Research Progress in Ecotoxicology of PFOS and Its Novel Alternative OBS.

Perfluorooctane sulfonate (PFOS) belongs to perfluorinated and polyfluoroalkyl compounds (PFASs), and is a persistent organic pollutant that has been banned worldwide. As a substitute for PFOS, sodium p-perfluorinated noneoxybenzenesulfonate (OBS) has been widely produced and used in China, and has been detected in various environment media and human body. This article conducts a review of existing research on PFOS and OBS, summarizing their environmental behavior, population exposure, and toxic effects. It is recommended that although the bioaccumulation of OBS is weaker than that of PFOS, the biological toxicity of OBS still deserves attention. This article also discusses the limitations of this review and provides prospects for future research directions. [ABSTRACT FROM AUTHOR]