物种敏感度分布法推导全氟辛酸和全氟辛烷磺酸水质生态风险阈值  

Ecological toxicity thresholds of perfluorooctanoic acid and perfluorooctane sulfonate for water quality derived by species sensitivity distribution

作　　者：王晨羽 潘奕陶 戴家银 WANG Chenyu;PAN Yitao;DAI Jiayin(School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学环境科学与工程学院,上海200240

出　　处：《海洋环境科学》2024年第6期945-953,962,共10页Marine Environmental Science

基　　金：国家重点研发计划项目(2022YFC3105700)。

摘　　要：我国尚无针对全氟及多氟烷基化合物(per-and polyfluoroalkyl substances,PFAS)的生态环境基准。本研究搜集了代表性化合物全氟辛烷磺酸(perfluorooctane sulfonate,PFOS)和全氟辛酸(perfluorooctanoic acid,PFOA)的水生急慢性毒性数据,基于物种敏感度分布(species sensitivity distribution,SSD)法推导海水和淡水生态风险阈值。其中,PFOA和PFOS的海水长期风险阈值分别为0.425μg/L和3.472μg/L,淡水阈值分别为13.43μg/L和1.822μg/L,暗示PFOA对海洋物种的毒性高于淡水物种,而相比于海洋物种,隆线溞(Daphnia carinata)等淡水物种可能对PFOS更为敏感。基于推导阈值对我国主要近岸海域进行风险评价,结果表明,渤海莱州湾存在PFOA潜在中风险区域,PFOS在我国海域无明显生态风险。研究结果可为PFAS水质基准制定和污染控制决策提供依据和参考。Water quality criteria for per-and polyfluoroalkyl substances(PFAS)are still lacking in China.This study collected acute and chronic aquatic toxicity data for perfluorooctane sulfonate(PFOS)and perfluorooctanoic acid(PFOA)and derived ecological thresholds for seawater and freshwater using species sensitivity distribution(SSD)method.The long-term thresholds for PFOA and PFOS were determined to be 0.425μg/L and 3.472μg/L in seawater,respectively,and 13.43μg/L and 1.822μg/L in freshwater,respectively.This suggests that PFOA is more toxic to marine species,while compared to marine species,freshwater species like water flea(Daphnia carinata)may be more sensitive to PFOS.Risk assessment based on the derived thresholds indicated moderate potential risk for PFOA in Laizhou Bay,Bohai,while no obvious ecological risk was found for PFOS in major coastal waters of China.These findings may support the development of PFAS water quality criteria and the establishment of relevant pollution control regulations.

关 键 词：PFOA PFOS 物种敏感度分布法 生态风险评价 

分 类 号：X171.5[环境科学与工程—环境科学] X820.4