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Choi, Sung-Deuk
Environmental Analytical Chemistry Lab (EACL)
Research Interests
  • Persistent organic pollutants, Environmental Analysis and monitoring, Multimedia modeling, Fine particle

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Nationwide levels and distribution of endosulfan in air, soil, water, and sediment in South Korea

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Title
Nationwide levels and distribution of endosulfan in air, soil, water, and sediment in South Korea
Author
Kim, LeesunJeon, Jin-WooSon, Ji-YoungKim, Chul-SuYe, JinKim, Ho-JoongLee, Chang-HoHwang, Seung-ManChoi, Sung-Deuk
Issue Date
2020-10
Publisher
ELSEVIER SCI LTD
Citation
ENVIRONMENTAL POLLUTION, v.265, pp.115035
Abstract
We investigated the levels and distribution patterns of alpha- and beta-endosulfan and endosulfan sulfate in air, soil, water, and sediment samples collected from the South Korean persistent organic pollutants (POPs) monitoring networks. In the air samples, the highest concentrations of the total (Sigma(3)) endosulfan (50.3 -611 pg/m(3), mean: 274 pg/m(3)) were observed during summer. Spearman analysis revealed a good correlation between agricultural land area and atmospheric concentrations of Sigma(3) endosulfan except during winter. Regardless of the season, the ratio of the two isomers (alpha/beta) was 3.6-4.9 in the air samples, higher than that observed in technical mixtures (2.0-2.3), possibly due to the higher volatility of alpha-endosulfan, compared to beta-endosulfan. Concentrations of Sigma(3) endosulfan in the soil samples (n.d.-13.4 ng/g, mean: 0.8 ng/g) were not significantly different except at some stations adjacent to large areas of farmland. The average levels of Sigma(3) endosulfan in the water and sediment samples were 2.1 ng/L and 0.1 ng/g dw, respectively. In analyzing the four largest rivers, it was observed that a few water stations during spring and fall and sediment stations in fall had high concentrations of the two isomers and endosulfan sulfate, particularly around the Yeoungsan and Nakdong Rivers near large areas of agricultural land. Endosulfan sulfate was dominant at most water and sediment sampling stations. This study demonstrates that the endosulfan found in most environmental compartments most probably derives from agricultural areas despite its ban as a pesticide. On the other hand, given that it was also detected in industrial and urban areas, in which pesticide application does not occur, it can be conjectured that endosulfan is aerially transported at higher temperatures and continuously circulates within the environment. (C) 2020 Elsevier Ltd. All rights reserved.
URI
https://scholarworks.unist.ac.kr/handle/201301/48177
URL
https://www.sciencedirect.com/science/article/pii/S0269749120313634
DOI
10.1016/j.envpol.2020.115035
ISSN
0269-7491
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