The temporal changes of the concentration level of typical toxic organics in the river sediments around Beijing
The temporal changes of the concentration level of typical toxic organics in the river sediments around Beijing
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北京周边河流沉积物中典型有毒有机物浓度水平的时间变化
DOI：
10.1007/s11783-018-1054-7
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发表时间：
2018-12-01
影响因子：
6.4
通讯作者：
Zhong, Wenjue
中科院分区：
文献类型：
--
作者：
Li, Qiang;Xu, Xiong;Zhong, Wenjue
本文研究了北京市周边河流沉积物中五类有毒有机物和内分泌干扰物的现状，分析了北京市大气中多环芳烃（PAHs）、邻苯二甲酸酯（PAEs）、有机氯农药（OCPs）、雌激素（Es）和双酚A（BPA）等5类56种污染物的含量，并与历史文献中的含量进行了比较。并对生态风险进行了评估。多环芳烃、邻苯二甲酸酯类化合物、有机氯农药、挥发性有机污染物和双酚A的总浓度分别为232.5 ~ 5429.7 ng·g-1、2047.2 ~ 18051.5 ng·g-1、4.5 ~ 11.7 ng·g-1、18.1 ~ 105.2 ng·g-1和36.3 ~ 69.6 ng·g-1。在这5种有机物中，PAHs和OCPs的浓度水平在过去10年中显著下降，而PAEs和Es的浓度水平与以往研究相比呈上升趋势。BPA仍然保持在一个中等偏高的水平，就像十年前一样。各采样点的PAEs以及温榆河沉积物中荧蒽、苯并[a]蒽和苯并[a]芘的风险均较高。这些结果补充了北京河流沉积物中有毒有机物浓度水平的数据库。
In this study, the current situation of five types of toxic organics and endocrine disrupters in the sediments of rivers around Beijing, i.e., polycyclic aromatic hydrocarbons (PAHs), phthalic acid esters (PAEs), organic chlorinated pesticides (OCPs), estrogens (Es), and bisphenol A (BPA), which included 56 contaminants, was analyzed and compared with that registered by the historical literatures. The ecological risks were also assessed. The total concentration of PAHs, PAEs, OCPs, Es, and BPA ranged from 232.5 ng·g–1to 5429.7 ng·g–1, 2047.2 ng·g–1to 18051.5 ng·g–1, 4.5 ng·g–1to 11.7 ng·g–1, 18.1 ng·g–1to 105.2 ng·g–1, and 36.3 ng·g–1to 69.6 ng·g–1, respectively. Among these five types of organic compounds, the concentration levels of PAHs and OCPs have decreased significantly in the last ten years, while those of PAEs and Es had an upward trend compared with the previous studies. BPA still remained at a moderately high level, as it was ten years ago. The risks of the PAEs in all of the sample sites, and fluoranthene, benzo[a]anthrene, and benzo[a]pyrene in the Wenyu River sediment, were relatively high. These results supplemented the database of toxic organics’ concentration levels in the sediments of Beijing rivers.