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Insight into the effects of C_(3)H_(6)on fresh and hydrothermally aged Cu-SSZ-39 catalysts

Chinese Chemical Letters 2025年第3期36卷 164-169页

作者： Jinpeng Du Junlin Chen Yulong Shan Tongliang Zhang Yu Sun Zhongqi Liu Xiaoyan Shi Wenpo Shan Yunbo Yu Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341119China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Hydrocarbons(HCs),as major poisoning substances,have a crucial influence on NH_(3)-SCR *** this work,the effects of C_(3)H_(6)on fresh and hydrothermally aged Cu-SSZ-39 catalysts with different copper contents were *** catalysts suffered a deactivation above 250℃,especially between 300-400℃,which was mainly related to the reaction between NH_(3)and C_(3)H_(6).However,the hydrothermally aged and the high-copper-loaded Cu-SSZ-39 catalysts could achieve a recovery of NH_(3)-SCR performance at high *** activity recovery was attributed to the oxidation of C_(3)H_(6)by CuxOy species,which therefore inhibited the reaction between NH_(3)and C_(3)H_(6).As a result,more NH_(3)could be available for the NH_(3)-SCR reaction and the Cu-SSZ-39 catalysts could maintain a good catalytic *** on these findings,we proposed that high loaded Cu-SSZ-39 catalysts with a little CuOx formed are preferred for application.

关键词： Diesel vehicle emission NO_(x)abatement NH3-SCR Cu-SSZ-39 zeolite C_(3)H_(6)poisoning

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Deciphering environmental factors influencing phytoplankton community structure in a polluted urban river

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Journal of Environmental Sciences 2025年第2期148卷 375-386页

作者： Xiaxia Li Kai Chen Chao Wang Tianyu Zhuo Hongtao Li Yong Wu Xiaohui Lei Ming Li Bin Chen Beibei Chai School of Water Conservancy and Hydroelectric Power Hebei University of EngineeringHandan 056038China Collaborative Innovation Center for Intelligent Regulation and Comprehensive Management of Water Resources School of Water Conservancy and HydroelectricHebei University of EngineeringHandan 056038China Hebei Key Laboratory of Intelligent Water Conservancy Hebei University of EngineeringHandan 056038China Tianjin Water Group Binhai Water Co. Ltd.Tianjin 300308China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China School of Architecture and Civil Engineering Xi’an University of Science and TechnologyXi’an 710054China Chengdu University of Technology Chengdu 610059China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China

Tuojiang River basin is a first-class tributary of the upper reaches of the Yangtze River—which is the longest river in *** phytoplankton are sensitive indicators of trophic changes inwater bodies,characterizing phytoplankton communities and their growth influencing factors in polluted urban rivers can provide new ideas for pollution ***,we used direct microscopic count and environmental DNA(eDNA)metabarcoding methods to investigate phytoplankton community structure in Tuojiang River basin(Chengdu,Sichuan Province,China).The association between phytoplankton community structure and water environmental factors was evaluated by Mantel *** environmental monitoring data were used to pinpoint major factors that influenced phytoplankton growth based on structural equation *** the phylum level,the dominant phytoplankton taxa identified by the conventional microscopic method mainly belonged to Bacillariophyta,Chlorophyta,and Cyanophyta,in contrast with Chlorophyta,Dinophyceae,and Bacillariophyta identified by eDNA ***α-diversity analysis,eDNA metabarcoding detected greater species diversity and achieved higher precision than the microscopic *** growth was largely limited by phosphorus based on the nitrogen-to-phosphorus ratios>16:1 in all water *** analysis and structural equation modeling also confirmed that the nitrogen-to-phosphorus ratio was the principal factor influencing phytoplankton *** results could be useful for implementing comprehensive management of the river basin *** is recommended to control the discharge of point-and surface-source pollutants and the concentration of dissolved oxygen in areas with excessive nutrients(e.g.,Jianyang-Ziyang).Algae monitoring techniques and removal strategies should be improved in 201 Hospital,Hongrihe Bridge and Colmar Town areas.

