中国海洋大学学报（自然科学版）2026，Vol.56Issue(6)：78-92,15.DOI:10.16441/j.cnki.hdxb.20250121
中国东部及渤、黄、东海大气全氟辛酸沉降通量研究
Study on Atmospheric Deposition Fluxes of Perfluorooctanoic Acid over Eastern China and the Bohai,Yellow,and East China Seas
摘要
Abstract
In view of the current situation where Perfluorooctanoic acid(PFOA)affects the marine en-vironment through atmospheric transport.In this study,based on the improved three-dimensional at-mospheric chemical transport model—the community multiscale air quality model-per/polyfluoroalkyl substances(CMAQ-PFAS)module.Based on the newly established inventories of industrial source at-mospheric PFOA emissions in China for January,April,July and October,2019,the spatial and tempo-ral characteristics of the dry/wet deposition fluxes of atmospheric PFOA in eastern China and the contri-bution of atmospheric PFOA input from the Bohai,Yellow,and East China Seas were systematically investigated.The results show that the annual mean dry deposition flux of total PFOA in the eastern Chinese mainland in 2019(1.20 ng·m-2·d-1)is significantly higher than that in the Bohai,Yellow,and East China Seas(0.31 ng·m-2·d-1),with the share of the particulate state reaching 92.5%(1.11 ng·m-2·d-1).Dry deposition fluxes showed seasonal differences of high winter and low summer,with winter(2.38 ng·m-2·d-1)being 4.5 times higher than summer(0.53 ng·m-2·d-1)in the land region,and winter being 6.9 times higher than summer in the Bohai,Yellow,and East China Seas.The annual mean wet deposition flux of total PFOA in eastern mainland China in 2019 was about 0.40 ng·m-2·d-1,with the particulate and gaseous components contributing 20.0%(0.08 ng·m-2·d-1)and 80.0%(0.32 ng·m-2·d-1).The PFOA wet deposition fluxes in the eastern mainland of China showed summer(0.76 ng·m-2·d-1)>winter(0.67 ng·m-2·d-1)>spring(0.20 ng·m-2·d-1)>significant gradient in fall(0.12 ng·m-2·d-1).The contribution of atmospheric deposition to the PFOA concentration in surface seawater(<30 cm)was characterized by a spatial gradient:in winter,the contributions of the Bohai Sea,Yellow Sea,and East China Sea were 2.3%,1.5%,and 9.3%,respectively,while in summer they decreased to 0.8%,0.3%,and 1.3%.Due to the lowest back-ground concentration of PFOA in seawater,the East China Sea has the highest average contribution rate of atmospheric deposition(5.3%).In contrast,the background concentration of PFOA in the Yellow Sea seawater is relatively high,thus the average contribution rate of atmospheric deposition is the lowest(1.4%).This study reveals that atmospheric deposition,as a pathway for PFOA to enter the Bohai Sea,the Yellow Sea,and the East China Seas,has significant spatial and temporal differences in its con-tribution rate,which provides a scientific basis for assessing the risk of PFOA to the marine environ-ment.关键词
全氟辛酸/大气排放清单/社区多尺度空气质量模型-全氟和多氟烷基化合物模块/渤海/黄海/东海/沉降通量/空间分布Key words
perfluorooctanoic acid/atmospheric emission inventory/community multiscale air quality model-per/polyfluoroalkyl substances module/Bohai Sea/the Yellow Sea/East China Sea/deposition flux/spatial distribution分类
资源环境引用本文复制引用
李芬香,刘晓环,刘震泽,张月,刘兰莹..中国东部及渤、黄、东海大气全氟辛酸沉降通量研究[J].中国海洋大学学报（自然科学版）,2026,56(6):78-92,15.基金项目
国家自然科学基金面上项目(42175129)资助Supported by the General Program of the National Natural Science Foundation of China(42175129) （42175129）
