Distribution characteristics, sources, and risk assessment of organochlorine pesticides in the Fildes Peninsula and Adelaide Island. (December 2022)

• Record Type: Journal Article
• Authors: Zheng, Yunchao; Han, Bin; Xu, Xiuli; Zheng, Li
• Is Part Of: Marine pollution bulletin. Volume 185:Part A(2022)
• Publication Date: 2022-12
• Subjects: Organochlorine pesticides -- Fildes Peninsula -- Adelaide Island -- Distribution characteristics -- Source -- Risk assessment; Marine pollution -- Periodicals; Marine Biology -- Periodicals; Water Pollution -- Periodicals; Mer -- Pollution -- Périodiques; Publications périodiques; Pollution des mers; Lutte antipollution; Electronic journals; 363.7394
• DOI: 10.1016/j.marpolbul.2022.114284
• Languages: English
• ISSNs: 0025-326X

Abstract

Abstract: This work analyzed the distribution characteristics, sources, and corresponding environmental risks of 10 organochlorine pollutants (OCPs) in soil samples from 13 stations on the Fildes Peninsula and Adelaide Island in Antarctica in 2020. Results showed that the total amount of OCP residues in the study area ranged from N.D. to 2.66 ng·g −1 with an average concentration of 0.90 ng·g −1 . Six organochlorine pesticides were detected, and the residue level of DDTs was slightly lower than that of HCHs. The residues of HCHs were mainly γ-HCH and those of DDTs were mainly O, P′-DDT. Source analysis revealed that the residues mainly originated from atmospheric transport and human activities. Environmental risk analysis showed that in the study area, the residues of HCHs and DDTs were present at low levels, and their ecological risk was low. Highlights: Six OCPs were detected in the topsoil of Fildes Peninsula and Ardley Island. The OCPs mainly originated from atmospheric transport and human activities. OCPs in this region were at low ecological risk.