电子废物拆解区河流沉积物中多氯联苯的污染水平、分布及来源  

Levels,Distribution and Possible Sources of Polychlorinated Biphenyls in River Sediments from an Electronic Waste Recycling Area

作　　者：王学彤[1] 李元成[1] 缪绎[1] 张媛[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,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7期2347-2351,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分析法测定了浙江台州路桥河流表层沉积物中144种多氯联苯同类物的含量.目的是了解该地区河流沉积物中PCBs的污染水平、空间分布特征和可能来源.结果表明,在路桥区河流沉积物样品中PCBs同类物均有不同程度检出,ΣPCBs的浓度范围1.66～5 930 ng.g-1,均值为763 ng.g-1.样品组成以tri-CBs、tetra-CBs和penta-CBs为主,含量百分比范围分别为2.63%～57.6%、10.4%～54.6%和7.82%～46.1%;octa-CBs和deca-CB含量最低,含量百分比范围分别为0～8.57%和0～11.0%.聚类分析表明,22个样品的污染与Ar1248有关,9个样品的污染与Ar1254有关;6个样品的污染与Ar1016、Ar1232和Ar1242有关.与国内外其它研究及相关环境质量标准相比,该区域表层沉积物PCBs污染处于中高水平,具有较高的生态风险.The concentrations of 144 polychlorinated biphenyls （PCBs） in the river sediments from Luqiao were analyzed by GC- μECD. The objectives of this study were to understand the contents, spatial distribution and possible sources of PCBs. The Z PCBs concentrations detected in the river sediments were in the range of 1.66 to 5 930 ng.g-l, with a mean of 763 ng.g-1. Tri-CBs, tetra- CBs and penta-CBs were the primary PCB congeners in all samples, accounting for 2. 63% -57.6% , 10.4% -54. 6% and 7.82% - 46. 1% , respectively. Octa-CBs and deca-CBs were the minor PCB congeners in all samples, with the percentages of 0-8.57% and 0- 11.0% , respectively. The hierarchical cluster analysis （HCA） showed that 22 samples were mainly polluted by Ar1248, 9 samples were polluted by Ar1254, and 6 samples were contaminated by Arl016, Ar1232 and Ar1242. The PCBs concentrations found in the present study were at an upper-middle level compared with those in other studies in the world. The PCBs pollution in the present area had a high ecological risk.

关 键 词：电子废物 沉积物 多氯联苯 分布 聚类分析 来源 

分 类 号：X131.2[环境科学与工程—环境科学]