应用物种敏感性分布评估三氯卡班对我国淡水环境的生态风险

doi:10.11934/j.issn.1673-4831.2017.10.008

摘要/Abstract

摘要：

应用物种敏感性分布（species sensitivity distribution，SSD）方法构建了三氯卡班（triclocarban，TCC）对淡水生物的SSD曲线，计算了TCC对淡水生物的5%急性危害浓度（HC₅）。采用对数正态（log-normal）分布模型得到的急性ρ（HC₅）=3.85 μg·L^-1，在评估因子（AF）取值为3、急慢性毒性比（ACR）为39.3的基础上，计算了TCC的慢性预测无效应浓度（PNEC）为32.7 ng·L^-1。采用商值法对21个有数据报道的典型地表水调查点水体中TCC的生态风险进行评估，结果表明，TCC高风险比例为28.6%，中风险比例为47.6%，低风险比例为23.8%。TCC对我国地表水的影响应该引起关注。

关键词: 三氯卡班, 风险商, 物种敏感性分布, 地表水

Abstract:

The species sensitivity distributions (SSD) method was used to plot SSD curves of triclocarban (TCC) to freshwater organisms, and acute hazardous concentration for 5% of the species (HC₅) of TCC was calculated. The log-normal distribution model was used to work out acute ρ(HC₅)=3.85 μg·L^-1, and based on AF=3 and acute to chronic ratios=39.3, chronic PNEC was worked out to be 32.7 ng·L^-1. Risk quotient method was used in assessing ecological risk of triclocarban in 21 typical reported survey points of surface water, and the results of the assessment showed that the percentage for high risk, medium risk and low risk of TCC were 28.6%, 47.6% and 23.8%. The ecological risk of TCC for surface water in China deserve more attention.

Key words: triclocarban, risk quotient, species sensitivity distributions (SSD), surface water

中图分类号:

X826

汪贞, 杨先海, 范德玲, 郭敏, 刘济宁, 石利利. 应用物种敏感性分布评估三氯卡班对我国淡水环境的生态风险[J]. 生态与农村环境学报, 2017, 33(10): 921-927.

WANG Zhen, YANG Xian-hai, FAN De-ling, GUO Min, LIU Ji-ning, SHI Li-li. Ecological Risk Assessment of Triclocarban in Fresh Water of China by Species Sensitivity Distribution[J]. Journal of Ecology and Rural Environment, 2017, 33(10): 921-927.

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