淀山湖表层水、沉积物和鱼体中有机氯农药的时空变化及人体暴露风险
发布时间：2018-08-31 19:43
【摘要】：有机氯农药(organochlorine pesticides,OCPs)是一类持久性有机污染物,研究它们在城市近郊湖泊的污染状况,有助于更好地了解其对湖泊水环境的影响.研究了上海近郊淀山湖表层水、沉积物和鱼体中的OCPs污染状况及人体暴露的健康风险.结果表明,六六六(hexachlorocyclohexanes,HCHs)和滴滴涕(dichlorodiphenyltrichloroethanes,DDTs)分别是表层水和沉积物中的主要OCPs污染物,OCPs在淀山湖野生鱼体中也有检出.淀山湖中HCHs和DDTs的来源主要是历史残留.沉积物中的OCPs浓度相对比较稳定,但表层水中的浓度随采样时间有一定变化,即丰水期浓度高于枯水期.淀山湖进水区域的污染程度普遍高于出水区域.考察了饮食摄入(食鱼和饮水)、呼吸和皮肤渗透(游泳)3种途径对人体暴露量的影响,发现饮食摄入是DDTs和HCHs的主要暴露源.淀山湖水环境已受到OCPs的影响,但污染水平不高且不会产生健康风险.
[Abstract]:Organochlorine pesticides (organochlorine pesticides,OCPs) are a class of persistent organic pollutants (pops). The study of their pollution in urban lakes is helpful to better understand their effects on lake water environment. The pollution of OCPs in the surface water, sediment and fish body of Dianshan Lake in the suburb of Shanghai and the health risk of human exposure were studied. The results showed that hexachlorocyclohexane (hexachlorocyclohexanes,HCHs) and DDT (dichlorodiphenyltrichloroethanes,DDTs) were the main OCPs pollutants in surface water and sediment, respectively, and they were also detected in wild fish of Dianshan Lake. The sources of HCHs and DDTs in Dianshan Lake are mainly historical residues. The concentration of OCPs in sediment is relatively stable, but the concentration of surface water varies with the sampling time, that is, the concentration in high water period is higher than that in dry season. The level of pollution in the influent area of Dianshan Lake is generally higher than that in the effluent area. The effects of dietary intake (fish and drinking water), respiration and skin penetration (swimming) on human exposure were investigated. It was found that dietary intake was the main source of exposure to DDTs and HCHs. The water environment of Dianshan Lake has been affected by OCPs, but the pollution level is not high and there is no health risk.
【作者单位】： 上海大学环境与化学工程学院环境污染与健康研究所;
【基金】：国家自然科学基金资助项目(21277087) 中科院重点实验室开放基金资助项目(SKLEAC201411)
【分类号】：X592;X524
[Abstract]:Organochlorine pesticides (organochlorine pesticides,OCPs) are a class of persistent organic pollutants (pops). The study of their pollution in urban lakes is helpful to better understand their effects on lake water environment. The pollution of OCPs in the surface water, sediment and fish body of Dianshan Lake in the suburb of Shanghai and the health risk of human exposure were studied. The results showed that hexachlorocyclohexane (hexachlorocyclohexanes,HCHs) and DDT (dichlorodiphenyltrichloroethanes,DDTs) were the main OCPs pollutants in surface water and sediment, respectively, and they were also detected in wild fish of Dianshan Lake. The sources of HCHs and DDTs in Dianshan Lake are mainly historical residues. The concentration of OCPs in sediment is relatively stable, but the concentration of surface water varies with the sampling time, that is, the concentration in high water period is higher than that in dry season. The level of pollution in the influent area of Dianshan Lake is generally higher than that in the effluent area. The effects of dietary intake (fish and drinking water), respiration and skin penetration (swimming) on human exposure were investigated. It was found that dietary intake was the main source of exposure to DDTs and HCHs. The water environment of Dianshan Lake has been affected by OCPs, but the pollution level is not high and there is no health risk.
【作者单位】： 上海大学环境与化学工程学院环境污染与健康研究所;
【基金】：国家自然科学基金资助项目(21277087) 中科院重点实验室开放基金资助项目(SKLEAC201411)
【分类号】：X592;X524
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