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ORIGINAL RESEARCH article

Front. Mar. Sci.
Sec. Marine Pollution
Volume 11 - 2024 | doi: 10.3389/fmars.2024.1513515
This article is part of the Research Topic Water Resources Management and Pollution Control in Islands and Coastal Areas View all articles

Characteristics, Source Analysis, and Risk Assessment of Organochlorine Pesticide Contamination in Nearshore Surface Sediments of a Tropical Tourist Island

Provisionally accepted
Hongbing Wang Hongbing Wang *Lin Zhang Lin Zhang *Feng Yang Feng Yang *Li Yan Li Yan *Cong Lin Cong Lin *Cheng Shen Cheng Shen *
  • Haikou Marine Geological Survey Center, China Geological Survey, Haikou, China

The final, formatted version of the article will be published soon.

    Surface sediment samples were collected from the surrounding waters of the two largest tourist islands in Sanya, China, to compare and evaluate the sources, distribution, and ecological risks of 21 organochlorine pesticides. The total concentration of Organochlorine pesticides (OCPs) ranged from 1.35 to 5.0 ng/g. Dichlorodiphenyltrichloroethane(ΣDDTs) had the largest proportion among the OCPs, followed by Hexachlorocyclohexanes ( ΣHCHs ). The concentrations of HCHs and DDTs from the west side of West Island were significantly higher than those from the east side, and fine-grained sediments exhibited a stronger adsorption effect on OCPs. Source studies showed that new inputs of HCH pollutants were present in the area, while historical residues of HCHs remained high. Residual OCPs are still widely present in the environment, transported by river runoff, with a small portion coming from atmospheric deposition and ship paints. The factors that occasionally cause adverse biological effects include Heptachlor epoxide, 4,4'-DDE, ΣDDT, Dieldrin, Endrin, and γ-HCH. Stations SY03, SY04, SY06, and SY09 showed moderate levels of ecological effects, and further investigation, monitoring, and control of their sources are necessary.

    Keywords: Contamination characteristics, Tourist city, Surface sediments, Source analysis, Ecological risk

    Received: 18 Oct 2024; Accepted: 11 Dec 2024.

    Copyright: © 2024 Wang, Zhang, Yang, Yan, Lin and Shen. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    Hongbing Wang, Haikou Marine Geological Survey Center, China Geological Survey, Haikou, China
    Lin Zhang, Haikou Marine Geological Survey Center, China Geological Survey, Haikou, China
    Feng Yang, Haikou Marine Geological Survey Center, China Geological Survey, Haikou, China
    Li Yan, Haikou Marine Geological Survey Center, China Geological Survey, Haikou, China
    Cong Lin, Haikou Marine Geological Survey Center, China Geological Survey, Haikou, China
    Cheng Shen, Haikou Marine Geological Survey Center, China Geological Survey, Haikou, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.