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Development of a coupled model to simulate and assess arsenic contamination and impact factors in the Jinsha River Basin,China

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Journal of Environmental Sciences 2025年第1期147卷 50-61页

作者： Yidian Sun Xu Zhang Hong Peng Wenting Zhou Anna Jiang Feng Zhou Hao Wang Wanshun Zhang School of Resource and Environmental Sciences Wuhan UniversityWuhan 430079China School of water Conservancy and Hydropower Engineering Wuhan UniversityWuhan 430072China China institute of water Resources and Hydropower research Beijing 100038China School of water Resources and Hydropower State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhan 430072China

With the increasing severity of arsenic(As)pollution,quantifying the environmental behavior of pollutant based on numerical model has become an important approach to determine the potential impacts and finalize the precise control *** the industrialintensive Jinsha River Basin as typical area,a two-dimensional hydrodynamic water quality model coupled with Soil andwater Assessment Tool(SWAT)model was developed to accurately simulate the watershed-scale distribution and transport of As in the terrestrial and aquatic environment at high spatial and temporal *** effects of hydro-climate change,hydropower station construction and non-point source emissions on Aswere quantified based on the coupled *** result indicated that higher As concentration areas mainly centralized in urban districts and concentration slowly decreased from upstream to *** to the enhanced rainfall,the As concentration was significantly higher during the rainy season than the dry ***-climate change and the construction of hydropower station not only affected the dissolved As concentration,but also affected the adsorption and desorption of As in ***,As concentration increased with the input of non-point source pollution,with the maximum increase about 30%,resulting that non-point sources contributed important pollutant impacts to *** coupled model used in pollutant behavior analysis is generalwith high potential application to predict and mitigate water pollution.

关键词： watershed system Arsenic Modeling Distribution Hydro-climate change Non-point source pollution

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Ozonolysis of ketoprofen in polluted water:Reaction pathways,kinetics,removal efficiency,and health effects

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Journal of Environmental Sciences 2025年第1期147卷 451-461页

作者： Qiong Mei Zhaoxu Qiu Jinchan Jiang Mingxue Li Qizhao Wang Maoxia He School of Land Engineering Shaanxi Key Laboratory of Land ConsolidationChang’an UniversityXi’an 710064China School of water and Environment Chang’an UniversityXi’an 710054China Environment research institute Shandong UniversityQingdao 266237China Weihai water Conservancy Service Center Weihai 264200China

Ketoprofen(KET),as a non-steroidal anti-inflammatory drug frequently detected in aqueous environments,is a threat to human health due to its accumulation and low biodegradability,which requires the transformation and degradation of KET in aqueous *** this paper,the reaction process of ozone-initiated KET degradation in water was investigated using density functional theory(DFT)method at the M06-2X/6-311++g(3df,2p)//M06-2X/6-31+g(d,p)*** detailed reaction path of KET ozonation is *** thermodynamic results show that ozone-initiated KET degradation is *** ultraviolet irradiation,the reaction of ozone with water can also produce OH radicals(HO·)that can react with *** degradation reaction of KET caused by HO·was further *** kinetic calculation illustrates that the reaction rate(1.99×10-1(mol/L)^(-1)sec^(-1))of KET ozonation is relatively slow,but the reaction rate of HO·reaction is relatively high,which can further improve the degradation *** this basis,the effects of pollutant concentration,ozone concentration,natural organic matter,and pH value on degradation efficiency under UV/O3 process were *** ozonolysis reaction of KET is not sensitive to pH and is basically ***,the toxicity prediction of oxidation compounds produced by degradation reaction indicates that most of the degradation products are harmless,and a few products containing benzene rings are still toxic and have to be *** study serves as a theoretical basis for analyzing the migration and transformation process of anti-inflammatory compounds in the water environment.

