长三角全氟辛烷磺酸及前体物的迁移归趋模拟  

Simulation of Transport Fate of PFOS and Precursors in the Yangtze River Delta

作　　者：唐财俊 赵祯 钟昊斌 孟祥周[3] 韩宝苍 张博暄 刘劲松 TANG Caijun;ZHAO Zhen;ZHONG Haobin;MENG Xiangzhou;HAN Baocang;ZHANG Boxuan;LIU Jinsong(College of Oceanography and Ecological Science,Shanghai Ocean University,Shanghai 201306,China;College of Advanced Materials Engineering,Jiaxing Nanhu University,Jiaxing 314001,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]上海海洋大学海洋科学与生态环境学院,上海201306 [2]嘉兴南湖学院新材料工程学院,浙江嘉兴314001 [3]同济大学环境科学与工程学院,上海200092

出　　处：《环境科学与技术》2024年第5期188-199,共12页Environmental Science & Technology

基　　金：国家自然科学基金项目(41977310);嘉兴市公益性研究计划项目(2021AY10044)。

摘　　要：全氟辛烷磺酸(PFOS)作为一种新污染物备受关注。文章利用CoZMo-POP 2逸度模型分析了1988-2022年长三角区域PFOS和其前体物(PreFOS)(N-乙基全氟辛基磺酰胺(N-EtFOSA)、N-甲基全氟辛基磺酰胺(N-MeFOSA)、N-乙基全氟辛基磺酰胺乙醇(N-EtFOSE)和N-甲基全氟辛基磺酰胺乙醇(N-MeFOSE))的环境行为。结果显示:1988-2022年研究区域PFOS、N-EtFOSA、N-MeFOSA、N-EtFOSE和N-MeFOSE的累计排放量分别约为26、2.5、0.16、7.8和5.9t。PFOS在土壤、淡水和沉积物中的模拟浓度与实测浓度残差在1个对数单位内,验证了模型的可靠性。敏感性分析表明:温度和分配系数是影响污染物浓度的关键参数。当环境系统达到平衡时,近海水体是PFOS主要的汇,占PFOS环境总量的79%;从淡水到河口到近海水体的迁移是PFOS在环境中的主要迁移过程,占PFOS总迁移量的53%;流向外部是PFOS最主要的输出途径。土壤是N-EtFOSA、N-MeFOSA、N-EtFOSE和N-MeFOSE最主要的储存库,各目标污染物分别约占其环境总量的99%、98%、91%和97%;降解反应是N-EtFOSA、N-MeFOSA、N-EtFOSE和N-MeFOSE的主要输出途径。该文探讨并明确了长江三角洲PFOS和PreFOS的迁移归趋,可为长三角的生态风险评价和污染控制提供一定的科学依据。Perfluorooctane sulfonate acid(PFOS)is of great concern as a new contaminant.In this study,CoZMo-POP 2 fugacity model was used to simulate and calculate emission,fate distribution,and transfer processes of PFOS,N-EtFOSA,N-MeFOSA,N-EtFOSE and N-MeFOSE in Yangtze River Delta during 1988-2022.The results showed that cumulative emissions of PFOS,N-EtFOSA,N-MeFOSA,N-EtFOSE and N-MeFOSE in the study area were about 26 t,2.5 t,0.16 t,7.8 t and 5.9 t,respectively.The model reliability was verified by fact that residuals of modeled and measured concentrations of PFOS in soil,freshwater,and sediment were within 1 log unit.According to the result of sensitivity analysis,temperature and partitioning coefficients were key parameters affecting pollutant concentrations.When environmental system reached equilibri-um,the largest sink of PFOS was coastal water,accounting for approximately 79% of total amount remaining in the system.The transfer from fresh water to estuarine water and estuarine water to coastal water were the main PFOS transfer routes between media,accounting for 53%of total transfer.Flow to the outside is most important output pathway for PFOS.The largest sink of N-EtFOSA,N-MeFOSA,N-EtFOSE and N-MeFOSE were soil,accounting for approximately 99%,98%,91% and 97%of total amount remaining in the system,respectively.Degradation was the main output pathway for N-EtFOSA,N-MeFOSA,N-EtFOSE and N-MeFOSE.This study simulated the transfer and fate of PFOS and PreFOS in the environmen-tal multimedia of Yangtze River Delta,which could provide a scientific basis for its pollution control and ecological risk assessment.

关 键 词：全氟辛烷磺酸 长江三角洲 逸度模型 迁移归趋 

分 类 号：X131[环境科学与工程—环境科学]