关键词： Environmental DNA Microscopic count Phytoplankton growth Structural equation modeling Tuojiang River basin

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Comprehensive review of ecological risks and toxicity mechanisms of microplastics in freshwater: Focus on zebrafish as a model organism

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Aquatic Toxicology 2025年 284卷 107397页

作者： Sha, Haichao Li, Xi Li, Qi Zhang, Jingwei Gao, Ji Ge, Lukun Wang, Weinan Zeng, Taotao Xi'an Key Laboratory of Environmental Simulation and Ecological Health in the Yellow River Basin College of Urban and Environmental Sciences Northwest University Xi'an 710127 China Hunan Province Key Laboratory of Pollution Control and Resources Reuse Technology University of South China Hunan Hengyang 421001 China

Zebrafish, as a model organism, exhibit high sensitivity to environmental pollutants and has been widely used in microplastics (MPs) toxicology studies. However, the mechanisms underlying MPs’ effects on zebrafish have yet to be comprehensively summarized. This review systematically explores the sources, pollution status of freshwater MPs and their biological toxicity mechanisms using zebrafish as a model organism. This analysis reveals that the primary sources of MPs include sediment release, natural degradation of plastic products, and precipitation-mediated transport. Freshwater MPs predominantly comprise of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), polystyrene (PS), and polyvinyl chloride (PVC). These MPs typically appear transparent, white, black, or blue, and predominantly exist as fibers, films, fragments, foams, and particles. The concentration, size, shape, type, aging status, and loading capacity of MPs can induce developmental malformations in zebrafish embryos, including pericardial and yolk sac edema. In adult zebrafish, MPs cause intestinal injuries characterized by increased permeability, impaired barrier function, and microbiota dysbiosis. MPs exposure also induces behavioral abnormalities such as reduced locomotion and anxiety-like responses, while simultaneously provoking oxidative stress and immune-inflammatory reactions. The physical mechanism of MPs-induced toxicity in zebrafish involves particle accumulation and tissue abrasion. In contrast, physiological and molecular mechanisms encompass interactions between MPs’ surface functional groups and biological tissues, alterations in oxidative stress markers, enzymatic activity and cytokine profiles, and modulation of gene expression patterns. This review synthesizes current knowledge on the ecological risks of freshwater MP pollution and its toxicological impacts on zebrafish, thereby providing a comprehensive framework for understanding MP toxicity mechanisms. © 2025

关键词： Danio rerio Molecular actions Physical action Physiological pollution status Sources

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Dynamic regulation strategies of cation exchange resin enhancing volatile fatty acids production in anaerobic fermentation of waste activated sludge: Performance and mechanisms

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Chemical Engineering Journal 2025年 516卷

作者： Shifa Huang Jincai Luo Xinyun Wang Jingying Liao Shanyan Dong Yichun Zhu Jiangxi University of Science and Technology Ganzhou 341000 China Jinggangshan University Affiliated Hospital Ji’an 343000 China Jiangxi Province Ganzhou Key Laboratory of Basin Pollution Simulation and Control Ganzhou 341000 China Jiangxi Provincial Key Laboratory of Environmental Geo-technology and Engineering Disaster Control Ganzhou 341000 China

Addressing the challenge of metal ion-mediated floc stability limiting organic matter release and product-directed control during the anaerobic fermentation of waste activated sludge (WAS), this study proposes a dynamic regulation strategy using cation exchange resins (CER). By comparing staged treatment (CER separation post-pretreatment) with full-cycle treatment (continuous CER involvement), the study systematically deciphers the synergistic mechanisms under CER dynamic control. These include substantial metal removal, enhanced solubilization of organic matter (with soluble chemical oxygen demand peaks reaching 3.49 times that of the control group), and restructuring of the microbial community (with a 4.18-fold increase in the abundance of acetogenic bacteria from the Petrimonas ). The full-cycle treatment group (3.4 g CER/g TS) reached a volatile fatty acids (VFAs) production of 1591.51 mg/L, which is 9.84 times that of the control group, with acetic acid comprising 72.13 %. Through reversible ion exchange maintaining metal balance, the II-1 group (low dosage, extended retention) showed an 18.02 % increase in methane production (478.7 mL). High-throughput sequencing analysis reveals that the sustained action of CER activates key genes in glycolysis and pyruvate oxidation (with a 3.58–19.66 % increase in related gene expression) and inhibits the acetic acid cleavage pathway (downregulation of the cdh gene by 5.40–6.08 %), driving metabolism towards acetic acid accumulation, thus constructing a “hydrolysis-enhanced − acetate accumulation − methane suppression” cascading metabolic network. The dynamic control of CER through a “metal deficit − enzyme activity compensation − functional microbial community acclimation” cascading effect achieves either “carbon-source priority” or “energy balance” in product-directed transformation.

