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Mitigation Organic Fouling of Electrified Ceramic Membrane Using in Situ Generated Reactive Species: Combined Theoretical and Experimental Investigation

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SSRN 2024年

作者： Lin, Zhiwei Zhang, Chunhui Liu, Lie Liu, Yanbiao Li, Yanxin Guo, Meiguangzi Chen, Leyi Su, Peidong China University of Mining & Technology Beijing School of Chemical & Environmental Engineering Beijing100083 China Tsinghua University Center for Water & Ecology School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing100084 China Dalian University of Technology Dalian116024 China

The performance of membrane separation processes was limited by organic fouling, and existing anti-organic fouling strategies were ineffective. To address these issues, an electrochemical ceramic membrane (ECM) was developed by ultrasonic spray pyrolysis of a thin SnO2 layer co-doped with Sb and F onto an Al2O3 substrate. Experimental results demonstrated that it displayed excellent hydrophilicity, electrical conductivity (square resistance = 2.47 Ω/sq), electrocatalytic properties (charge transfer resistance = 1.37 Ω), water permeability (178 LMH/bar), low energy consumption (2.61–3.59 kWh/m3) and reusability. Doping of Sb and F in the SnO2 layer led to an increase in the free electron concentration and a decrease in the bandgap width, collectively promoting the electrical conductivity. In situ generation of •OH and 1O2 at the anode membrane interface effectively eliminated organic fouling of the composite membrane. Hence, this study proposes an advanced membrane design that can effectively mitigate organic fouling of separation membranes, thereby enhancing water purification efficiency and reducing membrane cleaning costs. © 2024, The Authors. All rights reserved.

关键词： Spray pyrolysis

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Influence of non-degradable and degradable microplastics on the bioavailability of per- and polyfluoroalkyl substance in mice: Mechanism exploration

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Science of the Total environment 2025年 977卷 179381页

作者： Zhou, Pengfei Kong, Yi Zhang, Dengke Juhasz, Albert Zhang, Qian Cui, Xinyi State Key Laboratory of Water Pollution Control and Green Resource Recycling School of the Environment Nanjing University Nanjing210023 China Future Industries Institute University of South Australia Mawson LakesSA5095 Australia

Per- and polyfluorinated alkyl substances (PFAS) contamination in drinking water and their associated health risks have received extensive global attention. Microplastics (MPs), which commonly coexist with PFAS in the daily diet, remain poorly understood in terms of their effects on PFAS bioavailability. Here, we investigated the effect of non-biodegradable (PS) and biodegradable (PBS) MPs on PFAS bioavailability using a mouse model, with PFAS level in drinking water being at 20 μg/L. High-dose dietary MPs (50 mg/g) significantly increased PFAS bioavailability, especially for PS co-exposure (29.2 ± 5.09 % vs 19.4 ± 3.66 % in control, p © 2025 Elsevier B.V.

关键词： Bioavailability Co-exposure Drinking water Microplastics PFAS

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Development of an Optimization-Driven Equilibrium Model for Managing Water Consumption and Their Socio-Economic Effects

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SSRN 2024年

作者： Li, Xiaoyang Huang, Guohe Wang, Shuguang Li, Yongping Zhang, Xiaoyue School of Environmental Science and Engineering Shandong University Qingdao266237 China Institute for Energy Environment and Sustainable Communities University of Regina ReginaSKS4S0A2 Canada Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China State Key Joint Laboratory of Environmental Simulation and Pollution Control China

In this study, an optimization-driven general water-management equilibrium model (OWCGE) is developed to facilitate collaborative governance of economy and water resources. The OWCGE will first regulate the strategic direction of water allocation through the development of a non-deterministic fractional optimization model, and then explore the responses of various sectors to different water policies through the computable general equilibrium (CGE) model. The main contribution of OWCGE is simultaneously addressing water allocation under the trade-offs between environmental protection and socio-economic development and tackling the impact of disturbances from one part of the economy on another. A case study of a highly urbanized province (i.e., Guangdong) in China is provided as an example for demonstrating the proposed approach. According to the results, the agricultural sector group should receive 46.9% of total water supply, followed by the industrial sector group with 20.3%. The results of scenario analysis indicate that when the water demand of the tertiary sector group increases by 10%, the total GDP would fall at the fastest rate. The increase in domestic water demand (20%) would result in economy losses in most sectors, and the degrees of such reductions are less than -1.1%. © 2024, The Authors. All rights reserved.

