文献类型： 外文期刊

作者： Huang, Huanfang ¹ ; Liu, Huafeng ³ ; Xiong, Shuai ⁴ ; Zeng, Faming ⁵ ; Bu, Jianwei ² ; Zhang, Biao ⁶ ; Liu, Wei ⁴ ; Zhou, ¹ ;

作者机构： 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China

2.China Univ Geosci, Sch Environm Studies, Wuhan 430078, Peoples R China

3.Shandong Inst Geol Survey, Jinan 250013, Peoples R China

4.China Univ Geosci, Inst Geol Survey, Wuhan 430074, Peoples R China

5.Foshan Univ, Sch Environm & Chem Engn, Foshan 528000, Peoples R China

6.Binzhou Ecol Environm Comprehens Serv Ctr, Binzhou 256600, Peoples R China

7.CAGS, Key Lab Karst Dynam, MNR, Guilin 541004, Peoples R China

8.CAGS, Guangxi Inst Karst Geol, Guilin 541004, Peoples R China

9.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430078, Peoples R China

10.Beijing Acad Agr & Forestry Sci, Beijing Res Ctr Agr Stand & Testing, Beijing 100097, Peoples R China

11.China Univ Geosci, Hubei Prov Engn Res Ctr Systemat Water Pollut Con, Wuhan 430078, Peoples R China

12.Xinjiang Prod & Construct Corps, Div 9, Ecol Environm Monitoring Stn, Tacheng 834601, Xinjiang, Peoples R China

关键词： Karst; Groundwater; Organochlorine pesticides (OCPs); Fresh input; Groundwater vulnerability; Three Gorges

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：6.551； 五年影响因子：6.419 ）

ISSN： 0048-9697

年卷期： 2021 年 775 卷

页码：

收录情况： SCI

摘要： Karst groundwater is crucial, but particularly vulnerable to contaminants. Anthropologically derived pollutants on the surface-environment in karst areas could easily and rapidly enter groundwater through highly developed transmissible structures and threaten water safety. To investigate such transport, we analyzed 24 organochlorine pesticides (OCPs) in themultimedia environment fromthe Zigui karst area of China, where agriculture is the predominant human activity. OCPs were frequently detected with the total OCP concentrations ranged from 228 to 7970 pg/g, 300 to 32,200 pg/L, 318 to 2250 pg/L, 149 to 2760 pg/g, and 752 to 12,000 pg/g in the soil, springwater, river water, spring sediment, and river sediment, respectively. HCB and p,p'-DDT were the most dominant OCP species. Isomeric and metabolic ratios indicated fresh inputs of Lindane, technical DDT, and Aldrin, although they have been banned in China. The spatial distributions, correlation analysis, and regression analysis suggested rapid OCP transport from the soil to the spring water, and from the soil and spring water to river water. OCPs in the soil and springs explained 92.3% and 89.0% of those in the springwater and river water, respectively. The solid transport with the fast-moving water was predominant for OCPs in sediments. Highly dynamic water systems and rapid OCP transport in the intro- and inter-mediumsuggested by our results substantiate the groundwater's vulnerability in karst areas. More studies on levels and transport of organic contaminants in karst systems and policy for protecting the karst groundwater are urgently required to control contaminant sources and ensure groundwater sustainability, since the karst water resources may suffer a potentially bleak future consisted of the decreased groundwater quantity and low water quality. (c) 2021 Elsevier B.V. All rights reserved.