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研究论文

王学彤,贾金盼,李元成,孙阳昭,吴明红,盛国英,傅家谟.电子废物拆解区河流沉积物中多氯萘的污染水平、分布特征及来源[J].环境科学学报,2011,31(12):2707-2713

Concentration, distribution, and source identification of polychlorinated naphthalenes in sediments from an electronic waste recycling area

摘要：为了解路桥地区河流沉积物中多氯萘(PCNs)的污染水平、空间分布特征及来源, 用GC-NCI-MS法测定了该区38个沉积物样品中PCNs的含量. 结果表明,所有沉积物样品中∑PCNs在0.13~350.00 ng·g^-1之间, 平均值为17.30 ng·g^-1. 多数样品中主要的同族体为tri-CNs, 占10.2%~85.0%(平均值为55.3%), 其次是tetra-CNs和penta-CNs, 分别占3.9%~50.6%和2.4%~59.6%. 聚类分析和燃烧指示物分析表明, 大部分采样点主要受HW1000污染, 少部分采样点分别受HW1013、Ar1016和HW1014、Ar1232、1248、1254污染, 6个采样点电子废物燃烧对其有贡献.与其它研究相比, 研究区域内沉积物中PCNs污染处于中低水平, 主要表现为点源污染, 值得关注. 毒性分析显示, 研究区域内PCNs毒性当量(TEQs)低于其它的研究区域.

Abstract：In order to understand the contents, spatial distribution and sources of polychlorinated naphthalenes (PCNs) in the river sediments from Luqiao, the concentrations of PCNs in 38 sediment samples were analyzed by GC-NCI-MS. The total concentrations of PCNs (∑PCNs) in all samples ranged from 0.13 to 350.00 ng·g^-1, with a mean of 17.30 ng·g^-1.Tri-CNs was the most predominant homologue in most of the samples, accounting for 10.2%~85.0% with a mean of 55.3%, followed by tetra-CNs and penta-CNs accounting for 3.9%~50.6% and 2.4%~59.6%, respectively. Cluster analysis and combustion marker analysis showed that most of the sampling sites were mainly polluted by HW1000, and a small number of sites were mainly polluted by HW1013, Ar1016 and HW1014, Ar1232, 1248 and 1254, respectively. Among them, 6 sites were affected by e-waste burning process. Compared to other studies, the PCNs concentrations in the present study were at a lower-middle level. However, it should be noted that a few of sampling sites were characterized by point source pollution. The toxic assessment suggested that the TEQs of PCNs in Luqiao were lower than those in other areas.