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Distribution characteristics and removal rate of antibiotics and antibiotic resistance genes in different treatment processes of two drinking water plants

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Frontiers of environmental Science & Engineering 2024年第9期18卷 143-152页

作者： Jun Wang Mingtao Huang Bolin Li Hassan Ibrahim Mohamed Huanjie Song Gezi Li Ying Yu Han Zhang Weimin Xie School of Resource and environmental Engineering Wuhan University of TechnologyWuhan 430070China Wuhan Lingang Economic and Technological Development Zone Service Industry Development Investment Group Co.Ltd. Wuhan 430040China Civil Engineering Department Faculty of EngineeringAssiut UniversityAssiut 71516Egypt changjiang basin ecology environment and monitoring and scientific research center Changjiang Basin Ecology and Environment AdministrationMinistry of Ecological EnvironmentWuhan 430010China

Emerging pollutants,such as antibiotics and antibiotic-resistance genes,are becoming increasingly important sources of safety and health *** water safety,which is closely related to human health,should receive more attention than natural water body ***,minimal research has been performed on the efficacy of existing treatment processes in water treatment plants for the removal of antibiotics and antibiotic resistance *** address this research gap,this study detected and analyzed six main antibiotics and nine antibiotic resistance genes in the treatment processes of two drinking water plants in *** were collected over three months and then detected and analyzed using ultra-high-performance liquid chromatography-tandem mass spectrometry and fluorescence *** total concentrations of antibiotics and antibiotic resistance genes in the influent water of the two water plants were characterized as December>March>*** precipitation and filtration processes of the Zou Maling Water Plant and Yu Shidun Water Plant successfully removed the *** ozone-activated carbon process increased the removal rate of most antibiotics to 100%.However,a large amount of antibiotic resistance gene residues remained in the effluents of the two water *** experiments demonstrated that the existing ozone-activated carbon processes could not effectively remove antibiotic resistance *** study provides a reference for the optimization of drinking water treatment processes for antibiotics and antibiotic resistance gene removal.

关键词： Antibiotics Antibiotics resistance genes Water treatment process unit Spatiotemporal distribution Removal efficacy

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Nitrogen accumulation in a big lake affected by groundwater discharge in Central Yangtze River basin

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Journal of Earth Science 2024年

作者： Liansong Tang Rui Ma Lin Jingjing Ying Liang Xue Jiang Hubei Key Laboratory of Yangtze River basin environmental Aquatic Science， School of environmental Studies and State Key Laboratory of Biogeology and environmental Geology， China University of Geosciences changjiang basin ecology and environment monitoring and scientific research center，changjiang basin ecology and environment Administration， Ministry of ecology and environment

Nitrogen pollution is a major cause of lake eutrophication， garnering global concern for its detrimental impact on lake-water quality. However， the intricate interplay between lakes and groundwater in the accumulation and release of nitrogen remains largely overlooked. Using Honghu Lake as a case study， a large lake in the Yangtze River basin long plagued by nitrogen pollution， this study analyzed the temporal shifts in its water area from 1990 to 2021 using remote-sensing image classification algorithms. From 1990 to 2005， the natural water area of Hong Lake decreased by 72%. The transformation of much of this area into aquaculture zones and agricultural lands has led to a substantial influx of pollutants， culminating in the degradation of the water quality. Despite efforts to restore the natura water area post ban on aquaculture activities， the water quality of the lake remains compromised， indicating other pollution sources menacing the ecosystem of the lake. Field investigations conducted in 2011 and 2019 unveiled substantially higher concentrations of NH4-N and NO3-N in groundwater compared to lake water， with a discernible upward trajectory in pollutant levels over time. The18O mass-balance model was employed to assess groundwater flow dynamics， revealing an estimated lacustrine groundwater discharge of 0.71×106m3/d， underscoring the substantial annual influx of pollutants into the lake via groundwater pathways. Through a comprehensive analysis of surface water and groundwater quality trends within the study area， this research provides novel evidence implicating groundwater as a formidable contributor to the persistent nitrogen pollution afflicting Honghu Lake.