关键词： Ozonolysis,Ketoprofen Degradation mechanisms OH radicals Aquatic toxicity Degradation efficiency

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Enhancing microbial superoxide generation and conversion to hydroxyl radicals for enhanced bioremediation using iron-binding ligands

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Journal of Environmental Sciences 2025年第1期147卷 597-606页

作者： Yuhan Wang Xue Ning Jinsong Liang Aijie Wang Jiuhui Qu School of Civil and Environmental Engineering Harbin Institute of TechnologyShenzhen 518055China SFI MaREI Centre for Energy Climate and MarineEnvironmental Research InstituteUniversity College CorkCorkIreland Center for water and Ecology Tsinghua UniversityBeijing 100084China

Harnessing bacteria for superoxide production in bioremediation holds immense promise,yet its practical application is hindered by slow production rates and the relatively weak redox potential of *** study delves into a cost-effective approach to amplify superoxide production using an Arthrobacter strain,a prevalent soil bacterial *** research reveals that introducing a carbon source along with specific iron-binding ligands,including deferoxamine(DFO),diethylenetriamine pentaacetate(DTPA),citrate,and oxalate,robustly augments microbial superoxide ***,our findings suggest that these iron-binding ligands play a pivotal role in converting superoxide into hydroxyl radicals by modulating the electron transfer rate between Fe(Ⅲ)/Fe(Ⅱ)and ***,among the tested ligands,only DTPA emerges as a potent promoter of this conversion process when complexed with Fe(Ⅲ).We identify an optimal Fe(Ⅲ)to DTPA ratio of approximately 1:1 for enhancing hydroxyl radical production within the Arthrobacter *** research underscores the efficacy of simultaneously introducing carbon sources and DTPA in facilitating superoxide production and its subsequent conversion to hydroxyl radicals,significantly elevating bioremediation ***,our study reveals that DTPA augments superoxide production in cultures of diverse soils,with various soil microorganisms beyond Arthrobacter identified as contributors to superoxide *** emphasizes the universal applicability of DTPA across multiple bacterial *** conclusion,our study introduces a promising methodology for enhancing microbial superoxide production and its conversion into hydroxyl *** findings hold substantial implications for the deployment of microbial reactive oxygen species in bioremediation,offering innovative solutions for addressing environmental contamination challenges.

关键词： Superoxide Hydroxyl radical Iron-binding ligand Bioremediation DTPA

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Evaluating the impacts of converting grain to vegetable fields on nitrate transport in the deep vadose zone of the North China Plain

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Journal of Geographical Sciences 2025年第1期35卷 189-205页

作者： LIU Meiying MIN Leilei WU Lin ZHANG Yucui QI Yongqing WANG Shiqin LIU Binbin GENG Di SHEN Yanjun Hebei Key Laboratory of water-Saving Agriculture Key Laboratory of Agricultural Water ResourcesCenter for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyCASShijiazhuang050022China School of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing101408China

Nitrate(NO_(3)^(-))accumulation and transport processes in the thick vadose zone affect the evolution of the groundwater NO_(3)^(-)content in intensive agricultural *** land-use change(ALUC),typically accompanied by substantial alterations in nitrogen fertilizer application and irrigation practices,is an important influencing *** study evaluated the changes in NO_(3)^(-)accumulation and transport in the deep vadose zone(DVZ,below the root zone),and the groundwater NO_(3)^(-)content associated with ALUC from grain to vegetable fields in the North China Plain(NCP).The ALUC from grain to vegetable resulted in nitrate–nitrogen(NO_(3)^(-)-N)accumulation in DVZ increased by 235.5 kg ha^(-1)m^(-1)(163.2%)in the piedmont plain and 224.9 kg ha^(-1)m^(-1)(102.7%)in the central plain,*** change accelerated downward transport velocity in the DVZ(from 0.81±0.47 to 0.89±0.55 m yr^(-1)in the piedmont plain,and from 0.24±0.12 to 0.92±0.12 m yr^(-1)in the central plain)and increased NO_(3)^(-)leaching *** transport velocity and leaching fluxes resulted in chemical N-fertilizer entering the aquifer in several areas in the piedmont *** impact of the agricultural activity intensity changes,accompanied by the ALUC,on groundwater quantity and quality should be considered in similar regions.