关键词： Economic and social effects

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Low-Concentration Organics Mitigate the Inhibition of Free Nitrous Acid on Nitrification in Biofilters for Gaseous Ammonia Removal

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SSRN 2023年

作者： Niu, Lishan Baig, Zenab Tariq Yeung, Marvin Soomro, Abdul F. Lu, Lichao Xi, Jinying South China University of Technology China Environmental Simulation and Pollution Control State Key Joint Laboratory School of Environment Tsinghua University Beijing100084 China School of Petrochemical Engineering and Environment Zhejiang Ocean University Zhoushan316004 China

Free nitrous acid (FNA) inhibition restricted the ammonia removal efficiency of bioreactors under a medium or high inlet ammonia loading, mainly by inhibiting nitrite-oxidizing bacteria (NOB) and ammonia-oxidizing bacteria (AOB). Three parallel ammonia removal biofilters with different inoculums were set in this study. When increasing the inlet ammonia loading rate to 21.8 ± 1.3 gN m-3 h-1, biofilters could merely remove 60.3 ± 10.0% of inlet ammonia since FNA inhibition became the main inhibitor of nitrifiers, due to the accumulation of intermediate products including NO2- and H+. To relieve FNA inhibition, low-concentration extraneous organic electron donors (C/N © 2023, The Authors. All rights reserved.

关键词： Nitrification

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New insights into the formation of ammonium nitrate from a physical and chemical level perspective

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Frontiers of environmental Science & Engineering 2023年第11期17卷 209-221页

作者： Yuting Wei Xiao Tian Junbo Huang Zaihua Wang Bo Huang Jinxing Liu Jie Gao Danni Liang Haofei Yu Yinchang Feng Guoliang Shi State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control Tianjin Key Laboratory of Urban Transport Emission ResearchCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China CMA-NKU Cooperative Laboratory for Atmospheric Environment-Health Research(CLAER) College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Institute of Resources Utilization and Rare Earth Development Guangdong Academy of SciencesGuangzhou 510650China Guangzhou Hexin Instrument Co.Ltd. Guangzhou 510530China State Key Laboratory of Precision Measuring Technology and Instruments Tianjin Key Laboratory of Air pollutants Monitoring TechnologySchool of Precision Instrument and Opto-electronics EngineeringTianjin UniversityTianjin 300072China Gigantic Technology(Tianjin)Co.Ltd. Tianjin 300384China Department of Civil Environmental and Construction EngineeringUniversity of Central FloridaOrlandoFL32816USA

High levels of fine particulate matter(PM_(2.5))is linked to poor air quality and premature deaths,so haze pollution deserves the attention of the *** abundant inorganic components in PM_(2.5),ammonium nitrate(NH_(4)NO_(3))formation includes two processes,the diffusion process(molecule of ammonia and nitric acid move from gas phase to liquid phase)and the ionization process(subsequent dissociation to form ions).In this study,we discuss the impact of meteorological factors,emission sources,and gaseous precursors on NH4NO3 formation based on thermodynamic theory,and identify the dominant factors during clean periods and haze *** show that aerosol liquid water content has a more significant effect on ammonium nitrate formation regardless of the severity of *** dust source is dominant emission source in clean periods;while a combination of coal combustion and vehicle exhaust sources is more important in haze *** the control of ammonia emission is more effective in reducing the formation of ammonium *** findings of this work inform the design of effective strategies to control particulate matter pollution.

关键词： Ammonium nitrate formation Thermodynamic theory Aerosol liquid water content Source apportionment

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Effects of carbon-silicon structure on photochemical activity of biochars

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Chemosphere 2024年 347卷 140719页

作者： Guo, Siwei Lu, Lun Chen, Baoliang Department of Environmental Science Zhejiang University Hangzhou310058 China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou310058 China State Environmental Protection Key Laboratory of Environmental Pollution Health Risk Assessment South China Institute of Environmental Sciences Ministry of Ecology and Environment Guangzhou510655 China

