Zhou Rongbing, Zhu Lizhong, Kong Qingxia
Institute of Environmental Science & Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
J Hazard Mater. 2008 Apr 15;152(3):1192-200. doi: 10.1016/j.jhazmat.2007.07.103. Epub 2007 Aug 6.
Various shellfish collected from different locations along the Qiantang River in 2006 were analyzed for the levels of 13 organochlorine pesticides (OCPs) in order to elucidate the status of OCPs pollution in shellfish for human consumption. Total concentrations of OCPs in shellfish ranged from 16.9 to 78.6 ng/g wet weight (ww), with HCHs (alpha-, beta-, gamma-, delta-HCH), DDTs (p,p'-DDD, p,p'-DDE, p,p'-DDT, o,p'-DDD) and other OCPs (aldrin, diedrin, endrin, heptachlor and heptachlor epoxide) in the range of 3.33-13.2, 8.38-40.1 and 2.32-14.3 ng/g ww, respectively. The dominant OCPs in shellfish were p,p'-DDE among DDTs, beta-HCH among HCHs and heptachlor epoxide among other OCPs. It is noticeable that higher OCPs biota-sediment accumulation factor (BSAF) occurred at site with high concentration of OCPs in sediments. The field bioconcentration factor (BCF) increased exponentially with the increase of Kow (octanol-water partition coefficients) of the OCPs. Concentrations of DDTs and HCHs in shellfish from Qiantang River kept at middle level compared with those from marine environment. The concentrations of DDTs in more than 50% of edible shellfish in this study were higher than the limit of 14.4 ng/g ww for human consumption recommended by US EPA (2000).
2006年，对采自钱塘江不同地点的各类贝类进行了分析，以测定其中13种有机氯农药（OCPs）的含量，从而阐明供人类食用的贝类中OCPs的污染状况。贝类中OCPs的总浓度范围为16.9至78.6纳克/克湿重（ww），其中六氯环己烷（α-、β-、γ-、δ-六氯环己烷）、滴滴涕（p,p'-滴滴滴、p,p'-滴滴伊、p,p'-滴滴涕、o,p'-滴滴滴）和其他OCPs（艾氏剂、狄氏剂、异狄氏剂、七氯和七氯环氧化物）的浓度范围分别为3.33 - 13.2、8.38 - 40.1和2.32 - 14.3纳克/克湿重。贝类中占主导地位的OCPs，在滴滴涕中是p,p'-滴滴伊，在六氯环己烷中是β-六氯环己烷，在其他OCPs中是七氯环氧化物。值得注意的是，在沉积物中OCPs浓度较高的地点，OCPs生物群-沉积物积累因子（BSAF）也较高。现场生物浓缩因子（BCF）随OCPs的正辛醇-水分配系数（Kow）的增加呈指数增长。与海洋环境中的贝类相比，钱塘江贝类中滴滴涕和六氯环己烷的浓度处于中等水平。本研究中超过50%的可食用贝类中滴滴涕的浓度高于美国环境保护局（2000年）推荐的人类食用限量14.4纳克/克湿重。