关键词： grain field vegetable field nitrate groundwater deep vadose zone(DVZ)

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Advances in regional-scale crop growth and associated process modeling

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Science China Earth Sciences 2025年第3期68卷 653-668页

作者： Wenfeng LIU Yawei BAI Taisheng DU Mengxue LI Hong YANG Shichao CHEN Chuanbin LIANG Shaozhong KANG State Key Laboratory of Efficient Utilization of Agricultural water Resources China Agricultural University National Field Scientific Observation and research Station on Efficient water Use of Oasis Agriculture in Wuwei of Gansu Province Center for Agricultural water research in China China Agricultural University 2w2e Environmental Consulting GmbH

In the context of global change, ensuring national food security and achieving sustainable development of agricultural production systems have become major challenges worldwide. To address these issues, regional-scale crop growth and associated process(CROP-AP) models, with their robust simulation and predictive capabilities, have emerged as important tools for studying a wide range of issues relating to agricultural production at river basin, national, and even global scales. Here, we provide a systematic review of the advances of regional-scale CROP-AP models. First, regional-scale CROP-AP models are categorized based on model characteristics: statistical models, crop growth models, hydrology-crop coupling models, and ecosystem models. The origin, development, principle, structure, and application of each model type are introduced. Then, the main functions of regional-scale CROP-AP models are critically reviewed from five aspects: crop yield prediction, crop water consumption, agricultural non-point source pollution, greenhouse gas emissions, and climate change impact and ***, the future development trends and research priorities of regional-scale CROP-AP models are explored from six key perspectives: model validation and calibration, the ability to simulate the coupling of crop physiology and human activities,enhancing model scalability, multi-model ensembles, data and code sharing, and the integration of artificial intelligence. This review aims to provide comprehensive references and insights for the further development and application of large-scale, high-precision CROP-AP models.

关键词： Regional scale Crop model Biophysical processes Model functions Global change

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Quercus acutissima exhibits more adaptable water uptake patterns in response to seasonal changes compared to Pinus massoniana

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Forest Ecosystems 2025年第1期12卷 29-37页

作者： Suimeng Zhang Xiaodi Wang Zhaowang Huang YiTao Bao Jiang Jiang Ziqiang Liu Yinshanbeilu Grassland Eco-hydrology National Observation and research Station China Institute of Water Resources and Hydropower ResearchBeijing100038China Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037China

Background:Seasonal precipitation variability significantly affects water use in forests;however,whether water uptake is adapted to changes in precipitation,particularly whether it could affect the coexistence of tree species,has rarely been quantified in forest ***:In this study,dual stable isotopes and the Li-6400 portable photosynthesis system were used to determine the water sources of a mixed conifer(Pinus massoniana)and broadleaf(Quercus acutissima)forest and changes in hydraulic characteristics during the dry and wet seasons in a southern hilly region of ***:Although the hydraulic characteristics of *** were lower than those of ***,it maintained a stable water source from the deep soil layer and a higher stomatal conductance(Gs),leading to a higher transpiration rate(Tr)during the growing *** mainly absorbed water from deeper soil layers in the dry season and took up from shallow soil layers in the wet *** Gs values exhibited sensitivity to precipitation,while it maintained a lower Tr value during the growing *** excessive water-use strategy observed in *** may confer weak drought-tolerance during higher frequency and more intense extreme precipitation events,whereas *** may exhibit better ecological adaption to precipitation ***:The overlap of water niches in mixed forests did not appear to affect the coexistence of tree *** present study provides insights into reforestation and water management in the southern hilly regions of China.

关键词： water use Transpiration Stable isotope Hydraulic characteristics

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Chemical weathering in Manas River Basin:Driven by sulfuric acid or carbonic acid?

