Rapid transport of organochlorine pesticides (OCPs) in multimedia environment from karst area
Rapid transport of organochlorine pesticides (OCPs) in multimedia environment from karst area
复制标题
喀斯特地区多媒体环境中有机氯农药（OCP）的快速传输
DOI：
10.1016/j.scitotenv.2021.145698
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发表时间：
2021-02-23
影响因子：
9.8
通讯作者：
Chen, Wei
中科院分区：
文献类型：
--
作者：
Huang, Huanfang;Liu, Huafeng;Chen, Wei
岩溶地下水至关重要，但特别容易受到污染。岩溶地区地表环境中人类活动产生的污染物可以通过发育的导水构造迅速进入地下水，威胁水安全。为了探讨这种传输，我们分析了24种有机氯农药（OCPs）的多介质环境中从中国秭归喀斯特地区，农业是主要的人类活动。土壤、泉水、河水、泉水沉积物和河流沉积物中经常检测到OCP，总OCP浓度范围分别为228 - 7970 pg/g、300 - 32，200 pg/L、318 - 2250 pg/L、149 - 2760 pg/g和752 - 12，000 pg/g。HCB和p，p '-DDT是最主要的OCP形态。异构体和代谢比率表明，林丹、技术滴滴涕和艾氏剂是新投入的，尽管它们在中国已被禁止。空间分布、相关性分析和回归分析表明，OCP从土壤向泉水、从土壤和泉水向河水的迁移速度较快。土壤和泉水中的有机氯农药分别占泉水和河水中有机氯农药的92.3%和89.0%。沉积物中有机氯农药的迁移主要是以快速流动的水为动力。研究结果表明，岩溶地区地下水系统动态性强，有机氯在介质中的运移速度快，说明岩溶地区地下水具有脆弱性。由于岩溶水资源面临着水量减少、水质下降的严峻形势，因此，加强岩溶水系统中有机污染物的含量、迁移规律的研究和岩溶地下水保护政策的制定，是控制污染源、保证地下水可持续发展的重要措施。(c)2021爱思唯尔有限公司版权所有。
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.