电子废物拆解区农业土壤中多氯联苯的污染特征  

Characteristics of Polychlorinated Biphenyls in Soils from an Electronic Waste Recycling Area

作　　者：王学彤[1] 李元成[1] 张媛[1] 缪绎[1] 孙阳昭[2] 吴明红[1] 盛国英[1,3] 傅家谟[1,3] 

机构地区：[1]上海大学环境与化学工程学院,环境污染与健康研究所,上海200444 [2]中华人民共和国环境保护部,北京100035 [3]中国科学院广州地球化学研究所有机地球化学国家重点实验室,广州510640

出　　处：《环境科学》2012年第2期587-591,共5页Environmental Science

基　　金：国家自然基金重点项目(40830744);上海市重点学科项目(S30109)

摘　　要：用GC-μECD分析法测定了路桥表层土壤中144种多氯联苯同类物的含量.目的是了解该地区表层土壤中PCBs的污染水平、空间分布特征和来源.结果表明,样品中ΣPCBs为0.779～937 ng.g-1,均值为75.7 ng.g-1,研究区域中南部污染水平较高.同族体组成特征表明,38个样品组成以penta-CBs、hexa-CBs和tetra-CBs为主,含量范围分别为13.0%～61.1%、4.59%～48.8%和10.1%～31.5%;另外3个样品组成以di-CBs为主,范围为47.1%～75.2%.聚类分析表明,大多数样品主要受到Ar1254工业品的污染,少数样品的污染与Ar1221工业品有关.ΣPCBs与TOC显著相关,表明土壤中TOC的含量是影响PCBs在土壤中蓄积的重要因素之一;各PCBs同族体(除di-CBs与nona-CBs之间外)显著相关,表明各PCBs同族体有相似的输入途径.与国内外其它研究相比,研究区域表层土壤PCBs污染处于中高水平.The concentrations of 144 polychlorinated biphenyls（PCBs） in the soils from Luqiao were analyzed by GC-μECD.The objectives of this study were to understand the contents,spatial distribution and sources.The PCBs concentrations in soils samples were in the range of 0.779 ng·g-1 to 937 ng·g-1,with a mean of 75.7 ng·g-1,and the relatively high level of PCBs were mainly distributed in the south central area.Penta-CBs,hexa-CBs and tetra-CBs were the primary homologues in 38 samples,with the range of 13.0%-61.1%,4.59%-48.8% and 10.1%-31.5%,respectively.Di-CBs was the most predominant homologues in other samples,with the range of 47.1%-75.2%.The hierarchical cluster analysis（HCA） showed that most of samples were mainly polluted by Ar1254,few samples were polluted by Ar1221.Significant correlations were observed between PCBs and TOC,which suggested PCBs were affected by TOC in soils.The correlation analysis also showed significant correlation among the PCBs homologues（except di-CBs and nona-CBs）,which suggested PCBs might have the similar sources.Compared to other studies from different countries and regions,the PCBs concentrations in the present study were at an upper-middle level.

关 键 词：电子废物 土壤 多氯联苯 分布 来源 

分 类 号：X131.3[环境科学与工程—环境科学] X53