zhang, Pengyi Zhang, Yu Zhang, Jiejing Zhang, Baichao Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing100083 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Functionalized activated carbon fibers (ACFs) have good application prospects for eliminating trace heavy metals ions from water. Continuous removal in a fixed bed is preferred and supposed industrially feasible for the elimination of various pollutants in comparison to batch operation. Herein, the dynamic adsorption performance of ACFs pretreated using hydrogen peroxide and further functionalized by polydopamine (PDA/OACF) for trace Pb(II) ions was evaluated using a continuously operating fixed-bed adsorption device, and its adsorption behavior for trace Pb(II) ions was investigated at different bed heights, flow rates and influent lead ions concentrations. 0.6 g PDA/OACF could purify over127.80 L (22421 BVs) deionized water containing 150 μg L-1 Pb(II) ions and ensure the effluent concentration to meet WHO safe drinking water standard at 6 cm bed height and 5 mL min-1 flow rate. Four models including Thomas, Adams-Bohart, Yoon-Nelson and BDST models could fit the dynamic adsorption data well. The actual drinking water containing trace lead could also be efficiently purified and 0.6 g PDA/OACF could purify about 44 L (7719 BVs) tap water containing 150 μg L-1 Pb(II) by adding manganese sand filter media at the front end of the PDA/OACF fixed-bed. PDA/OACF shows superior cost competitiveness and good application prospect in the purification of drinking water. © 2024, The Authors. All rights reserved.

关键词： Potable water

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Phosphorus transformation under the influence of aluminum,organic carbon,and dissolved oxygen at the water-sediment interface:A simulative study

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Frontiers of environmental Science & Engineering 2020年第3期14卷 165-176页

作者： Ouchen Cai Yuanxiao Xiong Haijun Yang Jinyong Liu Hui Wang State Key Joint Laboratory on Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084 Beijing 101 Middle School Beijing 100091China Department of Chemistry Tsinghua UniversityBeijing 100084China

The effects of sediment aluminum(Al),organic carbon(OC),and dissolved oxygen(DO)on phosphorus(P)transformation,at the water-sediment interface of a eutrophic constructed lake,were investigated via a series of simulative *** above three factors had various influences on dissolved P concentration,water pH,water and surface sediment appearance,and P *** of Al had the greatest effect on suppressing P release,and the water p H remained alkaline in the water-sediment system under various OC and DO *** dissolution of the added Al was detected.31P-N M R characterization suggested that OC addition did not promote biological P uptake to polyphosphates under oxic *** simulation result on the added phytate indicated the absence of phytate in the original lake *** compared to the reported natural lakes and wetland,the water-sediment system of the constructed lake responded differently to some simulative *** Al,OC,and DO can be controlled with engineering methods,the results of this study provide insights for the practical site restorations.

关键词： Phosphorus Sediment simulation Dissolved oxygen Organic carbon Aluminum

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Janus Photoelectrocatalytic Filter for Sustainable Water Decontamination

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SSRN 2023年

作者： Jin, Limin Sun, Meng Yang, Jianping Huang, Yingping Liu, Yanbiao College of Environmental Science and Engineering Textile Pollution Controlling Engineering Center The Ministry of Ecology and Environment Donghua University Shanghai201620 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Yichang443002 China Shanghai Institute of Pollution Control and Ecological Security 1239 Siping Road Shanghai200092 China

Herein, we conceive a Janus photoelectrocatalytic filter (Sb-Fe/MXene) by depositing Sb single-atoms (Sb-SA) and Fe nanoclusters (Fe-NC) decorated MXene mixture on either side of Ni-foam substrate, respectively, which realized sustainable and efficient generation of hydrogen peroxide (H2O2) and hydroxy radical (•OH) without any chemical input. Photocatalytic-side ensures that the accumulated holes at Ti vacancies neighboring the Sb-SA promote the 4e− water oxidation reactions to produce O2, while the Sb-SA sites collect electrons forming reducing centers for non-sacrificial H2O2 production via the 2e− oxygen reduction reaction. Electrocatalytic-side guarantees the circulation of ≡Fe(III)/≡Fe(II) by continuously exposing"fresh" reactive sites by dissociating H2O2 on the ≡Fe(II). This further prohibits iron sludge accumulation with an enhanced remedy of micropollutants, even under neutral conditions for wastewater. The collaborative effect between photochemistry and electrochemistry establishes a strategy for energy conversion and environmental remediation using a Janus photoelectrocatalytic filtration system. © 2023, The Authors. All rights reserved.

