Characterizing ecological risk for polycyclic aromatic hydrocarbons in water from Lake Taihu, China
Characterizing ecological risk for polycyclic aromatic hydrocarbons in water from Lake Taihu, China
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DOI：
10.1007/s10661-011-2460-5
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发表时间：
2012-11
影响因子：
3
通讯作者：
Guanghui Guo;Fengchang Wu;Hongping He;Ruiqing Zhang;C. Feng;Huixian Li;Ming Chang
中科院分区：
文献类型：
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作者：
Guanghui Guo;Fengchang Wu;Hongping He;Ruiqing Zhang;C. Feng;Huixian Li;Ming Chang
太湖为人类提供了重要的生态服务，其生态和环境状况备受关注。采用基于Monte Carlo模拟的风险商概率分布，对8种多环芳烃（PAHs）的生态风险进行了评价。结果表明，各危害因子的第95百分位数在0.00074 ~ 2.831之间，其中Flua的生态风险最高，其次为B[a]P > Pyr > Ant > Phe > Flu > Ace > Ch。Flua、B[a]P、Pyr和Ant的危害因子超过0.3的概率分别为18.09%、6.51%、3.76%和2.85%，表明它们对水生生物具有潜在的生态风险。利用地理信息系统（GIS）分析了4种具有潜在生态风险的PAHs的空间分布特征，结果表明，太湖水体中4种PAHs的空间分布特征相似。4种PAHs对水生生物的生态风险最高的是梅梁湾，其次是贡湖湾和胥口湾。并对生态风险评价中的不确定性进行了讨论。
Lake Taihu provides vital ecological services for humans in China; it receives a great deal of attention regarding its ecological and environmental conditions. In this study, the ecological risks of eight individual polycyclic aromatic hydrocarbons (PAHs) in water were assessed using probabilistic distributions of the hazard quotient based on Monte Carlo simulation. The results show that the 95th percentile of the hazard quotients ranged from 0.00074 to 2.831, and the ecological risk of Flua was highest, followed by, in descending order of risk, B[a]P > Pyr > Ant > Phe > Flu > Ace > Chr. The probabilities of hazard quotients exceeding a decision criteria of 0.3 were 18.09%, 6.51%, 3.76%, and 2.85% for Flua, B[a]P, Pyr, and Ant, respectively, indicating their potential ecological risks to aquatic organisms. The spatial distribution of hazard quotients for these four individual PAHs with potential ecological risk were obtained using Geographic Information System (GIS), and similar spatial distribution patterns were also observed in the lake. The highest ecological risks of these four individual PAHs to aquatic organisms were found in Meiliang Bay, followed by Gonghu Bay and Xukou Bay. The uncertainty within the ecological risk assessment was also discussed.