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Abstract：
This paper presented the historical data on the temporal trends of polybrominated diphenyl ethers (PBDEs) in the sediment cores collected from the Huaihe River, Yellow River and Chaohu Lake, China. Among the 40 targeted PBDE congeners, only 10, 6, and 9 of them were detected respectively in the samples from the Huaihe River, Yellow River and Chaohu Lake. On average, the total PBDEs concentrations in sediments were highest in Chaohu Lake followed by the Huaihe River and the Yellow River. As compared to other PBDE congeners, BDE-209 had higher concentrations and detection rates. The similar down core variation between PBDEs and total organic carbon (TOC) suggests that TOC is an important factor influencing PBDEs distribution in the sediments. The total PBDEs concentrations showed an increasing trend from bottom to upper sediments before a decreasing trend in the topmost sediments. The rapid urbanization and industrialization of these regions in recent decades may cause the historically increasing concentrations of sedimentary PBDEs, especially BDE-209. The decreasing PBDEs concentrations in topmost sediments was probably related to the strict environmental policies at present.
摘要：
本文介绍了淮河沉积物岩心中多溴二苯醚（PBDEs）随时间变化的历史数据。黄河和巢湖，中国。在40个目标多溴二苯醚同源物中，在淮河样本中分别检测到10个、6个和9个，黄河和巢湖。平均而言,巢湖沉积物中多溴二苯醚的总浓度最高，其次是淮河和黄河。与其他多溴二苯醚同源物相比，BDE-209具有较高的浓度和检出率。多溴二苯醚和总有机碳(TOC)之间相似的向下核心变化表明，TOC是影响多溴二苯醚在沉积物中分布的重要因素。PBDEs的总浓度从底部沉积物到上部沉积物呈增加趋势，然后在最顶部沉积物中呈下降趋势。这些地区近几十年来的快速城市化和工业化可能导致沉积的多溴二苯醚的浓度在历史上不断增加，尤其是BDE-209。最表层沉积物中多溴二苯醚浓度的降低可能与目前严格的环境政策有关。
