| 海河流域14条河流表层沉积物中多溴联苯醚的分布特征 |
| 摘要点击 3091 全文点击 1866 投稿时间：2010-08-04 修订日期：2010-10-11 |
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| 中文关键词 海河流域 河流 沉积物 多溴联苯醚 分布特征 |
| 英文关键词 Haihe River basin tributaries sediment PBDEs distribution character |
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| 中文摘要 |
| 海河流域是我国受人类活动扰动强度最大的地区，为了解多溴联苯醚（PBDEs）在该流域的污染现状与分布特征，通过采集14条主要河流的48个表层沉积物样品，采用高分辨的GC-MS/MS技术对干燥后的沉积物中27种PBDEs进行分析.结果发现沉积物中PBDEs的平均含量范围为0.06～2.10 ng·g-1；其中徒骇河沉积物样品中PBDEs的检出含量最高为2.10 ng·g-1，以BDE184，207、197、191、183和156等高溴代同族体为主，占PBDEs总量的40%以上；而其他河流沉积物主要以BDE15、28和47等低溴代同族体污染为主，占PBDEs总量的22%以上.实验结果与国内外最近的文献报道值相比较，显示在采集的河流表层沉积物中PBDEs的含量处于低污染水平. |
| 英文摘要 |
| Violent disturbance are occurring in Haihe River basin due to a large number of human activities. To investigate the PBDEs pollution status and their distribution character, 48 surface sediment samples (at the top 0-5 cm layer) were collected from 14 principal tributaries in Haihe River basin. The contents of 27 PBDEs congeners in sediments were measured using Varian CP3800/300 GC-MS/MS technique. The measured level of PBDEs ranged from 0.06 to 2.10 ng g-1, the highest concentrations of PBDEs were detected in the sediment samples from Tuhai River, with geometric mean 2.10 ng·g-1. BDE184, 207, 197, 191, 183 and 156 were the most predominant PBDE congeners, with their concentrations accounting for 40% of the total PBDEs concentration observed in the samples. Whereas BDE15, 28 and 47 were the primary PBDE congeners in the sediments from other rivers, with their concentration accounted for over 22% of the total PBDEs concentration. The PBDEs levels monitored in the present study were compared to those reported recently for districts located in other countries. The concentrations of PBDEs in the sediment samples were in the same order of magnitude of those reported on background levels in remote lakes sediment in European and American countries, which shows low-level PBDEs contamination in sediments. |
