摘要
沿闽江干流沿岸采集19个表层土壤样品及1个河口沉积物柱样,采用气相色谱(GC-ECD)内标法分析其有机氯农药(OCPs)的含量,揭示了研究区土壤及河口沉积柱中有机氯农药的残留水平、分布及来源.结果表明,干流沿岸土壤中总的OCPs含量(干重)范围为4.31～877.80 ng.g-1,平均值为74.13 ng.g-1,且闽江干流沿岸土壤及河口沉积物中滴滴涕(DDTs)的含量明显高于六六六(HCHs).检出的HCHs含量分布范围为1.32～24.01 ng.g-1,平均值为7.50 ng.g-1,DDTs含量分布范围为1.67～876.49 ng.g-1,平均值为66.64 ng.g-1.受传统农业用地及农药化工企业分布的影响,闽江干流下游土壤中OCPs的含量分布呈非均一性.沉积柱样中HCHs和DDTs的含量分别为0.34～11.72 ng.g-1、1.12～31.04 ng.g-1.通过来源分析,表明该地区近年来DDTs仍有输入,这可能与DDT的替代品-三氯杀螨醇的使用有关.闽江干流沿岸土壤及河口沉积柱中有机氯农药的含量分布基本反映了闽江干流沿岸地区有机氯农药生产使用的历史和现状.
The 19 soil samples and one sediment core were collected from near the banks and in estuary of the Minjiang River.The concentrations of OCPs in the samples were determined by GC-ECD with the internal standard method.The results showed that the concentrations of OCPs,HCHs,DDTs in soils near the banks of Minjiang were in the ranges of 4.31-877.80 ng.g-1（with a mean 74.13 ng.g-1）,1.32-24.01 ng.g-1（7.50 ng.g-1）,1.67-876.49 ng.g-1（66.64 ng.g-1）,respectively.Through the study of the vertical distribution characteristics of OCPs in the area,the pollution history of OCPs in the Minjiang estuary was discussed.The concentrations of HCHs and DDTs in the core ranged from 0.34-11.72 ng.g-1 and 1.12-31.04 ng.g-1,respectively.The results also showed that the soils and cores in the area have polluted lightly by DDTs,but not been polluted by HCHs.Upper section of the sediment core,o,p′-DDT was the main composition,which indicated that new DDTs may be still used recently in the Minjiang area.The vertical changes of OCPs reflected basically their production and application history in banks of Minjiang River,Fujian Province.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2011年第3期673-679,共7页
Environmental Science
基金
国家地质调查协作项目(2004044014,GZTR20080105-01)
国家自然科学基金项目(40473034)
关键词
闽江干流
闽江口
土壤
沉积物柱样
有机氯农药
分布特征
Minjiang River
Minjiang Estuary
soil
sediment core
organochlorine pesticides（OCPs）
distribution