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Lake regime shift from submerged macrophyte to phytoplankton affected phosphorus speciation in sediment and eutrophic state in Caohai Lake,Guizhou,China

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Journal of Oceanology and Limnology 2023年第6期41卷 2262-2275页

作者： Jixing DONG Yanmin GUO Pinhua XIA Yuanbin TIAN Feifei ZHENG Anyan LI Tao LIN Ruiwen LI Guizhou Province Key Laboratory for Information System of Mountainous Areas and Protection of Ecological environment Guizhou Normal UniversityGuiyang 550001China Yangtze River basin Ecological environment monitoring and scientific research center Yangtze River Basin Ecological Environment Supervision and Administration BureauMinistry of Ecological EnvironmentWuhan 430010China

To understand the effect of regime shift in Caohai Lake in Yunnan-Guizhou Plateau,SW China from submerged macrophyte dominance to phytoplankton dominance on the specification and distribution of phosphorus and on ecological and environmental states,changes in phosphorus specification in the sediments and water were *** form,composition,and distribution of phosphorus in sediment were sampled in July 2020(before regime shift)and July 2021(after regime shift)were *** reveal that phosphorus content in sediment was lower than that those of Erhai Lake and Dianchi Lake,Yunnan,SW China,on the same plateau,and was lower than those of Taihu Lake,Chaohu Lake,and Poyang Lake in the middle-lower changjiang(Yangtze)River *** phosphorus(Or-P)was the main form(up to 60%),followed by inactive phosphorus(Ina-P),and the active phosphorus(Act-P),the least,which is opposite to those of Taihu Lake and Poyang Lake in the middle-lower changjiang River Plain in the eastern ***-P content was high,indicating a high potential risk of phosphorous *** the regime shift,the total phosphorus in sediment decreased from 0.87±0.13 to 0.70±0.13 g/*** proportion of Or-P and Act-P decreased from 68.23% to 65.32% and from 5.35% to 4.69%,*** contrast,the proportion of Ina-P increased from 26.42% to 29.99%.The Moran’s I index revealed that the heterogeneity of the spatial distributions of the total phosphorus(S-TP)and Act-P in the sediments before regime shift was significant(P0.05).The regime shift aggravated the eutrophication of the lake,the trophic level index(TLI)increased from 48.42 to 54.49(P<0.01),and the previously mesotrophic lake became a mildly eutrophic *** results of this study revealed the impact of regime shift in the lake from submerged macrophyte dominance to phytoplankton dominanc

关键词： Caohai Lake sediment phosphorus specification regime shift

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Effects of herbicide butachlor application on the growth of periphytic biofilms and nitrogen loss in paddy systems

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Pedosphere 2024年第1期34卷 211-221页

作者： Yanhui ZHAO Mingjun LEI Liandong JING Fan XIA Meixia YAN Jiantong LIU Yonghong WU Yunli WU Chenxi WU ecology and environment monitoring and scientific research center Yangtze Basin Ecology and Environment AdministrationMinistry of Ecological and EnvironmentWuhan 430010China College of Chemistry and environmental Protection Engineering Southwest Minzu UniversityChengdu 610041China State Key Laboratory of Freshwater ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan 430072China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil SciencesChinese Academy of SciencesNanjing 210008China

The application of butachlor as an herbicide in paddy fields is widely practiced,aiming to increase rice yield by directly or indirectly influencing the paddy *** biofilms,which form at the soil-water interface in paddy fields,are complex bioaggregates that play an important role in nitrogen (N) *** objective of this study was to investigate the effect of butachlor on periphytic biofilm growth and N cycling under both light and dark conditions in the *** results revealed that butachlor application hindered the growth of periphytic biofilms and led to the dominance of Cyanobacteria as the primary prokaryotes,while inhibiting the development of eukaryotic ***,the application of butachlor reduced the richness and diversity of prokaryotes,but increased those of eukaryotes in periphytic *** light treatments exhibited higher total N loss because light favored periphytic biofilm growth and enhanced ammonium (NH_(4)^(+)) assimilation and ***,butachlor application resulted in the increased retention of NH_(4)^(+)-N and nitrate (NO_(3)^(-))-N and an increase in N loss via *** abundances of functional genes encoding enzymes such as ammonia monooxygenase,nitrite reductase,and nitrous oxide reductase were increased by butachlor application,favoring nitrification and denitrification ***,the results suggest that butachlor application leads to an increase in total N loss mainly through denitrification in paddy systems,particularly in the presence of periphytic ***,the results may provide valuable insights into the changes in periphytic biofilm growth and N cycling induced by butachlor,and future studies can further explore the potential implications of these changes in paddy soils.

