Ecological risks of polycyclic aromatic hydrocarbons found in coastal sediments along the northern shores of the Bohai Sea (China)
Ecological risks of polycyclic aromatic hydrocarbons found in coastal sediments along the northern shores of the Bohai Sea (China)
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DOI：
10.1080/02757540.2013.877003
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发表时间：
2014-08-01
影响因子：
2.5
通讯作者：
He, Yue
中科院分区：
文献类型：
--
作者：
Jiao, Wentao;Wang, Tieyu;He, Yue
在中国渤海和黄海北方沿岸沿着和河口沉积物中发现的16种美国环境保护署（US EPA）列出的多环芳烃（PAHs）的总浓度在任何研究地点的0.236至8.34 nM g（-1）干重（dw）之间。对于一个给定的多环芳烃，浓度变化一到两个数量级。基于生物群-沉积物累积因子（BSAFs）的生态风险评价结果表明，沉积物中多环芳烃的潜在生态危害有限。沉积物中多环芳烃的平均总浓度均低于低影响范围，表明目前沉积物中存在的多环芳烃对水生生物无害。水生生物体内的PAH浓度估计为0.223 nM g（-1），通过从沉积物到海洋收获物的生物浓缩对人类健康构成有限威胁。假设没有额外的多环芳烃输入，99%的16个多环芳烃分子目前存在于沉积物中将在40年内降解。
The total concentrations of 16 United States Environmental Protection Agency (US EPA)-listed polycyclic aromatic hydrocarbons (PAHs) found in coastal and estuarine sediments along the northern shores of the Bohai and Yellow Seas, China, at any study location varied from 0.236 to 8.34 nM g(-1) dry weight (dw). For a given PAH, concentrations varied by one to two orders of magnitude. Ecological risk assessments based on biota-sediment accumulation factors (BSAFs) indicated that the potential ecological hazard of PAHs in the sediments was limited. The average total sediment PAH concentrations were less than the effects range low, indicating that PAHs currently present in the sediments were not harmful to aquatic organisms. The estimated PAH concentration in the aquatic organisms was 0.223 nM g(-1) and posed a limited threat to human health via biological concentration from sediment to harvest of the sea. Assuming no additional PAH inputs, 99% of the 16 PAH molecules currently present in the sediments would be degraded in 40 years.