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SSRN 2024年

作者： Lai, Yafen Zhu, Yichun Li, Xiaochao Zhang, Guangming Lian, Junfeng Wang, Shihao Tang, Cong Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control Jiangxi University of Science and Technology Ganzhou341000 China Jiangxi Provincial Key Laboratory of Water Ecological Conservation at Headwater Regions Jiangxi University of Science and Technology Ganzhou341000 China School of Energy & Environmental Engineering Hebei University of Technology Tianjin300401 China Jiangxi Province Ganzhou Key Laboratory of Basin Pollution Simulation and Control China

Low-intensity ultrasound, as a form of biological enhancement technology, holds significant importance in the field of biological nitrogen removal. This study utilized low-intensity ultrasound to enhance partial nitrification and investigated its impact on sludge structure, as well as the internal relationship between structure and properties. The results demonstrated that ultrasound induced a higher concentration of nitrite in the effluent, accompanied by a 67.76% increase in the activity of ammonia monooxygenase (AMO) and a 41.12% increase in the activity of hydroxylamine oxidoreductase (HAO), benefiting the partial nitrification. Based on the extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theoretical analysis, ultrasonic treatment enhanced the electrostatic interaction energy (WR) between sludge particles, consequently leading to the loosening of the sludge structure. This structural alteration was primarily attributed to the fact that the tightly bonded extracellular polymer (TB-EPS) after ultrasound was found to increase hydrophilicity and negative charge, weakening the adsorption between sludge cells. In summary, this study elucidated that the change in sludge structure caused by ultrasonic treatment has the potential to enhance the nitrogen removal performance of partial nitrification. © 2024, The Authors. All rights reserved.

关键词： Nitrogen removal

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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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Study on Adsorption of Heavy Metals Cu and Zn by Microplastics Under Different Aged Factors

Study on Adsorption of Heavy Metals Cu and Zn by Microplasti...

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作者： Wenxi Teng Xiang Zhang Yalin Yang Jinfeng Zeng Junfeng Lian Xinxin Qin Ganzhou Key Laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and Technology Hydrology and Water Resources Monitoring Center for Ganjiang Upstream Watershed Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control Jiangxi University of Science and Technology

Microplastics are widely distributed in a variety of environments,absorbing heavy metals in the environment while aging due to various environmental *** this paper,the effects of different aging factors（pH,DOM,and HO） on the adsorption capacity of heavy metals Cu and Zn on polyethylene microplastics（PE-MPs） were investigated,and the changes in physical and chemical properties of PE microplastics were *** results demonstrate that HO aging bears the greatest effect on the adsorption effect of PE microplastics,dissolved organic matter（DOM） aging has the least effect on the adsorption effect of PE microplastics,and the adsorption effect of microplastics aged with pH=9 is stronger than that aged with pH=4;the adsorption kinetics model of microplastics fitted to the pseudo-second-order kinetic model,and the thermodynamic model fitted to Langmuir model;aging mainly changed the surface structure of microplastics,increased the Zeta potential of microplastics,introduced more oxygen-containing functional groups,and finally affected the ability of microplastics to adsorb heavy *** research provides data reference for understanding the influence of different aging on the adsorption capacity of heavy metals in microplastics.

关键词： Study on Adsorption of Heavy Metals Cu and Zn by Microplastics Under Different Aged Factors

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Identifying priority areas of Four Major Chinese carps’ species in the Pearl River basin based on the MaxEnt model

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Watershed Ecology and the Environment 2023年第1期5卷 18-23页

作者： Shao, Xiaojing Liu, Xing Cai, Jie Cai, Yanzi Cui, Baoshan Research Center for Monitoring and Environmental Sciences Taihu Basin & East China Sea Ecological Environment Supervision and Administration Authority Ministry of Ecology and Environment of the People's Republic of China Shanghai 200125 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China

The Pearl River basin (PRB) is an important producing area and the gene pool of wild resources of Four Major Chinese carps (FMCC). However human activities and climate changes causes the area shrink of the river network in PRB, the pollution aggregation, the serious habitat destroy of aquatic organisms, and the threat of biological resources and their living environment. Based on the accurate location and distribution data of FMCC from the literature and the field survey report of 2015–2016, this study used the MaxEnt model to predict the hot spot distribution area of FMCC in PRB. The simulation results show that the distribution of FMCC in the PRB gradually increases from the upper reaches to the middle and lower reaches. According to the MaxEnt model, the hot spots of FMCC in the PRB are mainly distributed in the south reaches and the lower reaches of the southeast. The model simulation also demonstrates that the hottest spots for the distribution of FMCC species in the PRB are the Yujiang basin, the Qianjiang basin and the lower reaches of the Xijiang basin. This study can provide the scientific guidance for the protection and the restoration of FMCC species in the PRB. © 2022 The Authors

关键词： Biodiversity MaxEnt model Pearl River basin Prior conservation area

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Ultrathin Organic Solvent Nanofiltration with Polydopamine-Hkust-1 Interlayer for Organic Solvent Separation

