| 电子废物拆解区河流沉积物中多溴二苯醚的污染水平、分布及来源 |
| 摘要点击 2555 全文点击 1696 投稿时间：2010-05-08 修订日期：2010-09-10 |
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| 中文关键词 电子废物 沉积物 多溴二苯醚 分布 聚类分析 来源 |
| 英文关键词 electronic waste sediment polybrominated diphenyl ethers (PBDEs) distribution hierarchical cluster analysis (HCA) source |
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| 中文摘要 |
| 用GC-NCI-MS分析法测定了路桥河流表层沉积物中41种多溴二苯醚同类物的含量. 目的是了解该地区沉积物中PBDEs的污染水平、空间分布特征和来源. 结果表明,所有沉积物样品中40PBDEs(不包括BDE209)的含量为0.177～161 ng·g-1,平均值为22.5 ng·g-1, BDE209的含量为0.36～958 ng·g-1,平均值为148 ng·g-1. 同族体组成特征表明多数样品中十溴二苯醚(BDE209)是最主要的同族体,占38.4%～96.0%, 平均值为74.4%,九溴PBDEs和七溴PBDEs次之, 分别占3.3%～25.8%和0.01%～14.1%. PBDEs同类物之间呈显著性相关,表明大多数PBDEs同类物有相似的输入途径.同族体组成和聚类分析表明,所有采样点均受到deca-BDE工业品的污染,另有一些采样点除受到deca-BDE工业品的污染外, octa-BDE工业品也有一定的贡献. 与国内外其它研究相比,研究区域内沉积物中的PBDEs污染处于中低水平,但个别样点受点源污染影响较大,值得关注. |
| 英文摘要 |
| The concentrations of 41 polybrominated diphenyl ethers (PBDEs) in the river sediments from Luqiao were analyzed by GC-NCI-MS. The objectives of this study were to understand the contents, spatial distribution and sources. The 40PBDEs (excluding BDE209) concentrations in sediments sampled were in the range of 0.177 to 161 ng·g-1, with a mean of 22.5 ng·g-1，and the concentrations of BDE209 were from 0.36 to 958 ng·g-1, with a mean of 148 ng·g-1. Deca-BDE was the most predominant in 9 PBDE homologues in most of samples, accounting for 38.4%-96.0%, with an average of 74.4%, followed by nona-BDEs and hepta-BDEs, accounting for 3.3%-25.8% and 0.01%-14.1%, respectively. Significant correlations were observed among all of PBDEs congeners, which suggested these PBDEs might have the similar sources. The homologue composition of PBDEs and hierarchical cluster analysis (HCA) showed that most of sampling sites were mainly polluted by deca-BDE formulation, and others polluted by deca-BDE and octa-BDE formulations. Compared to other studies from different countries and regions, the PBDEs concentrations in the present study were at a medium-to-low level. But it should be concerned that a few of sampling sites were highly contaminated by point sources. |
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