关键词：

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Tannic acid/Fe^(3+)interlayer for preparation of high-permeability polyetherimide organic solvent nanofiltration membranes for organic solvent separation

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Chinese Journal of Chemical Engineering 2023年第5期57卷 17-29页

作者： Haike Li Xindong Li Guozai Ouyang Lang Li Zhaohuang Zhong Meng Cai Wenhao Li Wanfu Huang Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Innovation Center for Water Quality Security Technology at Ganjiang River Basin Jiangxi University of Science and TechnologyGanzhou 341000China School of Civil and Surveying&Mapping Engineering Jiangxi University of Science and TechnologyGanzhou 341000JiangxiChina

Organic solvent nanofiltration(OSN)membranes have a great application prospect in organic solvent separation,but the development of OSN membranes is mainly restricted by trade-off between permeability and rejection *** this work,a TA/Fe^(3+)polymer was introduced into polyetherimide(PEI)ultrafiltration membranes crosslinked with hexamethylene diamine as the intermediate layer,and OSN membranes with high separation performance and solvent permeability were obtained through interfacial polymerization and solvent *** interlayer with high surface hydrophilicity and a fixed pore structure controlled the adsorption/diffusion of the amine monomer during interfacial polymerization,forming a smooth(average surface roughness<5.5 nm),ultra-thin(separation layer thickness reduced from 150 to 16 nm)and dense surface structure polyamide(PA)*** PA-Fe^(3+)_3-HDA/PEI membrane retained more than 94%of methyl blue(BS)in 0.1 g·L^(-1)BS ethanol solution at 0.6 MPa,and the ethanol permeation reached 28.56 L^(-1)·m^(-2)·h^(-1).The average flux recovery ratio(FRR)of PA-Fe^(3+)_(3)-HDA/PEI membrane was found to be 84%,which has better fouling resistance than PA-HDA/PEI membrane,and it was found to have better stability performance through different solvent immersion experiments and continuous operation in 0.1 g·L^(-1)BS ethanol *** with thin-film composite nanofiltration membranes,the PA-Fe^(3+)_(3)-HDA/PEI membrane can be manufactured from an economical and environment-friendly method and overcomes the trade-off between permeability and rejection rate,showing great application potential in organic solvent separation systems.

关键词： Nanofiltration membrane Waste treatment Surface Filtration Tannic acid Interfacial polymerization

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Evidence of sewage discharge on the coalescence mechanism of aquatic microbial communities during high amplitude hydrological periods

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Science of the Total Environment 2025年 959卷 178223页

作者： Kou, Xin Huang, Shier Bian, Rui Tang, Qingwen Wang, Hui Liu, Song Wang, Li Qi, Weixiao Cao, Xiaofeng Lan, Huachun Liu, Huijuan Qu, Jiuhui Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Center for Ecological Civilization Tsinghua University Beijing100084 China Center of Tsinghua Think Tanks Tsinghua University Beijing100084 China School of Environment Northeast Normal University Changchun130117 China Co. Ltd. Zunyi564501 China Chishui River Middle Basin Watershed ecosystem Observation and Research Station of Guizhou Province Zunyi564501 China

Microbial community coalescence is a ubiquitous ecological process in various ecosystems. However, limited research has addressed the effects of the coalescence on microbial ecological processes and network structure, particularly in the context of sewage discharge during high amplitude hydrological periods. Employing 16S rRNA sequencing and species source tracking analysis, we investigated the coalescence pattern of bacterioplankton in the Chishui river and sewage across various hydrological periods. The results demonstrated that the downstream bacterioplankton mainly originated from the upstream water body, and the sewage discharge from the wastewater treatment plants (WWTPs) had less impact on the downstream bacterioplankton. In the low-water period, the bacterioplankton community showed significant coalescence, and the specialist species and functional taxa gathered in the downstream. Bacterioplankton displayed distinct ecological succession patterns after community coalescence, with notable variations in the abundance of dominant group. Bacterioplankton community assembly was dominated by stochastic processes in river and the sewage over different hydrological periods. The ecological networks exhibited the highest complexity in the high-water period, whereas their stability was most pronounced in the low-water period. Species diversity, as opposed to functional and phylogenetic diversity, might be a more accurate indicator to predict changes in microbial network structure. Our findings will provide new perspectives on the mechanisms of aquatic microbial community coalescence in natural environments. © 2024 Elsevier B.V.

