Ocean current redistributed the currently using Organoamine Pesticides in Arctic summer water

• Published in: The Science of the total environment Vol. 886; p. 163979
• Main Authors: Ding, Yunhao, Zheng, Hongyuan, Chen, Zhiyi, Gao, Yuan, Xiao, Kaiyan, Gao, Zhiwei, Han, Zheyi, Xue, Yingang, Cai, Minghong
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 15-08-2023
• Subjects: Arctic Ocean; Arctic Regions; Currently using Organoamine Pesticides; Ecological risk; Environmental Monitoring; Oceans and Seas; Pesticides - analysis; Seawater; Surface Ocean current redistribution; Water - analysis; Water Pollutants, Chemical - analysis; Arctic Regions; Arctic Ocean; Ecological risk; Currently using Organoamine Pesticides; Surface Ocean current redistribution
• ISSN: 0048-9697; 1879-1026
• DOI: 10.1016/j.scitotenv.2023.163979

In a comprehensive study on the presence and distribution of Currently Using Organoamine Pesticides (CUOAPs) in the Arctic Ocean, this study collected and analyzed 36 surface seawater samples during the summer of 2021. The study detected 36 CUOAPs, 17 of these compounds at levels exceeding the Method Detection Limits (MDLs). Concentrations of CUOAPs ranged from 0.11 to 2.94 ng/L, exhibiting an average of 1.83 ± 0.83 ng/L. Spatial distribution analysis revealed lower CUOAP concentrations in the central Arctic Ocean, with Cycloate constituting the most abundant component (23.66 %). The investigation identified terrestrial inputs and long-range atmospheric transport as potential sources of CUOAPs in the Arctic Ocean region. The origins of individual CUOAPs appeared to be associated with application procedures and their propensity for co-occurrence at low latitudes. The study also examined the role of ocean currents in the transport and redistribution of CUOAPs in surface seawater across different regions. While ocean currents played a significant role, the influence of sea ice cover on CUOAP distribution was minimal. An ecological risk assessment analysis underscored the need for regional attention to the presence of CUOAPs in the Arctic Ocean.
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•Currently Using Organoamine Pesticides were detected in the surface seawater of the Arctic Ocean.•The observed geospatial distribution patterns were redistributed by the surface ocean current.•Potential source and ecological risk assessment should be a concern in the central Arctic Ocean.