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Acta Geochimica 2025年第1期44卷 59-85页

作者： Jiaxin Zhang Bingqi Zhu Key Laboratory of water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina

Carbonic acid produced by the dissolution of atmospheric and soil CO_(2)in water is usually the most dominant catalyst for chemical weathering,but a sulfuric aciddriven phenomenon,different from usual,was found in the orogenic belt watersheds dominated by silicate *** study,rooted in comprehensive field investigations in the Manas River Basin(MRB)north of the Tianshan Mountains,delves into the mechanisms and impacts of sulfuric and carbonic acid as catalysts driving diff erent types of chemical weathering in the Central Asian Orogenic *** analyses elucidate that carbonate weathering constitutes 52.4%of the total chemical weathering,while silicate and evaporite account for 18.6%and 25.3%,respectively,with anthropogenic activities and atmospheric precipitation having little eff *** estimated total chemical weathering rate in MRB is approximately 0.075×10^(6)mol/km^(2)/*** findings further suggest that,preceding carbonate precipitation(<10^(4)year),chemical weathering can absorb CO_(2).Subsequently,and following carbonate precipitation(10^(4)-10^(7)year),it will release CO_(2).The release significantly surpasses the global average CO_(2)consumption,contributing to a noteworthy climate *** study underscores the distinctive weathering mechanisms,wherein sulfuric acid emerges as the predominant *** quantity of sulfuric acid as a catalyst is approximately three times that of carbonic *** acid-driven carbonate rock weathering(SCW)is identified as the sole chemical weathering type with a net CO_(2)release eff *** CO_(2)release flux(5176 mol/km^(2)/year)is roughly 2.5 times the CO_(2)absorption by Ca-Mg silicate weathering,highlighting the pivotal role of chemical weathering in sourcing atmospheric CO_(2)over the timescales of carbonate precipitation and sulfate ***,this study posits that catalyst and transport limitations are the most plausible critical factors in *** interplay between s

关键词： Catchment chemical weathering Mid-latitude orogenic belt Sulﬁde oxidation Manas River Basin

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Improving irrigation management in wheat farms through the combined use of the AquaCrop and WinSRFR models

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Journal of Arid Land 2025年第2期17卷 245-258页

作者： Arash TAFTEH Mohammad R EMDAD Azadeh SEDAGHAT Department of Irrigation and Soil Physics Soil and Water Research InstituteAgricultural Research Education and Extension Organization(AREEO)Karaj 31587-77871Iran

water is essential for agricultural production;however,climate change has exacerbated drought and water stress in arid and semi-arid areas such as *** these challenges,irrigation water efficiency remains low,and current water management schemes are ***,Iranian crops suffer from low water productivity,highlighting the urgent need for enhanced productivity and improved water management *** this study,we investigated irrigation management conditions in the Hamidiyeh farm,Khuzestan Province,Iran and used the calibrated AquaCrop and WinSRFR(a surface irrigation simulation model)models to reflect these ***,we examined different management scenarios using each model and evaluated the results from the second *** findings demonstrated that combining simulation of the AquaCrop and WinSRFR models was highly effective and could be employed for irrigation management in the *** AquaCrop model accurately simulated wheat yield in the first year,being 2.6 t/hm^(2),which closely aligned with the measured yield of 3.0 t/hm^(2).Additionally,using the WinSRFR model to adjust the length of existing borders from 200 to 180 m resulted in a 45.0%increase in efficiency during the second *** enhance water use efficiency in the field,we recommended adopting borders with a length of 180 m,a width of 10 m,and a flow rate of 15 to 18 L/*** AquaCrop and WinSRFR models accurately predicted border irrigation conditions,achieving the highest water use efficiency at a flow rate of 18 L/*** these models increased farmers'average water consumption efficiency from 0.30 to 0.99 kg/m^(3)in the second ***,the results obtained from the AquaCrop and WinSRFR models are within a reasonable range and consistent with international *** adjustment is projected to improve the water use efficiency in the field by approximately 45.0%when utilizing the border irrigation ***,integrating these two

