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Indexed by:期刊论文

Date of Publication:2018-02-01

Journal:MARINE POLLUTION BULLETIN

Included Journals:PubMed、SCIE、EI

Volume:127

Page Number:285-288

ISSN No.:0025-326X

Key Words:Perfluoroalkyl substances (PFASs); Contamination; Sediment; Sediment core; Dalian Bay

Abstract:In the present study, the spatial distributions and vertical variations of PFASs in the sediments of the Dalian Bay were investigated. The total concentrations of PFASs (Sigma PFASs) in surface sediments of Dalian Bay ranged from 1.49 to 2.66 ng g(-1) dw. The predominant PFASs in surface sediments were PFOA, PFBS and PFBA with the concentration ranges of 0.50 to 0.95, 0.21 to 0.94, and 0.035 to 0.32 ng g(-1) dw, respectively. For the two sediment cores, Sigma PFASs ranged from 1.20 to 2.00 and from 1.37 to 2.06 ng g(-1) dw, respectively. There was a maximum Sigma PFASs concentration value near the surface. In general, Sigma PFASs gradually decreased with increasing sampling depth after reaching the maximum. PFOA, PFBS and PFBA were also the predominant PFASs in the two sediment cores. It is recommended that the monitoring and risk assessment of short-chain PFAS should be taken into consideration, and further researches are needed to understand the transportation and fate of these chemicals in the aquatic environment.