Biochar has raised increasing concerns because of its great environmental impacts. It is known that the photocatalytic property of biochar is related to its carbon component and dissolved black carbon, but the effect of silicon component is ignored, and the effect of silicon and carbon phases was far less studied. This study systematically explored the photochemistry of silicon-rich and silicon-deficient biochar under light irradiation by using hexavalent chromium (Cr(VI)) and sulfadiazine as representative pollutants for photoreduction and photooxidation, respectively. It was found that biochar had photoreduction activity under the enhancement of electron donors, and 80.1% Cr(VI) can be removed by biochar with crystalline silicon and carbon (i.e., RH900) after 12 h irradiation. Meanwhile after low temperature pyrolysis, biochar with amorphous silicon and carbon (i.e., RH600) had great photooxidation capacity, and 71.90% organic pollutant was degraded within 24 h. The reaction was illustrated by transient photocurrent response, and hydroxyl radical generation measurement, and other tests. A new photochemical mechanism of the synergy between silicon and carbon model was proposed to elucidate the redox reactions of pollutants under the light. Graphitic carbon or crystalline silicon formed under high temperature played a role of valence band which was excited under light irradiation and the effect of electron donors to benefit photoreduction, while amorphous silicon formed under low temperature facilitated photooxidation process by increasing reactive oxygen species concentration. This study provided a gist for biochar production and application in the field of photocatalysis, and contributed to the broader understanding of biochar geochemical behavior in natural sunlit system. © 2023 Elsevier Ltd

关键词： Photooxidation

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Facet-controlled LiMn_(2)O_(4)/C as Deionization Electrode with Enhanced Stability and High Desalination Performance

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Nano-Micro Letters 2022年第11期14卷 75-86页

作者： Yuxin Jiang Liyuan Chai Dehe Zhang Fangping Ouyang Xiangyuan Zhou Sikpaam IAlhassan Sailin Liu Yingjie He Lvji Yan Haiying Wang Wenchao Zhang School of Metallurgy and Environment Central South UniversityChangsha 410083People’s Republic of China Chinese National Engineering Research Center for Control and Treatment of Heavy Metal Pollution Changsha 410083People’s Republic of China Water Pollution Control Technology Key Lab of Hunan Province Changsha 410083People’s Republic of China School of Physics and Electronics Hunan Key Laboratory for Super-Microstructure and Ultrafast Processand Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083People’s Republic of China State Key Laboratory of Powder Metallurgy and Powder Metallurgy Research InstituteCentral South UniversityChangsha 410083People’s Republic of China School of Chemical Engineering and Advanced Materials Faculty of SciencesEngineering and TechnologyThe University of AdelaideAdelaide 5005Australia

Battery materials as emerging capacitive deionization electrodes for desalination have better salt removal capacities than traditional carbon-based ***_(2)O_(4),a widely used cathode mate-rial,is difficult to utilize as a deionization electrode due to its structural instability upon cycling and Mn dissolution in aqueous-based ***,a facile and low-cost ball-milling routine was proposed to prepare a LiMn_(2)O_(4)material with highly exposed(111)*** prepared electrode exhibited relatively low dissolution of Mn during cycling,which shows its long cycle *** the hybrid capacitive deionization system,the LiMn_(2)O_(4)/C electrode delivered a high desalination capacity of 117.3 mg g^(−1) without obvious capacity decay at a voltage of 1.0 V with a 20 mM initial salt *** addition,the exposed(111)facets significantly alleviated Mn ion dissolution,which also enhanced the structural steadiness.

关键词： Deionization electrode Desalination Lithium-ion battery

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Water-level based discrete integrated dynamic control to regulate the flow for sewer-WWTP operation

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Frontiers of environmental Science & Engineering 2020年第3期14卷 103-111页

作者： Zhengsheng Lu Moran Wang Mingkai Zhang Ji Li Ying Xu Hanchang Shi Yanchen Liu Xia Huang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China School of Environment and Civil Engineering Jiangnan UniversityWuxi 214122China Wuxi Water Group Co.Ltd. Wuxi 214031China

This study aims to propose a multi-point integrated real-time control method based on discrete dynamic water level variations,which can be realized only based on the programmable logic controller(PLC)system without using a complex mathematical model.A discretized water level control model was developed to conduct the real-time control based on *** combines the upstream pumping stations and the downstream influent pumping systems of wastewater treatment plant(WWTP).The discretized water level control method can regulate dynamic wastewater pumping flow of pumps following the dynamic water level variation in the sewer *** control method has been successfully applied in practical integrated operations of sewer-WWTP following the sensitive flow disturbances of the sewer *** operational results showed that the control method could provide a more stabilized regulate pumping flow for treatment process;it can also reduce the occurrence risk of combined sewer overflow(CSO)during heavy rainfall events by increasing transport capacity of pumping station and influent flow in WWTP,which takes full advantage of storage space in the sewer system.