关键词： AquaCrop crop modeling WinSRFR water management water use efficiency

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Changes in River Cross-section Morphology and Response to Streamflow and Sediment Processes in Middle Reaches of Yellow River,China

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Chinese Geographical Science 2025年第1期35卷 161-174页

作者： WEN Yongfu LI Pengfei LI Mengzhen MA Chaohui GAO Peng MU Xingmin ZHAO Guangju The research Center of Soil and water Conservation and Ecological Environment Chinese Academy of Sciences and Ministry of EducationYangling 712100China institute of Soil and water Conservation Chinese Academy of Sciences&Ministry of Water ResourcesYangling 712100China University of Chinese Academy of Sciences Beijing 100049China Hebei University of water Resources and Electric Engineering Cangzhou 061001China Xi’an University of Science and Technology Xi’an 710054China institute of Soil and water Conservation Northwest A&F UniversityYangling 712100China

Changes in river cross-section morphology have decisive influences on the flood discharge and sand transport capacity of rivers;thus,these changes strongly reflect the vitality of a *** this paper,based on the river cross-section and water and sediment data of two different periods(1974−1987 and 2007−2021),the trend analysis,change-point analysis and sediment rating curve method were used to analyze the change process of river cross-section morphology and its response to streamflow and sediment changes in the main river stream of the Yellow River at the Longmen hydrological *** 1974 to 1987(except in 1977),the riverbed experi-enced siltation,and the riverbed elevation ***,from 2007 to 2021,the riverbed experienced scouring,and the riverbed el-evation gradually *** cross-section shape changed from rectangular to U-shaped(deeper on the right side)at the Longmen *** changes in streamflow and sediment processes significantly impacted the evolution of river ***-flow(Pwater depth and sediment load coefficients followed a power *** decreasing trend in sediment discharge was sig-nificantly stronger than that in *** sediment particles tended to become *** sediment rating curve indicates that the sediment supply from upstream decreased while the erosive power in the river channel increased,leading to a gradual decline in riverbed elevation at the Longmen cross-section from 2007 to *** findings help us better understand the impacts of ecological restoration on changes in river streamflow and sediment during river evolution.

关键词： cross-section shape riverbed elevation water depth streamflow sediment discharge eco-restoration Longmen station middle reaches of the Yellow River,China

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Enhancing the photocatalytic efficiency by the molecular modification effect derived from pollutant adsorption on highly crystalline BiOBr

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Journal of Environmental Sciences 2025年第2期148卷 263-273页

作者： Yang Jin Tongyin Liu Yanpeng Mao Fan Li Chun Hu National Engineering Laboratory for Reducing Emissions from Coal Combustion Engineering Research Center of Environmental Thermal Technology of Ministry of EducationShandong Key Laboratory of Energy Carbon Reduction and Resource UtilizationSchool of Energy and Power EngineeringShandong UniversityJinan 250061China Beijing Enterprises water GroupInvestment Limited Beijing 100102China institute of Environmental research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China Key Laboratory of Drinking water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China

The adsorption of pollutants can not only promote the direct surface reaction,but also modify the catalyst itself to improve its photoelectric characteristics,which is rarely studied for water treatment with inorganic photocatalyst.A highly crystalline BiOBr(c-BiOBr)was synthesized by a two-step preparation *** to the calcination,the highly crystalline enhanced the interface interaction between pollutant and *** complex of organic pollutant and[Bi_(2)O_(2)]^(2+)could promote the active electron transfer from the adsorbed pollutant to c-BiOBr for the direct pollutant degradation by holes(h^(+)).Moreover,the pollutant adsorption actually modified c-BiOBr and promoted more unpaired electrons,which would coupling with the photoexcitation to promote generate more O_(2)^(•-).The molecular modification effect derived from pollutant adsorption significantly improved the removal of *** work strongly deepens the understanding of the molecularmodification effect from the pollutant adsorption and develops a novel and efficient approach for water treatment.

关键词： Highly crystalline BiOBr Pollutant adsorption Molecular modification Photocatalysis water treatment

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