全氟辛酸物种敏感性分布平均模型及生态风险评估  

Model-averaging species sensitivity distributions of perfluorooctanoic acid and its ecological risk assessment

作　　者：管硕 金中武[1] 丁兵[1] 顾延生 刘小光 GUAN Shuo;JIN Zhong-wu;DING Bing;GU Yan-sheng;LIU Xiao-guang(Key Laboratory of River and Lake Regulation and Flood Control in the Middle and Lower Reaches of the Yangtze River of Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010,China;State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]长江水利委员会长江科学院,水利部长江中下游河湖治理与防洪重点实验室,湖北武汉430010 [2]中国地质大学(武汉)生物地质与环境地质国家重点实验室,湖北武汉430074

出　　处：《中国环境科学》2024年第12期6984-6992,共9页China Environmental Science

基　　金：中央级公益性科研院所基本科研业务费专项资金资助项目(CKSF2024326/HL);国家重点研发计划项目(2023YFC3209500)。

摘　　要：收集并筛选了30个水生物种及其相关的53个单一毒性数据,基于不同的毒性终点数据,构建了全氟辛酸(PFOA)的优化物种敏感性分布(SSD)模型.为了降低模型选择的不确定性,采用了模型平均法,并将其应用于生态风险评价.根据致死、生长抑制、繁殖毒性及生化毒性数据,推导得出的预测无效应浓度(PNEC)值分别为2.09,0.02,0.006和0.024mg/L.值得注意的是,在PFOA暴露下,水生物种的繁殖终点表现出最高的敏感性,因此,选取基于繁殖毒性终点的PNEC值作为PFOA的水生生物标准(ALC).此外,还收集了长江流域地表水中的PFOA暴露浓度数据,并运用危害商值法(HQ)对长江流域地表水的生态风险进行了评估.研究结果显示,在所考察的12个长江流域站点地表水中,所有地表水样品的HQ值均在0.0004~0.04之间,表明长江流域中PFOA的生态风险处于低水平状态.本文的研究结果将为中国水生生物保护和降低PFOA生态风险提供重要参考.In this study,30 aquatic species and their associated 53 single toxicity data were collected and screened.Based on different toxicity endpoint data,an Species Sensitivity Distribution(SSD)model for perfluorooctanoic acid(PFOA)was created.In order to reduce the uncertainty introduced by model selection,the model-averaging method was employed and applied to ecological risk assessment.According to the data on lethality,growth inhibition,reproductive toxicity,and biochemical toxicity,the derived Predicted No-Effect Concentration(PNEC)values were 2.09,0.02,0.006,and 0.024mg/L,respectively.It is noteworthy that under PFOA exposure,the reproductive endpoint of aquatic species exhibited the highest sensitivity.Therefore,the PNEC value based on the reproductive toxicity endpoint was selected as the Aquatic Life Criteria(ALC)for PFOA.Furthermore,PFOA exposure concentration data in surface water from the Yangtze River basin were collected,and the ecological risk of surface water in the Yangtze River basin was assessed using the Hazard Quotients(HQ)method.The research results indicate that among the 12sampling sites in the Yangtze River basin,the HQ values of all surface water samples range from 0.0004 to 0.04,suggesting that the ecological risk of PFOA in the Yangtze River basin is low.The findings of this study provide important references for aquatic bioprotection and mitigating the ecological risks of PFOA in China.

关 键 词：全氟辛酸 模型平均法 生态风险评价 长江流域 

分 类 号：X522[环境科学与工程—环境工程]