潮水洞岩溶系统中有机氯农药的时空分布特征,来源与迁移

赵培培; 熊俊武; 张超; 杨秀雯; 秦超杰; 钱喆; 赵亚辉; 张学明; 刘伟; 祁士华; 陈伟

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (1) : 292-301.

新污染物

潮水洞岩溶系统中有机氯农药的时空分布特征,来源与迁移

赵培培^1,2, 熊俊武^1,2, 张超^1,2, 杨秀雯^1,2, 秦超杰³, 钱喆⁴, 赵亚辉^1,2, 张学明⁵, 刘伟³, 祁士华^1,4, 陈伟^1,2,3,4,6

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Temporal and spatial distribution, sources, and transport of organochlorine pesticides in the Chaoshuidong karst system

ZHAO Pei-pei^1,2, XIONG Jun-wu^1,2, ZHANG Chao^1,2, YANG Xiu-wen^1,2, QIN Chao-jie³, QIAN Zhe⁴, ZHAO Ya-hui^1,2, ZHANG Xue-ming⁵, LIU Wei³, QI Shi-hua^1,4, CHEN Wei^1,2,3,4,6

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摘要

为研究岩溶地下水易受地表污染物影响的问题,选取了湖北宜昌一典型岩溶泉域——潮水洞为研究对象,采集了一年四季的水体.土壤和沉积物样品,分析了有机氯农药(OCPs)在岩溶泉系统中的污染特征,来源及迁移过程.结果表明,潮水洞地表水和泉水中OCPs的平均浓度为8.25ng/L和5.11ng/L,土壤及沉积物中OCPs的平均浓度分别为15.9ng/g和12.6ng/g.与其他地区相比,潮水洞岩溶泉域中OCPs的污染处于较低水平,其季节性变化特点与当地水文地质条件及OCPs迁移过程密切相关.HCHs和DDTs的特征比值溯源结果显示,水体和沉积物中的HCHs主要来源于林丹(γ-HCH)的输入,土壤中的HCHs则主要来源于工业HCHs的输入;DDTs在水体,土壤和沉积物3种介质中都是属于混合来源,即来源于工业DDT和三氯杀螨醇.研究表明,补给区土壤中OCPs对上游地表水中OCPs的贡献率为87.8%,对泉水的贡献率为58.3%,排泄区泉水中OCPs对泉沉积物中OCPs的贡献率为64.2%.OCPs可通过地表迁移和地下迁移两种方式从补给区迁移至排泄区污染水体.

Abstract

This study investigated the susceptibility of karst groundwater from surface pollution. A typical karst spring system (the Chaoshuidong in Yichang, Hubei Province of China) was selected to analyze the contamination characteristics, sources, and transport processes of organochlorine pesticides (OCPs). Water, soil, and sediment samples were collected in four seasons for OCP analysis. The results showed that the average concentrations of OCPs in surface water, spring water, soil and sediment samples from Chaoshuidong system were 8.25ng/L, 5.11ng/L, 15.9ng/g and 12.6ng/g, respectively. OCPs concentrations in the Chaoshuidong system were relatively lower than in other regions, with seasonal fluctuations closely correlated to hydrogeological conditions and OCPs transport dynamics. Composition analysis of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) indicated that HCHs were primarily from agricultural inputs of Lindane(γ-HCH) in the water and sediments, while the technical HCH dominated in the soils. DDTs were mainly a mixture of inputs from technical DDT and dicofol pesticide in all three media. The contribution of OCPs from the soils in the recharge area to the upstream surface water and to the spring water was 87.8% and 58.3%, respectively, and the contribution of OCPs from the spring water in the discharge area to the spring sediments was 64.2%. This study demonstrated that OCPs can be rapidly transported from recharge area to discharge area through two primary pathways: surface transport and underground transport, subsequently contaminating water bodies.

导出引用

赵培培, 熊俊武, 张超, 杨秀雯, 秦超杰, 钱喆, 赵亚辉, 张学明, 刘伟, 祁士华, 陈伟. 潮水洞岩溶系统中有机氯农药的时空分布特征,来源与迁移[J]. 中国环境科学. 2025, 45(1): 292-301

ZHAO Pei-pei, XIONG Jun-wu, ZHANG Chao, YANG Xiu-wen, QIN Chao-jie, QIAN Zhe, ZHAO Ya-hui, ZHANG Xue-ming, LIU Wei, QI Shi-hua, CHEN Wei. Temporal and spatial distribution, sources, and transport of organochlorine pesticides in the Chaoshuidong karst system[J]. China Environmental Science. 2025, 45(1): 292-301

中图分类号： X52

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基金

国家重点研发计划“场地土壤污染成因与治理技术”重点专项项目(2019YFC1805502);国家自然科学基金青年项目(41907327,42007178);中国地质调查局地质调查项目(DD2019082);中国地质大学(武汉)中央高校基本科研业务费特色学科团队专项项目(G1323523063);资源与生态环境地质湖北省重点实验室开放基金资助项目(HBREGKFJJ-202301)