关键词： Hydrogen peroxide

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A Stochastic Exposure Model Integrating Random Forest and Agent-Based Approaches: Evaluation for Pm2.5 in Jiangsu, China

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SSRN 2022年

作者： Zhou, Qi Wang, Xin Shu, Ye Sun, Li Jin, Zhou Ma, Zongwei Liu, Miaomiao Bi, Jun Kinney, Patrick L. State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing China Department of Environmental Health School of Public Health Boston University BostonMA United States

This research proposes an Activity Pattern embedded Air pollution Exposure Model (AP2EM), based on survey data of when, where, and how people spend their time and indoor/outdoor ratios for microenvironments. AP2EM integrates random forest and agent-based approaches to simulate the stochastic exposure to outdoor fine particulate matter (PM2.5) along with indoor and in-vehicle PM2.5 of outdoor origin. The R2 of the linear regression between the model's calculations and personal measurement was 0.65, which was more accurate than the commonly-used aggregated exposure (AE) model and the outdoor exposure (OE) model. The population-weighted PM2.5 exposure estimated by the AP2EM was 36.7 μg/m3 in Jiangsu, China, during 2014-2017. The OE model overestimated exposure by 54.0%, and the AE model underestimated exposure by 6.5%. These misestimate reflect ignorance of traditional studies on effects posed from time spent indoors (~85%) and doing low respiratory rate activities (~93%), problems of biased sampling, and neglecting low probability events. The proposed AP2EM treats activity patterns of individuals as chains and uses stochastic estimates to model activity choices, providing a more comprehensive understanding of human activity and exposure characteristics. Overall, the AP2EM is applicable for other air pollutants in different regions and benefits China's air pollution control policy designs. © 2022, The Authors. All rights reserved.

关键词： Stochastic systems

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First insights into per-and polyfluoroalkyl substance contamination in edible fish species of the Indus water system of Pakistan

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Chemosphere 2024年 349卷 140970页

作者： Riaz, Rahat Abdur Rehman, Muhammad Yasir Junaid, Muhammad Iqbal, Taimoor Khan, Jawad Aslam Dong, Yanran Yue, Linxia Chen, Yupeng Xu, Nan Malik, Riffat Naseem Environmental Health Laboratory Department of Environmental Sciences Quaid-i-Azam University Islamabad Pakistan Key Laboratory for Heavy Metal Pollution Control and Reutilization School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen518055 China Joint Laboratory of Guangdong Province and Hong Kong Region on Marine Bioresource Conservation and Exploitation College of Marine Sciences South China Agricultural University Guangzhou510641 China

Per- and polyfluoroalkyl substances (PFASs) are a group of emerging contaminants, that have a wide range of applications in industrial and commercial products. The direct discharge of untreated industrial and domestic wastewater into freshwater bodies is a common practice in developing countries, which are the main contributors to PFASs in the aquatic environment. The situation is further worsened due to poor wastewater treatment facilities and weak enforcement of environmental regulations in countries like Pakistan. The current study was designed to assess PFASs contamination in muscle tissues of edible fish species from major tributaries of the Indus System, including Head Panjnad (HP), Head Trimmu (HT), Chashma Barrage (CB), Head Blloki (HB) and Head Qadirabad (HQ). The analysis of target PFAS was performed using ultrahigh-performance liquid chromatography coupled with a quadrupole Orbitrap high-resolution mass spectrometry. The highest levels of ∑17PFASs were observed in S. seenghala, C. mirigala from HB, and C. mirigala from HQ with a mean value of 45.4 ng g-1, 43.7 ng g-1, and 40.8 ng g-1, respectively. Overall, the compositional profile of fish samples was predominated by long-chain PFASs such as PFOA, PFOS, PFHpS, and PFDS. The accumulation of PFASs in fish species is dependent on the physiochemical properties of PFASs, characteristics of the aquatic environment, and fish species. Significant associations of PFASs with isotopic composition (p © 2023 Elsevier Ltd

关键词： Health risks

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