Abstract
Per- and polyfluoroalkyl substances (PFAS) including legacy and emerging compounds have been widely detected in various environmental media and have attracted a significant amount of research and regulatory attention. Aquatic environments such as seawater are important PFAS sinks due to the strong stability and water solubility of PFAS. In this study, the occurrence, temporal variation, and source appointment of 17 legacy and 16 emerging PFAS in seven different mollusks from nine cities around the Bohai Sea, China, were investigated from 2010 to 2018. Significantly higher concentrations of legacy PFAS compared to those of emerging PFAS indicate that legacy PFAS products, including perfluorooctane sulfonic acid and perfluorooctanoic acid, are still widely used in China. However, the decreasing trend of the legacy PFAS concentrations in mollusks after 2015 indicate that these products are gradually being withdrawn from the market due to China’s implementation of the Stockholm Convention. A positive matrix factorization was used to identify six primary pollution sources including electrochemical fluorination processes, domestic sewage discharge, metal plating, food packaging, the fluorochemical industry, and the fluoropolymer industry. Among these sources, the fluoropolymer industry is the largest contributor to environmental PFAS, accounting for 68% of the total pollution in this region.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
