摘要
采用GC-ECD对长江口及东海近岸表层沉积物中16种有机氯农药(OCPs)残留进行了测定。结果表明,OCPs总量在(8.31~52.61)×10-9之间,组分分布特征分析显示,六六六类(HCHs)农药的来源可能与早期土壤的残留或大气远距离输送有关,滴滴涕类(DDTs)污染除了来自早期土壤残留外,近期可能有新的含DDTs农药成分的物质输入;相关性分析揭示总有机碳(TOC)是影响沉积物中有机氯农药分布的重要原因;与国内外不同地区沉积物中有机氯农药残留相比,长江口及东海近岸有机氯农药污染水平中等,存在一定的潜在生态风险。
Surface sediments from Changjiang Estuary and nearshore of the East China Sea were collected and analyzed for 16 organochlorine pesticides(OCPs).Concentrations of OCPs residues in sediments were determined using gas chromatography coupled by ECD detector(GC-ECD).The results showed that the level of OCPs in sediments was(8.31~52.61)×10-9.Analysis of distribution characteristics of components showed that HCHs were in connection with the early residue in sediments and remote atmosphere pollutant transport;DDTs residues in sediments were not only related to the early residues in environment,but also related to input of DDTs components lately;TOC content influences the distribution of OCPs in sediments strongly.Compared with other regions,the contamination level of OCPs in sediments of Changjiang Estuary and nearshore of the East China Sea was moderate.The result of evaluation showed that OCPs in sediments from Changjiang Estuary and nearshore of the East China Sea had a medium ecological risk.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2011年第1期52-56,共5页
Marine Environmental Science
基金
上海市教委创新项目(08YZ118)
上海市教委高校第五期海洋环境工程重点学科(J50702)
上海市教委项目(05KZ12)
同济大学长江水环境教育部重点实验室开放课题(YRWEF06005)
关键词
长江口及东海近岸
表层沉积物
有机氯农药
风险评价
Changjiang Estuary and nearshore of the East China Sea; surface sediments; OCPs; risk evaluation