Occurrence of methylsiloxanes in sediments from a subtropical river-lake system in eastern China and its implication for ecological risks

Ecotoxicology and Environmental Safety

Shuai Su¹  Yang Lyu²  Zhenwu Tang³  Ying He³ 

[1] College of Life and Environmental Sciences, Minzu University of China, Beijing 100081, China;College of Environmental Science and Engineering, North China Electric Power University, Beijing 102206, China;Key Laboratory of Ecology and Environment in Minority Areas (Minzu University of China), National Ethnic Affairs Commission, Beijing 100081, China;

关键词: Methylsiloxanes;    River-lake system;    Sediments;    Distribution;    Risks;   

DOI  :  

来源: DOAJ

【 摘 要 】

Distribution of methylsiloxanes in environment is still far from being well studied. Little is known about the concentrations and associated risks of these chemicals in river-lake systems. This study investigated the occurrence of twelve methylsiloxanes (D4–D6, L5–L13) in the sediments from Lake Chaohu and its inflowing rivers, China, and found the total concentrations (ng/g dry weight) were in the range of 47.1–496 and 239–3593, respectively. Linear congeners were dominant, representing a median of 62.8% and 58.7% of the total concentrations found in the lake and its inflowing rivers, respectively. In general, the concentrations of sediment methylsiloxanes in the investigated river-lake system were low to moderate, compared with the results reported previously in other waters. Source assessment indicated that the emissions from industrial activities and the use of silicone-containing products were the main contributors of sediment methylsiloxanes in the investigated waters. D4 and D5 in 18.5% and 11.1% of river sediment samples might pose ecological risks to fish. The risks from the linear congeners in sediments in the area were not estimated due to no related benchmarks available. More studies are needed to investigate the occurrence of these chemicals and associated risks in aquatic environment.

【 授权许可】

Unknown