摘要
利用GC-ECD方法测定了汾河太原段30个表层沉积物样品中多氯联苯（PCBs）和有机氯农药（OCPs）的含量,同时对沉积物中PCBs和OCPs的来源和生态风险进行了研究.结果表明,研究区PCBs和OCPs的含量分别为n.d.~50.95μg/kg和2.19~25.24μg/kg.Aroclor检出率最高为Aroclor1260和Aroclor1254,这可能与我国主要生产和使用的PCB有关.OCPs中p,p-DDE含量占优势,研究区HCH和DDT来源于工业和农业输入.生态风险评价结果表明,γ-HCH、DDT（total）,o,p＋p,p-DDT,p,p-DDE,七氯环氧化物,PCBs总量可能会对研究区水生生态环境造成潜在影响,但整体风险水平不高.
Concentration of polychlorinated biphenyls （PCBs） and organochlorine pesticides （OCPs） were determined with GC-ECD in thirty surface sediment samples collected from Fenhe River in Taiyuan, while the pollution sources and ecological risk were studied. The results indicated that the total concentrations of PCBs and OCPs in sediment ranged from n.d.-50.95p.g/kg and 2.19-25.24p.g/kg, respectively. For PCBs, Aroclor1260 and Aroclor1254 were predominant isomers, which might be related to PCBs production and use of history in China. For OCPs, p,p＇-DDE were predominant congeners. Hexachlorocyclohexane （HCH） and dichlorodiphenytrichloroethanes （DDT） originated from industrial and agricultural usage. Ecological risk assessment of sediment indicated that sediments in Fenhe River were not constituted a serious threat to the ecological system, but y-HCH, totle DDT, o,p＇＋p,p＇-DDT, p,p＇-DDE, Heptachlor-exo-epoxide and totle PCBs likely to pose potential biological adverse impact.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2013年第4期714-721,共8页
China Environmental Science
基金
国家自然科学基金资助项目(41071345)
山西省青年科技研究基金(2008021036-4)
山西农业大学科技创新基金(2004046)
关键词
多氯联苯
有机氯农药
含量
来源
生态风险
汾河
polychlorinated biphenyls
organochlorine pesticides
concentrations~ source
ecological risk
Fenhe River
