生态环境学报2025，Vol.34Issue(7)：1020-1028,9.DOI:10.16258/j.cnki.1674-5906.2025.07.003
钦州湾全氟/多氟烷基化合物的污染特征及生态风险评估
Pollution Characteristics and Ecological Risk Assessment of Per-and Poly-fluoroalkyl Substances(PFAS)in Qinzhou Bay
摘要
Abstract
Qinzhou Bay,situated at the northern extremity of the Beibu Gulf,encompasses the Maowei Sea to the north and the outer bay to the south.It is a typical subtropical estuarine bay characterized by distinct marine ecosystems,such as mangroves,salt marshes,seagrass,and oyster reefs.Per-and polyfluoroalkyl substances(PFAS)are emerging contaminants that are toxic to ecosystems and persist in their environment.This study aimed to understand the pollution status of PFAS in this region and their ecological risks to marine ecosystems.36 PFAS were detected and analyzed in the surface and bottom seawater samples,and the ecological risk assessment of perfluorooctanoic acid(PFOA)and perfluorooctane sulfonic acid(PFOS)was performed using the risk quotient(RQ)method.The results showed that the total concentration of PFAS(∑PFAS)ranged from 4.57 to 13.55 ng·L-1,which was at a medium to low levels among coastal bays in China.Hexafluoropropylene oxide dimer acid(HFPO-DA),2-[2-(trifluoromethoxy)hexafluoropropoxy]tetrafluoropropanoic acid(HFPO-TA(C7)),and perfluorobutanoic acid(PFBA)are the three dominant pollutants.The spatial distribution findings suggested that the ∑PFAS in the surface seawater of the Maowei Sea exhibited a decreasing trend from the western region towards the eastern coastal area.Conversely,∑PFAS in the bottom seawater showed an opposite trend.In the outer bay,the ∑PFAS in the surface seawater decreased from the northeastern coast near Sanniang Bay to the southwest,whereas the concentration in the southeastern region of the bottom seawater remained relatively low.Spearman correlation analysis suggested that perfluoro-2-methoxyacetic acid(PFMOAA)and perfluoro(3,5,7-trioxaoctanoic)acid(PFO3OA)in the surface seawater may originated from a common source.Furthermore,the ecological risk assessment revealed that the mean RQ values of PFOS and PFOA were far below the threshold of 0.1,indicating low risk to the marine ecosystem of Qinzhou Bay.Considering the high levels and deficiency of ecotoxicological data for HFPO-DA and HFPO-TA(C7),it is necessary to investigate the environmental behaviors and ecotoxicological effects of these emerging PFAS.关键词
全氟/多氟烷基化合物/六氟环氧丙烷二聚体/亚热带海湾/分布特征/生态风险评估Key words
PFAS/HFPO-DA/subtropical bay/distribution characteristics/ecological risk assessment分类
资源环境引用本文复制引用
田蜜,廖日权,张健,董凤凤,唐建辉..钦州湾全氟/多氟烷基化合物的污染特征及生态风险评估[J].生态环境学报,2025,34(7):1020-1028,9.基金项目
国家自然科学基金区域(山东)创新发展联合基金(U22A20607) （山东）