关键词： Anthropogenic

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Interactions between H_(2)O_(2)and dissolved organic matter during granular activated carbon-based residual H_(2)O_(2)quenching from the upstream UV/H_(2)O_(2)process

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Journal of Environmental Sciences 2023年第6期128卷 139-149页

作者： Yaoyao Kang Junfeng Lian Yichun Zhu Zuwen Liu Wentao Li Huiyu Dong Yuanyue Wang Jinfeng Zeng Zhimin Qiang Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and TechnologyGanzhou 341000China Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China CECEP Environmental Protection Investment Development(Jiangxi)Co.Ltd. Nanchang 330006China Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed Ganzhou 341000China

Granular activated carbon(GAC)filtration can be employed to synchronously quench residual H_(2)O_(2)from the upstream UV/H_(2)O_(2)process and further degrade dissolved organicmatter(DOM).In this study,rapid small-scale column tests(RSSCTs)were performed to clarify the mechanisms underlying the interactions between H_(2)O_(2)and DOM during the GAC-based H_(2)O_(2)quenching *** was observed that GAC can catalytically decompose H_(2)O_(2),with a long-lasting high efficiency(>80%for approximately 50,000 empty-bed volumes).DOM inhibited GAC-based H_(2)O_(2)quenching via a pore-blocking effect,especially at high concentrations(10 mg/L),with the adsorbed DOM molecules being oxidized by the continuously generated·OH;this further deteriorated the H_(2)O_(2)quenching *** batch experiments,H_(2)O_(2)could enhance DOM adsorption by GAC;however,in RSSCTs,it deteriorated DOM *** observation could be attributed to the different·OH exposure in these two *** was also observed that aging with H_(2)O_(2)and DOM altered the morphology,specific surface area,pore volume,and the surface functional groups of GAC,owing to the oxidation effect of H_(2)O_(2)and·OH on the GAC surface as well as the effect of ***-tionally,the changes in the content of persistent free radicals in the GAC samples were insignificant following different aging *** work contributes to enhancing understanding regarding the UV/H_(2)O_(2)-GAC filtration scheme,and promoting the application in drinking water treatment.

关键词： Granular activated carbon H_(2)O_(2)quenching Dissolved organic matter Rapid small-scale column tests Persistent free radicals

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Layout effects and optimization of runoff storage and filtration facilities based on SWMM simulation in a demonstration area

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Water Science and Engineering 2016年第2期9卷 115-124页

作者： Wei Xing Peng Li Shang-bing Cao Li-li Gan Feng-lin Liu Jian-e Zuo State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Tsinghua University School of Civil Engineering Beijing Jiaotong University State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research

The layout effects and optimization of runoff storage and filtration facilities are crucial to the efficiency and management of the cost of runoff control, but related research is still lacking. In this study, scenarios with different layouts were simulated using the storm water management model(SWMM), to investigate the layout effects on control efficiency with different precipitations. In a rainfall event with 50 mm of precipitation in two hours, 1820 scenarios with different layouts of four facilities constructed in 16 sub-catchments were simulated, the reduction rates of internal flow presented a standard deviation of 10.9%, and the difference between the maximum and minimum reduction rates reached59.7%. Based on weighting analysis, an integrated ranking index was obtained and used to determine the optimal layout scenarios considering different rainfall events. In the optimal scenario(storage and filtration facilities constructed in sub-catchments 14, 12, 7, and 2), the reduction rates of the total outflow reached 31.4%, 26.4%, and 14.7%, respectively, with 30, 50, and 80 mm of precipitation. The reduction rate of the internal outflow reached 95% with 50 mm of precipitation and approximately 56% with 80 mm of precipitation.

