太湖沉积物中有机氯残留及其风险评估
[Organochlorine residues of sediments in Taihu Lake and its risk evaluation].
作者信息
Yuan Xuyin, Wang Yu, Chen Jun, Sun Cheng, Xu Naizheng
机构信息
Department of Earth Sciences, Nanjing University, Nanjing Institute of Geology and Mineral Resources, Ministry of Land and Resources, Nanjing 210016, China.
出版信息
Huan Jing Ke Xue. 2003 Jan;24(1):121-5.
This study analyzed chlorinated pesticides of sediments in Taihu Lake. The DDT, DDE, DDD, HCH isomers, Aldrin, Diddrin, Hexachlorobenze, Heptachlor were measured in all samples. beta-HCH, p, p'-DDE and Hexachlorobenze had higher concentrations than others. The average values of them were 6.572 ng/g, 1.432 ng/g and 2.158 ng/g, respectively. HCHs in sediments were higher than DDTs. The organochlorine residues in sediments mainly originated form the runoff, atmospherically deposition and industrial sewage. HCHs and DDTs of sediments in Taihu Lake were higher than those of sediments in Chinese rivers, but lower than those of bays reported in some papers. According to the ERL and ERM value of risk evaluation for ocean which can also be applied for lake, sediments in Taihu Lake pose a low risk to consumers of bottom feeders.
本研究分析了太湖沉积物中的氯化农药。对所有样品中的滴滴涕（DDT）、滴滴伊（DDE）、滴滴滴（DDD）、六氯环己烷（HCH）异构体、艾氏剂、狄氏剂、六氯苯、七氯进行了测定。β-六氯环己烷、p,p'-滴滴伊和六氯苯的浓度高于其他物质。它们的平均值分别为6.572纳克/克、1.432纳克/克和2.158纳克/克。沉积物中的六氯环己烷含量高于滴滴涕。沉积物中的有机氯残留主要源于径流、大气沉降和工业污水。太湖沉积物中的六氯环己烷和滴滴涕含量高于中国河流沉积物中的含量，但低于一些文献报道的海湾沉积物中的含量。根据也可应用于湖泊的海洋风险评估的效应浓度低值（ERL）和效应浓度中值（ERM），太湖沉积物对底栖生物消费者构成低风险。
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