关键词： ammonia-oxidizing bacteria amoA denitrification denitrifying bacteria nirK nitrification nitrogen cycling nosZ volatilization

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The impacts of ambiguity in preparation of 80% sulfuric acid solution and shaking time control of calibration solution on the determination of transparent exopolymer particles

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Acta Oceanologica Sinica 2023年第4期42卷 50-58页

作者： Congcong Guo Guicheng Zhang Shan Jian Wei Ma Jun Sun Institute of Marine Science and Technology Shandong UniversityQingdao 266237China Institute for Advanced Marine research China University of GeosciencesGuangzhou 511462China research Centre for Indian Ocean Ecosystem Tianjin University of Science and TechnologyTianjin 300457China Huaihe River basin Eco-environment monitoring and scientific research center Huaihe River Basin Eco-environment Supervision and Administration BureauBengbu 233001China

The quantification of transparent exopolymer particles(TEP) by colorimetric method is of large error and low repeatability,one major reason of which is related to the absence of clear definition and evaluation for part steps of the original *** is obscure that the 80% sulfuric acid solution,acted as the extraction solution in the determination of TEP,is prepared based on a volume ratio or mass ***,the change of solubility of recently available Gum Xanthan(GX) from the market means that the original protocol is no longer applicable,and the grinding of GX stock solution with a tissue grinder is replaced by shaking with a rotating shaker in the study to prevent the excessive dissolution of *** found that different preparation techniques could result in the varied concentrations of 80% H_(2)SO_(4).The duration of shaking during the preparation of standard solution significantly affected the slope of the calibration curve,which caused different correction results of *** impacts of different extraction solution concentrations and shaking time of GX solution on the quantification of TEP were investigated based on the field sampling and laboratory *** extraction capacities of H_(2)SO_(4) with different concentrations for Alcian Blue were distinct,but had limited effect on the final measuring result of *** change of the standard curve slope came along with the variation of shaking time,which markedly altered the detection limit and calibration result,and the extended shaking time was in favor of the determination of low-concentration *** was suggested that the extraction solution concentration,shaking time and filtration volume of standard solution are required to be well controlled and selected to obtain more accurate results for TEP with different concentrations.

关键词： transparent exopolymer particles determination method method improvement sulfuric acid shaking time

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Baseflow variations and its causes in a subtropical watershed of southern China

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Journal of Mountain Science 2022年第10期19卷 2817-2829页

作者： LIU Zheng SHENG Fei LIU Shi-yu WANG Yan-yan ZHOU Chang-ming GU Chao-jun School of Land Resources and environment Jiangxi Agricultural UniversityNanchang 330045China Key Laboratory of Poyang Lake Watershed Agricultural Resources and ecology of Jiangxi Province Nanchang 330045China College of Resources and environment Huazhong Agricultural UniversityWuhan 430070China Yangtze River basin monitoring center Station for Soil and Water Conservation Changjiang Water Resources CommissionWuhan 430012China

Baseflow is an essential component of streamflow and plays a crucial role in maintaining the stability of ***,few quantitative studies have identified the effects of leading factors on baseflow variation at the small watershed scale,especially in subtropical *** this study,the small watershed(Pengchongjian watershed,2.90 km2),located in Southern China,was considered to explore the quantitative impact of precipitation,evapotranspiration,temperature,and vegetation restoration on *** digital filter method was used to separate baseflow by daily streamflow records from 1983 to *** stepwise regression models were developed for selecting significant influencing factors of baseflow at seasonal and annual *** direct and indirect effects,as well as their quantitative relationships between baseflow and multiple factors,were clarified by the path *** results showed that filtered average annual baseflow significantly decreased(pscientific basis for managing water resources in the watershed.