关键词： Layout Optimization Rainwater storage pond Stormwater control Storm water management model (SWMM)

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Exploring price effects on the residential water conservation technology diffusion process： a case study of Tianjin city

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Frontiers of Environmental Science & Engineering 2013年第5期7卷 688-698页

作者： Junying CHU Hao WANG Can WANG State Key Laboratory of Simulation and Regulation of River Basin Water Cycle China Institute of Water Resources and Hydropower Research Beijing 100038 China State Key Laboratory of Environment Simulation and Pollution Control (SKLESPC) School of Environment Tsinghua University Beijing 100084 China

Reforms of the water pricing management system and the establishment of a flexible water pricing system are significant for cities in northern China to tackle their critical water issues. The WATAP （Water conserva- tion Technology Adoption Processes） model is developed in order to capture the water conservation technology adoption process under different price scenarios with disaggregate water demands down to the end use level. This model is explicitly characterized by the technological selection process under maximum marginal benefit assumption by different categories of households. In particular, when households need to purchase water devices in the provision market with the consideration of complex factors such as the life span, investment and operating costs of the device, as well as the regulated water price by the government. Applied to Tianjin city, four scenarios of water price evolutions for a long-term perspective （from year 2011 to 2030） are considered, including BAU （Business As Usual）, SP1 （Scenario of Price increase with constant annual rate）, SP2 （Scenario of Price increase every four years） and SP3 （Scenario of Price increase with affordable constraint）, considering many factors such as historic trends, affordability and incentives for conservation. Results show that on aggregate 2.3%, 11.0% and 18.2% of fresh water can be saved in the residential sector in scenario SP1, SP2 and SP3, respec- tively, compared with the BAU scenario in the year 2030. The water price signals can change the market shares of different water appliances, as well as the water end use structure of households, and ultimately improve water use efficiency. The WATAP model may potentially be a helpful tool to provide insights for policy makers on water conservation technology policy analysis and assessment.

关键词： technology selection model optimization,water price scenario analysis consumer behavior

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Ultrathin organic solvent nanofiltration membrane with polydopamine-HKUST-1 interlayer for organic solvent separation

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Journal of Environmental Sciences 2024年第7期141卷 182-193页

作者： Haike Li Xindong Li Guozai Ouyang Lijinhong Huang Lang Li Wenhao Li Wanfu Huang Duokun Li Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and TechnologyGanzhou 341000China Innovation Center for Water Quality Security Technology at Ganjiang River Basin Jiangxi University of Science and TechnologyGanzhou 341000China School of Architecture and Design Jiangxi University of Science and TechnologyGanzhou 341000China WA School of Mines:Minerals Energy and Chemical EngineeringCurtin UniversityWA 6845Australia School of Materials Science and Engineering Tiangong UniversityTianjin 300387China

Polydopamine(PDA)and metal-organic skeleton HKUST-1 were co-deposited on the base membrane of hexamethylenediamine(HDA)-crosslinked polyetherimide(PEI)ultrafiltration membrane as the interlayer,and high-throughput organic solvent nanofiltration membrane(OSN)was prepared by interfacial polymerization and solvent activation *** polyamide(PA)layer surface roughness from 28.4 nm in PA/PEI to 78.3 nm in PA/PDA-HKUST-10.6/PEI membrane,reduced the thickness of the separation layer from 79 to 14 nm,and significantly improved the hydrophilic,thermal and mechanical *** flux of the PA/PDA-HKUST-10.6/PEI membrane in a 0.1 g/L Congo Red(CR)ethanol solution at 0.6 MPa test pressure reached 21.8 L/(m^(2)·hr)and the rejection of CR was 92.8%.Solvent adsorption test,N,N-dimethylformamide(DMF)immersion experiment,and long-term operation test in ethanol showed that the membranes had high solvent *** solvent flux test demonstrated that,under the test pressure of 0.6 MPa,the flux of different solvents ranked as follows:methanol(56.9 L/(m^(2)·hr))>DMF(39.6 L/(m^(2)·hr))>ethanol(31.2 L/(m^(2)·hr))>IPA(4.5 L/(m^(2)·hr))>N-hexane(1.9 L/(m^(2)·hr)).The ability of the membranes to retain dyes in IPA/water dyes solution was also *** flux of the membrane was 30.4 L/(m^(2)·hr)and the rejection of CR was 91.6%when the IPA concentration reached 50%.This OSN membrane-making strategy is economical,environment-friendly and efficient,and has a great application prospect in organic solvent separation systems.

关键词： Interfacial polymerization Organic solvent nanofiltration Interlayer Metal-organic frameworks Polydopamine

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