Zhou Rongbing, Zhu Lizhong, Yang Kun, Chen Yuyun
Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310028, China.
J Hazard Mater. 2006 Sep 1;137(1):68-75. doi: 10.1016/j.jhazmat.2006.02.005. Epub 2006 Mar 15.
The levels of 13 organochlorine pesticides (OCPs) in surface water and sediments from Qiantang River in East China were investigated to evaluate their potential pollution and risks. A total of 180 surface water samples at 45 sampling sites and 48 sediment samples at 19 sampling stations were collected along the river in four seasons of 2005. Soil samples and wet deposition samples were also collected to provide evidence on the source of OCPs pollution. The total OCPs concentrations in surface water and sediments were 7.68-269.4 ng/L and 23.11-316.5 ng/g-dry weight (dw), respectively. The concentrations of OCPs in sediments were in the range of 8.22-152.1 ng/g-dw for HCHs (alpha-, beta-, gamma-, delta-HCH), 1.14-100.2 ng/g-dw for DDTs (p,p'-DDD, p,p'-DDE, p,p'-DDT o,p'-DDD), 9.41-69.66 ng/g-dw for other OCPs (aldrin, diedrin, endrin, heptachlor, heptachlor epoxide). The total OCPs concentrations in soils and wet deposition were 5.04-214.9 ng/g-dw and 16.18-242.4 ng/L, respectively. Among the OCPs, HCHs, DDTs and heptachlor were the most dominant compounds in the sediments. The dominant OCPs in water were gamma-HCH among HCHs, heptachlor among other OCPs and p,p'-DDE among DDTs. Also, different contamination patterns among sampling seasons were found. The concentrations of OCPs in sediment collected in spring were higher than those in summer and autumn. In contrast, the concentrations of OCPs in surface water in summer and autumn were higher among four sampling seasons. Distribution of HCHs, DDTs and other OCPs were different indicating their different contamination sources. The notable contamination was found in Fuchun reservoir. Composition analyses in sediments indicated a recent usage or discharge of lindane into the river.
对中国东部钱塘江地表水和沉积物中13种有机氯农药（OCPs）的含量进行了调查，以评估其潜在污染和风险。2005年四季，沿钱塘江共采集了45个采样点的180份地表水样品和19个采样站的48份沉积物样品。还采集了土壤样品和湿沉降样品，以提供OCPs污染来源的证据。地表水和沉积物中OCPs的总浓度分别为7.68 - 269.4 ng/L和23.11 - 316.5 ng/g干重（dw）。沉积物中六氯环己烷（α-、β-、γ-、δ-六氯环己烷）的浓度范围为8.22 - 152.1 ng/g-dw，滴滴涕（p,p'-滴滴滴、p,p'-滴滴伊、p,p'-滴滴涕、o,p'-滴滴滴）的浓度范围为1.14 - 100.2 ng/g-dw，其他OCPs（艾氏剂、狄氏剂、异狄氏剂、七氯、环氧七氯）的浓度范围为9.41 - 69.66 ng/g-dw。土壤和湿沉降中OCPs的总浓度分别为5.04 - 214.9 ng/g-dw和16.18 - 242.4 ng/L。在OCPs中，六氯环己烷、滴滴涕和七氯是沉积物中最主要的化合物。水中主要的OCPs是六氯环己烷中的γ-六氯环己烷、其他OCPs中的七氯和滴滴涕中的p,p'-滴滴伊。此外，还发现了不同采样季节之间不同的污染模式。春季采集的沉积物中OCPs的浓度高于夏季和秋季。相比之下，四个采样季节中夏季和秋季地表水的OCPs浓度较高。六氯环己烷、滴滴涕和其他OCPs的分布不同，表明它们的污染来源不同。在富春水库发现了明显的污染。沉积物成分分析表明近期林丹曾被使用或排放到河中。