关键词： Sewer system Integrated control Discrete control Water level

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Spatial distribution and risk assessments of mercury in topsoils of Central Asia

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Geoscience Frontiers 2023年第4期14卷 270-279页

作者： Zhengzheng Yang Junming Guo Shiwei Sun Dingming Ni Pengfei Chen Dipesh Rupakheti Huhu Kang Sabur F Abdullaev Salamat Abdyzhapar uulu Shichang Kang Key Laboratory of Western China's Environmental Systems(Ministry of Education) College of Earth and Environmental SciencesLanzhou UniversityLanzhou 730000China State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing 210044China S.U.Umarov Physical Technical Institute of the National Academy of Sciences of Tajikistan Dushanbe 734063Tajikistan Research Center for Ecology and Environment of Central Asia(Bishkek) 720001Kyrgyzstan Geography Department Geology InstituteNational Academy of Sciences720001Kyrgyzstan

Central Asia is one of the largest arid areas on earth,yet little is known about the concentration levels and risks of mercury(Hg)in the soils of this *** this study,extensive sampling of topsoils(0-10 cm)from representative landscapes was carried out over Central Asia(i.e.,Tajikistan,Uzbekistan,and Kyrgyzstan).The total mercury(THg)concentrations in topsoils varied widely from 1.6 to 908.0 ng/g,with high values observed in samples collected in the capital cities and urban *** THg concentrations among different landscapes showed a decreasing order of urban(79.8±184.0 ng/g)>woodland(27.3±28.9 ng/g)>grassland(20.6±15.9 ng/g)>farmland(18.3±9.5 ng/g)>desert(12.3±8.0 ng/g).High THg concentrations were found in the capital cities/urban clusters,followed by a gradual decrease towards the *** concentrations were found to be negatively correlated with the distance from the sampling sites to their nearest cities,indicating that anthropogenic emissions significantly influenced the spatial distribution of topsoil Hg.A significant correlation between THg concentrations and topsoil total organic carbon(TOC)contents was also observed,suggesting that TOC played an essential role in the spatial distribution of topsoil *** assessments of pollution and potential ecological risk suggested that topsoils in highly densely-populated areas were contaminated by Hg and had higher degrees of potential ecological *** health risk assessment results showed that the exposure risk of topsoil Hg to children was higher than that to ***,there was no unacceptable human health risk of topsoil *** study clarified the spatial distribution and risks of Hg in the Central Asian topsoils,offering new insight into the risk prevention and control of soil Hg.

关键词： Mercury Topsoil Landscape Spatial distribution Risk assessment Central Asia

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Rapid humification of cotton stalk catalyzed by coal fly ash and its excellent cadmium passivation performance

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environmental Science and pollution Research 2024年第39期31卷 52582-52595页

作者： Zhou, Hao Dang, Yan Chen, Xinyu Ivanets, Andrei Ratko, Alexander A. Kouznetsova, Tatyana Liu, Yongqi Yang, Bo Zhang, Xulong Sun, Yiwei He, Xiaoyan Ren, Yanjie Su, Xintai School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangdong Guangzhou510006 China State Scientific Institution "Institute of General and Inorganic Chemistry of National Academy of Sciences of Belarus" Minsk220072 Belarus China Customs Science and Technology Research Center Beijing100026 China Xinjiang Key Laboratory of Clean Conversion and High Value Utilization of Biomass Resources School of Chemistry and Environmental Sciences Yili Normal University Yining Xinjiang835000 China Xinjiang Qinghua Energy Group Co. Ltd Yining Xinjiang844500 China

Due to industrialization, soil heavy metal pollution is a growing concern, with humic substances (HS) playing a pivotal role in soil passivation. To address the long duration of the compost humification problem, coal fly ash (CFA) in situ catalyzes the rapid pyrolysis of the cotton stalk (CS) to produce HS to address Cd passivation. Results indicate that the highest yield of humic acid (HA) (8.42%) and fulvic acid (FA) (1.36%) is obtained when the CS to CFA mass ratio is 1:0.5, at 275 ℃ for 120 min. Further study reveals that CFA catalysis CS humification, through the creation of alkaline pyrolysis conditions, Fe2O3 can stimulate the protein and the decomposition of hemicellulose in CS, and then, through the Maillard and Sugar-amine condensation reaction synthesis HA and FA. Applying HS-CS&CFA in Cd-contaminated soil demonstrates a 26.69% reduction in exchangeable Cd within 30 days by chemical complexation. Excellent maize growth effects and environmental benefits of HS products are the prerequisites for subsequent engineering applications. Similar industrial solid wastes, such as steel slag and red mud, rich in Fe2O3, can be explored to identify their catalytic humification effect. It could provide a novel and effective way for industrial solid wastes to be recycled for biomass humification and widely applied in remediating Cd-contaminated agricultural soil. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Slags

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