文章摘要
迭庆杞,聂志强,黄启飞,朱晓华.珠江三角洲土壤中有机氯农药的分布特征[J].农业环境科学学报,2014,33(2):298-304.
珠江三角洲土壤中有机氯农药的分布特征
Organochlorine Pesticides(OCPs) in Soils of Pearl River Delta, China
  
DOI:10.11654/jaes.2014.02.014
中文关键词: 有机氯农药  DDT代谢产物  土壤  分布特征
英文关键词: organochlorine pesticides(OCPs)  DDT metabolites  soil  distribution
基金项目:
作者单位
迭庆杞 中国环境科学研究院 北京 100012 
聂志强 中国环境科学研究院 北京 100012 
黄启飞 中国环境科学研究院 北京 100012 
朱晓华 中国环境科学研究院 北京 100012 
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中文摘要:
      对我国珠江三角洲地区土壤中有机氯农药的污染水平、分布特征和可能来源进行了研究。结果表明,17种有机氯农药在珠三角地区土壤中大部分被检出,其中13种检出率为100%。有机氯农药总残留量(∑17OCPs)为7.40~35.1 ng·g-1,平均为16.7 ng·g-1。DDTs和HCHs是土壤中主要的有机氯农药污染物,其残留量分别达1.83~16.6 ng·g-1和2.62~11.8 ng·g-1。对DDT降解产物的分布特征进行了研究,并首次分析了珠三角土壤中DDTs降解产物DDMU[Bis(chlorophenyl)-1-chloroethylene]和DBP(Dichlorobenzophenone)的残留量,分别为ND~1.42 ng·g-1和0.14~1.82 ng·g-1。DDTs和HCHs的污染特征表明,珠三角地区土壤中HCHs主要来自于早期HCHs农药的使用,部分地区还可能存在着林丹(γ-六氯环己烷)等新输入源;DDTs主要来源于历史使用,但部分地区有三氯杀螨醇等新污染源的输入。
英文摘要:
      Organochlorine pesticides(OCPs) could exist in the environment for long time though they had been phased out. This study investigated concentrations, distribution and possible sources of OCPs in surface soils in the Pearl River Delta, south China. Most of the 17 OCPs were detected in the soils. The detection rates were 100% for 13 OCPs. Total concentrations of all 17 OCPs(Σ17OCPs) ranged from 7.40 to 35.1 ng·g-1 with a mean of 16.7 ng·g-1. Of OCPs, DDTs and HCHs were the major components in the soils, with concentrations ranging from 1.83~16.6 ng·g-1 and 2.62~11.8 ng·g-1, respectively. In addition, DDT metabolites, such as DDMU and DBP, were also detected in the soils. They ranged from ND~1.42 ng·g-1, and 0.14 to 1.82 ng·g-1, respectively. Source assessments indicated that most of the HCHs in the soils came from historical applications of HCHs, but some from lindane(γ-HCH)use. Historical applications of DDTs contributed to its major part in the soils. Additionally, inputs of dicofol mixture were also new sources of OCPs in this region.
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