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洪湖表层沉积物中有机氯农药的含量及组成
引用本文:龚香宜,祁士华,吕春玲,胡立嵩,苏秋克.洪湖表层沉积物中有机氯农药的含量及组成[J].中国环境科学,2009,29(3):269-273.
作者姓名:龚香宜  祁士华  吕春玲  胡立嵩  苏秋克
作者单位:1. 武汉科技大学资源与环境工程学院,湖北,武汉,430081
2. 中国地质大学环境学院,湖北,武汉,430074
摘    要:利用GC-ECD测定了洪湖表层(0~2cm)、次表层(2~10cm)沉积物中有机氯农药的含量,并对其分布、组成及来源进行了探讨.结果表明,HCHs在表层、次表层沉积物中的含量分别为2.05~19.0ng/g和0.66~11.3ng/g,DDTs在表层、次表层沉积物中的含量分别为2.39~25.8ng/g和1.22~27.5ng/g.次表层沉积物中的有机氯农药含量低于表层沉积物,可能是因为有部分已发生迁移或转化.HCHs和DDTs呈现出在河流入湖口处含量较高,近长江处含量降低的趋势,其污染来源主要是河流输入及洪湖市的工农业排污.组分特征表明沉积物中的HCHs主要来源于林丹的使用,而DDTs则主要来源于环境早期残留.

关 键 词:有机氯农药  洪湖  沉积物  
收稿时间:2008-08-11;

Concentrations and composition of organochlorine pesticides in surface sediments from Hong Lake
GONG Xiang-yi,QI Shi-hua,LV Chun-ling,HU Li-song,SU Qiu-ke.Concentrations and composition of organochlorine pesticides in surface sediments from Hong Lake[J].China Environmental Science,2009,29(3):269-273.
Authors:GONG Xiang-yi  QI Shi-hua  LV Chun-ling  HU Li-song  SU Qiu-ke
Abstract:Surface sediments of Hong Lake were divided into upper (0~2cm) and lower part (2~10cm) through sampling process. Concentrations of organochlorine pesticides (OCPs) in the sediments were determined using GC-ECD, and their distribution, composition and source were discussed. HCHs concentration in the upper and lower part sediments were 2.05~19.0ng/g and 0.66~11.3ng/g, respectively. DDTs concentration were 2.39~25.8ng/g and 1.22~27.5ng/g, respectively. Concentrations of OCPs in the lower part were less than those in the upper, which might be some of OCPs in the lower part transported upward. Concentrations of HCHs and DDTs in the sediments were higher in the mouth of a river flowing into the lake, and they were lower near Yangtze River. The concentration trend of HCHs and DDTs showed that they were mainly derived from the river input, industrial and agricultural pollution of Honghu City. Their compositional characteristics indicated that HCHs mainly originated from the application of Lindane, and DDTs mainly from aged environmental residue.
Keywords:organochlorine pesticides  Hong Lake  sediment
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