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SSRN 2022年

作者： Li, Haike Ouyang, Guozai Li, Xindong Li, Lang Zhong, Zhaohuang Cai, Meng Li, Wenhao Huang, Wanfu Ganzhou key laboratory of Basin Pollution Simulation and Control Jiangxi University of Science and Technology Ganzhou341000 China Innovation Center for Water Quality Security Technology at Ganjiang River Basin Jiangxi University of Science and Technology Ganzhou341000 China

Organic solvent nanofiltration (OSN) membranes with high permeation flux were prepared by introducing polydopamine (PDA)-HKUST-1 as an interlayer onto a hexamethylenediamine (HDA) cross-linked polyetherimide (PEI) ultrafiltration base membrane through interfacial polymerization reaction and solvent activation. The introduction of the PDA-HKUST-1 interlayer improved the polyamide (PA) layer surface roughness from 28.4 nm in PA/PEI to 78.3 nm in PA/PDA-HKUST-10.6/PEI, reduced the thickness of the separation layer from 79 to 14 nm, and significantly improved the hydrophilic, thermal and mechanical properties. The flux of the PA/PDA-HKUST-10.6/PEI membrane in a 0.1 g/L Congo red (CR) ethanol solution reached 21.8 L·m-2·h-1 and the retention rate of CR was 92.8 %. Solvent adsorption test, n-dimethlformamide (DMF) immersion experiment, and long-term operation test in ethanol showed that the membranes had high solvent tolerance. The solvent flux test demonstrated the permeation flux (L·m-2·h-1) of different solvents ranked as methanol (56.9) > DMF (39.6) > ethanol (31.2) > isopropyl alcohol (IPA) (4.5) > hexane (1.9) >hexane (1.9). The ability of the membranes to treat 5% to 50% IPA wastewater was also evaluated. The permeation flux of the membrane was 30.4 L·m-2·h-1 and the retention of CR was 91.6% when the IPA concentration reached 50% © 2022, The Authors. All rights reserved.

关键词： Organic solvents

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Biodiversity conservation and ecological restoration of vulnerable ecosystems in the Anthropocene

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Journal of Plant Ecology 2024年第5期17卷 1-4页

作者： Zhonghua Ning Tian Xie Xinxin Wang Zhenchang Zhu Cong Chen Baoshan Cui Key Laboratory of Ecological Protection in the Yellow River Basin of National Forestry and Grassland Administration School of Ecology and Nature ConservationBeijing Forestry UniversityBeijing 100083China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering National Observations and Research Station for Wetland Ecosystems of the Yangtze EstuarySchool of Life ScienceFudan UniversityShanghai 200433China School of Ecology Environment and ResourcesGuangdong University of TechnologyGuangzhou 510006China Research and Development Center for Watershed Environmental Eco-engineering Advanced Institute of Natural SciencesBeijing Normal UniversityZhuhai 519087China

This editorial summarizes the contributions to the Special Issue Biodiversity conservation and ecological restoration of vulnerable ecosystems in the Anthropocene',established under the Journal of Plant Ecology.

关键词： Biodiversity ecosystems restoration

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From the headwaters to the sea:The role of riparian,alluvial,and tidal wetlands to filter nutrients and ameliorate eutrophication

River

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River 2022年第2期1卷 133-141页

作者： Christopher B.Craft Shanze Li Tian Xie School of Public and Environmental Affairs Indiana UniversityIndianaBloomingtonUSA University of Georgia Marine Institute DarienGeorgiaUSA State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijingChina Department of Water Ecology and Environment China Institute of Water Resources and Hydropower ResearchBeijingChina State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijingChina

Wetlands are known for their ability to trap sediment and eliminate pollutants from the surrounding ***,less is known regarding the differential role of headwater,mid-catchment,and coastal wetlands in filtering these *** accretion,organic carbon(C),total nitrogen(N),and total phosphorus(P)were measured in wetlands from the headwaters to the mouth of the Altamaha River,Georgia,USA to assess how sediment deposition,C sequestration,and N and P burial vary along the *** cores(n=2 per site)were collected from riparian,upper and lower alluvial,tidal freshwater forest and marsh,brackish marsh,and salt ***-centimeter depth increments were analyzed for^(137)Cs,to determine soil accretion,bulk density,and C,N,and P *** exhibited a bimodel distribution with the highest rates in riparian wetlands of the headwaters(3.9 mm/year)and in tidal fresh and brackish marshes(4.7–5.4 mm/year)of the *** rates were considerably lower in alluvial and tidal fresh forests and salt marshes(0.9–2.5 mm/year).Carbon sequestration and N burial followed a similar trend with the greatest accumulation in soils of tidal fresh and brackish marshes(102–150 g C/m^(2)/year,7.1–9.5 g N/m^(2)/year)that had not only high accretion but also high organic matter content(11%–12%C).Riparian soils with their low C content,high bulk density,and high P content had much greater sediment deposition(3310 g/m^(2)/year)and P burial(2.75 g P/m^(2)/year)than other wetlands along the waterway(180–1730 g sediment/m^(2)/year,0.23–0.90 g P/m^(2)/year).Results suggest that,in the Altamaha River,sediment deposition and P removal are maximized in the headwaters thereby protecting downstream freshwaters from the effects of P *** fresh and brackish marshes with their high rates of N burial can aid in protecting estuaries from N enrichment,many of which suffer from the effects of N *** from this study are scalable to other r