关键词： Baseflow separation Baseflow index Climate change Groundwater Pengchongjian watershed

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Spatiotemporal variation of microeukaryotic biodiversity and biotic condition associated with disinfectants after the COVID-19 lockdown in Wuhan,China

Water Biology and Security

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Water Biology and Security 2024年第3期3卷 9-18页

作者： Fan Li Ruiwen Li Yongyong Guo Yindan Zhang Xiangping Chen Fayu Tan Yanxia Zuo Jie Xiong Lihua Yang Jian Han Bingsheng Zhou Lizhong Zhu State Key Laboratory of Freshwater ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan430072PR China ecology and environment monitoring and scientific research center Ecology and Environment Administration of Yangtze River BasinMinistry of Ecology and EnvironmentWuhan430010PR China University of Chinese Academy of Sciences Beijing100039PR China Wuhan Ecological and environmental monitoring center Department of Ecology and Environment of Hubei ProvinceWuhan430015PR China Department of environmental Science Zhejiang UniversityHangzhou310058PR China Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control Hangzhou310058PR China

Intensive application of chlorine-based disinfectants driven by the COVID-19 pandemic was suspected to be detrimental to receiving water ecosystems,but with little field *** characterized the occurrences of typical disinfectants and microeukaryotic communities in surface waters associated with three wastewater treatment plants(WWTP)-river systems one year after the lockdown in Wuhan,***(THMs)declined from summer 2020(0.01–1.82μg/L)to summer 2021(0.01–0.95μg/L),whereas quaternary ammonium salts(QAs)increased from summer 2020(0.53–6.35 ng/L)to summer 2021(8.49–191 ng/L).Biodiversity monitoring with environmental DNA(eDNA)revealed significant temporal variation in microeukaryotic community *** monitored disinfectants were correlated with some eukaryotic communities as demonstrated by redundancy *** example,QAs were positively related to Cryptophyta relative abundance,but negatively related to Rotifera relative abundance.A microeukaryote-based multimetric index indicated ecological impairment near the Han River WWTP outlet in *** findings indicate the influence of heavily used disinfectants on river microeukaryotic communities,and the usefulness of assessing mid-term ecological risks from disinfectants in the post COVID-19 era.

关键词： Disinfectants Biodiversity Biotic condition Wastewater treatment plants-rivers COVID-19 pandemic

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Extracting subpixel vegetation NDVI time series for evaluating the mixed pixel effect on GPP estimation in urban areas

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International Journal of Digital Earth 2023年第1期16卷 3222-3238页

作者： Shuxu Li Zheng Zhou Rongfei Ma Shishi Liu Qingfeng Guan School of Resources and environment Huazhong Agricultural UniversityWuhanHubeiPeople’s Republic of China Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River) Ministry of AgricultureWuhanPeople’s Republic of China Yangtze River basin Ecological environment monitoring and scientific research center Yangtze River Basin Ecological Environment Supervision and Administration BureauMinistry of Ecology and EnvironmentWuhanHubeiPeople’s Republic of China School of Geography and Information Engineering China University of Geosciences(Wuhan)WuhanHubeiPeople’s Republic of China National Engineering research center of GIS China University of Geosciences(Wuhan)WuhanHubeiPeople’s Republic of China

The normalized difference vegetation index(NDVI)is the most widely used vegetation index for monitoring vegetation vigor and *** NDVI time series are usually derived at coarse or medium spatial resolutions,pixel size often represents a mixture of vegetated and non-vegetated *** heterogeneous urban areas,mixed pixels impede the accurate estimation of gross primary productivity(GPP).To address the mixed pixel effect on'NDVI time series and GPP estimation,we proposed a framework to extract subpixel vegetation NDVI(NDVI_(vege))from Landsat OLI images in urban areas,using endmember fractions,mixed NDVI(NDVI_(mix)),and *** non-vegetation,*** demonstrated that the NDVI_(vege) extracted by this framework agreed well with the true NDVI_(vege) cross seasons and vegetation fractions,with R^(2) ranging from 0.74 to 0.82 and RMSE ranging from 0.03 to *** NDVI_(vege) time series was applied to evaluate vegetation GP in Wuhan,*** total annual GPp estimated with NDVI_(vege) was 28-35%higher than the total annual GPP estimated with NDVI_(mix) implying uncertainty in the GPP estimations caused by mixed *** study showed the potential of the proposed framework to resolve NDVI_(vege) for characterizing vegetation dynamics in heterogeneous areas.

