Antibiotics along an alpine river and in the receiving lake with a catchment dominated by grazing husbandry  

作　　者：Jianwei Dong Dandan Yan Kangle Mo Qiuwen Chen Jianyun Zhang Yuchen Chen Zhiyuan Wang 

机构地区：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Nanjing Hydraulic Research Institute,Nanjing 210029,China [2]Center for Eco-Environmental Research,Nanjing Hydraulic Research Institute,Nanjing 210029,China [3]Yangtze Institute for Conservation and Green Development,Nanjing 210029,China [4]School of Marine Science and Engineering,Nanjing Normal University,Nanjing 210023,China

出　　处：《Journal of Environmental Sciences》2022年第5期374-382,共9页环境科学学报（英文版）

基　　金：This work was supported by the National Key Research and Development Program of China(No.2017YFC0404501);the National Natural Science Foundation of China(No.51809177);China Postdoctoral Science Foundation(No.2018M630576);Special Fund for Basic Scientific Research of Central Public Research Institutes NHRI Youth fund(No.Y918017).

摘　　要：The livestock breeding industries face overuse of antibiotics,which has been intensively studied in recent years.However,the occurrence and fate of antibiotics as well as their potential threats to the aquatic environments in alpine and arid regions remain unclear.This study investigated the relationship of the occurrence and concentrations of antibi-otics between the Kaidu River and Bosten Lake in a typical alpine basin in China.Hot spots with antibiotic pollution source were explored.The antibiotic concentrations in river water and suspended sediment(SPS)were 2.20-99.4 ng/L and 1.03-176 ng/g.The dominant antibi-otics were tetracyclines,sulphacetamide,and ofloxacin in river water and sulfonamides,clarithromycin,roxithromycin,and ofloxacin in SPS.The apparent differences in pollution sources and landscapes in different reaches led to the obvious spatial patterns of antibiotics in the Kaidu River.Higher partition coefficient of antibiotic between SPS and water phases for sulfonamides than tetracyclines was because that tetracyclines strongly responded to clay contents while sulfonamides significantly responded to organic carbon contents in SPS.There were significant differences in detected antibiotic categories between the river and the lake.Fluoroquinolones(especially ciprofloxacin and enrofloxacin)were detected in the lake while sulphacetamide was only detected in the river.Therefore,the surrounding husbandry and aquaculture around the Bosten Lake was an important antibiotic pollution source in addition to inputs from the Kaidu River.This research suggested that alpine lakes could be an important sink of antibiotics in alpine dry regions,and thus impose greater threats to the aquatic ecosystem.

关 键 词：ANTIBIOTICS Lotic-lentic contamination Suspended sediment Partition 

分 类 号：X52[环境科学与工程—环境工程] X713