关键词： eutrophication organic matter soil accretion topography wetlands

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Influence of NO_(x) on the activity of Pd/θ-Al_(2)O_(3) catalyst for methane oxidation: Alleviation of transient deactivation

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Journal of Environmental Sciences 2022年第2期34卷 38-47页

作者： Chang Cui Yan Zhang 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 Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Pollutant Conversion Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Ningbo Research Center for Urban Environment Chinese Academy of SciencesNingbo 315800China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China

Alumina supported Pd catalyst(Pd/Al_(2)O_(3)) is active for complete oxidation of methane, while often suffers transient deactivation during the cold down process. Herein, heating and cooling cycle tests between 200 and 900 ℃ and isothermal experiments at 650 ℃ were conducted to investigate the influence of NO_(x) on transient deactivation of Pd/θ-Al_(2)O_(3) catalyst during the methane oxidation. It was found that the co-fed of NO alleviated transient deactivation in the cooling ramp from 800 to 500 ℃, which was resulted from the in situ formation of NO_(2) during the process of methane oxidation. Over the Pd/θ-Al_(2)O_(3), thermogravimetric analysis and O_(2) temperature programmed oxidation measurements confirmed that transient deactivation was due to the decomposition of Pd O particles and the hysteresis of Pd reoxidation, while the metal Pd entities were less active for methane oxidation than the Pd O ones. CO pulse chemisorption and scanning transmission electron microscopy characterizations rule out the NO_(2) effect on Pd size change. Powder X-ray diffraction and X-ray photoelectron spectroscopy characterizations were used to obtain palladium status of Pd/θ-Al_(2)O_(3) before and after reactions, indicating that in lean conditions at 650 ℃, the presence of NO_(2) increases the content of active Pd O on the catalyst surface, thus benefits methane oxidation. Homogeneous reaction between CH 4, O_(2), and NO_(x) may be partially responsible for the alleviation above 650 ℃. The interesting research of alleviation in transient deactivation by NO_(x), the components co-existing in exhausts, are of great significance for the application.

关键词： Methane Catalytic oxidation Palladium NO_(x)influence

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Establishment of soil moisture model based on hyperspectral data and growth parameters of winter wheat

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International Journal of Agricultural and Biological Engineering 2023年第3期16卷 160-168页

作者： Xizhi Lyu Weimin Xing Yuguo Han Zhigong Peng Baozhong Zhang Muhammad Roman Key Laboratory of State Forestry Administration on Soil and Water Conservation College of Soil and Water ConservationBeijing Forestry UniversityBeijing 100083China Yellow River Institute of Hydraulic Research Key Laboratory of the Loess Plateau Soil Erosion and Water Loss Process and Control of Ministry of Water ResourcesZhengzhou 450003China College of Hydraulic Science and Engineering Yangzhou UniversityYangzhou 225009China Forest Ecosystem Studies National Observation and Research StationJixianShanxi 042200China Key Laboratory of Non-point Source Pollution Control Ministry of Agriculture and Rural AffairsBeijing 100081China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100038China National Center of Efficient Irrigation Engineering and Technology Research-Beijing Beijing 100048China

Large area of soil moisture status diagnosis based on plant canopy spectral data remains one of the hot spots of agricultural ***,the existing soil water prediction model constructed by the spectral parameters without considering the plant growth process will inevitably increase the prediction *** study carried out research on the correlations among spectral parameters of the canopy of winter wheat,crop growth process,and soil water content,and finally constructed the soil water content prediction model with the growth days *** results showed that the plant water content of winter wheat tended to decrease during the whole growth *** plant water content had the best correlations with the soil water content of the 0-50 cm soil *** different growth stages,even if the soil water content was the same,the plant water content and characteristic spectral reflectance were also ***,the crop growing days parameter was added to the model established by the relationships between characteristic spectral parameters and soil water content to increase the prediction *** is found that the determination coefficient(R^(2))of the models built during the whole growth period was greatly increased,ranging from 0.54 to ***,the model built by OSAVI(Optimized Soil Adjusted Vegetation Index)and Rg/Rr,two of the highest precision characteristic spectral parameters,were selected for model *** correlation between OSAVI and soil water content,Rg/Rr,and soil water content were still significant(p<0.05).The R^(2),MAE,and RMSE validation models were 0.53 and 0.58,3.19 and 2.97,4.76 and 4.41,respectively,which was accurate enough to be applied in a large-area ***,the upper and lower irrigation limit of OSAVI and Rg/Rr were put *** research results could guide the agricultural production of winter wheat in northern China.

关键词： winter wheat canopy spectra growth process soil water content irrigation threshold soil moisture model prediction

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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.

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