Exposure, spatial distribution, and health risks of perfluoroalkyl acids in commercial fish species in the Beibu Gulf.

The global distribution, persistence, bioaccumulation, and toxicity of per- and polyfluoroalkyl substances (PFAS) have received significant attention. We determined the contents of major perfluoroalkyl acids (PFAAs) in various commercial fish species from different regions of the Beibu Gulf. We detected 14 out of 17 PFAAs across all species, with PFOS (Perfluorooctanesulphonate) showing the highest detection rate, followed by PFHxS (Perfluorohexanesulfonic acid), PFPeA (Perfluorovaleric acid), and PFTrDA (Perfluorotetradecanoic acid).

Methylmercury in commercial fish species from the Erhai Lake Basin, Southwest China: concentrations, health risk assessment, and implications for future monitoring.

Erhai Lake, a highland lake situated in Southwest China, provides critical aquatic protein sources for the local community, and its preservation is vital due to the sensitivity of alpine freshwater ecosystems to disturbance. However, there is a lack of research on the contamination status of methylmercury (MeHg) in aquatic organisms of the Erhai Lake Basin. MeHg concentrations in important commercial fish species from the Erhai Lake were examined, and the potential health risks associated with human consumption were assessed.

Distribution, trophic magnification and risk of trace metals and perfluoroalkyl acids in marine organisms from Haizhou Bay.

Haizhou Bay, a semi-enclosed key aquaculture area in East China, has had relatively limited research focused on trace metals and perfluoroalkyl acids (PFAAs) in its biota. This study characterized the distribution, biomagnification and health risks of selected trace metals and PFAAs in various marine organisms from Haizhou Bay. Among the species examined, zinc (Zn) was the most prevalent metal, followed by copper (Cu) and chromium (Cr), whereas cadmium (Cd), total mercury (THg), and methylmercury (MeHg) contents were relatively low.

Variability in methylmercury exposure across migratory terrestrial bird species: Influencing factors, biomagnification and potential risks.

Despite China's considerable mercury (Hg) emissions, monitoring of methylmercury (MeHg) levels in its terrestrial environments remains limited. This study examined the occurrence and accumulation of MeHg in body feathers of 12 migratory terrestrial bird species originating from Siberia and northeastern China. Considerable variations in foraging habits and MeHg levels were observed among these species.