关键词： Normalized difference vegetation index(NDVI) mixture analysis urban vegetation gross primary production(GPP)

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Quantifying glacier surging and associated lake dynamics in Amu Darya river basin using UAV and remote sensing data

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Journal of Mountain Science 2024年第9期21卷 2967-2985页

作者： SAFAROV Mustafo KANG Shichang MURODOV Murodkhudzha BANERJEE Abhishek NAVRUZSHOEV Hofiz GULAYOZOV Majid FAZYLOV Ali VOSIDOV Firdavs Key Laboratory of Cryospheric Science and Frozen Soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China research center for ecology and environment of Central Asia(Dushanbe) Dushanbe 734063Tajikistan University of Chinese Academy of Sciences Beijing 100049China Xinjiang Institute of ecology and Geography Chinese Academy of SciencesUrumqi 830011China Mountain Societies research Institute University of Central AsiaDushanbe 734000Tajikistan State scientific Institution“center for research of Glaciers of the National Academy of Sciences of Tajikistan” Dushanbe 734025Tajikistan Institute of Water Problems Hydropower and Ecology of the National Academy of Sciences of TajikistanDushanbe 734025Tajikistan

Glaciers in the Pamir region are experiencing rapid melting and receding due to climate change,which has a significant implication for the Amu Darya river ***,surging glaciers,which undergo unpredictable advances,are potentially leading to the obstruction of high-altitude river channels and also glacial lake outburst *** of-703.5±30.0 *** is a substantial increase in the number(from 19 to 75)and area(from 4889.7±0.6 m2 to 15345.5±0.6 m2)of RGS lakes along with supra-glacier ponds based on a comparison of ArcGIS base map in 2011 and high-resolution UAV data in *** M glacier,number of lakes increased from 4 to 22 but the lake area declined from 10715.2±0.6 to 365.6±0.6 *** was noted that the largest lake in 2011 with an area of 10406.4±0.6 m2 at the southeastern portion of the glacier was not observed in 2023 due to *** the glaciers have substantially impacted the river flow(Abdukahor river)by obstructing a significant proportion of river channel in recent years and might cause outburst *** findings enhance the understanding of glacier dynamics and their impacts on the surrounding areas,emphasizing the urgent need for continued monitoring and appropriate management strategies,with a specific focus on surging glaciers and the associated risks.

关键词： UAV Remote sensing Climate change Glacier dynamics Google Earth Engine Pamir

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Submarine groundwater discharge and seasonal hypoxia off the changjiang River Estuary

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Acta Oceanologica Sinica 2023年第8期42卷 125-133页

作者： Tianyi Zhu Bochao Xu Xiaoyi Guo Qinsheng Wei Ergang Lian Pengxia Liu William C.Burnett Qingzhen Yao Zhigang Yu Frontiers Science center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education Ocean University of ChinaQingdao 266100China Laboratory for Marine ecology and environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China College of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China Academy of the Future Ocean Ocean University of ChinaQingdao 266100China Key Laboratory of Marine Eco-environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266100China research center for monitoring and environmental Sciences Taihu Basin and East China Sea Ecological Environment Supervision and Administration AuthorityMinistry of Ecology and EnvironmentShanghai 200120China State Key Laboratory of Marine Geology Tongji UniversityShanghai 200092China Department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee FL 32306USA

Hypoxia is a common phenomenon in the sea adjacent to the changjiang River Estuary(CJE),one of the global major *** groundwater discharge(SGD)is a widely recognized pathway for terrestrial materials entering the sea,and has been found to be significant off the *** used a^(222)Rn mass balance model to estimate the SGD fluxes off the CJE and showed that it is linked to seasonal dissolved oxygen(DO)*** SGD fluxes were estimated to be(0.012±0.010)m^(3)/(m^(2)·d)in winter,(0.034±0.015)m^(3)/(m^(2)·d)in summer,and(0.020±0.010)m^(3)/(m^(2)·d)in *** found a significant negative correlation between DO concentrations and SGD rates with groundwater discharge being highest in the summer flood *** addition,distribution patterns of SGD and hypoxia zones in summer are spatially overlapped,indicating that SGD is an important contributor to summer hypoxia in this region.

关键词： submarine groundwater discharge ^(222)Rn hypoxia ^(226)Ra

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