摘要
采用GC/MS方法测定了上海市西南郊区7条主要河流13的断面的多氯联苯(PCBs)含量,讨论了PCBs在水体中的含量分布、污染现状、组分特征和毒性当量。共有14种PCBs同系物有不同程度检出,其中五氯联苯含量最高,PCBs质量浓度在143.4 ng/L～201.8 ng/L之间,均值159.1 ng/L,处于中等污染水平。13个检测断面的PCBs对人类和鱼类毒性当量均值分别为1.781 pg/g和<0.084 pg/g。PCB 126对毒性当量的贡献值最大。由于PCBs具有生态累积效应,危害不容忽视。
The concentration levels of PCBs in thirteen surface water samples of seven main rivers collected at southwest suburb of Shanghai were analyzed by GC/MS.The spatial distribution,pollution level,composition characteristics and toxic equivalency of PCBs were discussed.The results showed that fourteen PCBs congeners were detected in surface-water,among which the penta-chloinated biphenyls are abundant in all samples.Values of PCBs were in a range of（143.4~201.8）ng/L,with an average value of 159.1ng/L.The content of PCBs in water of Shanghai southwest suburb was on the average pollution level.TEQs of PCBs for human being and fish were 1.781 pg/ g and 0.084 pg/g respectively,and the maximum values were contributed by PCB 126.The potential hazards should not be ignored for their accumulative effect in the environment.
出处
《环境监测管理与技术》
2011年第B12期44-48,共5页
The Administration and Technique of Environmental Monitoring
基金
上海市闵行区自然科学研究基金资助项目(2010MHZ004)
