Long-term effects of chromium from red mud (bauxite residue) ocean dumping on the benthic environment in South Korea
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Title
- Long-term effects of chromium from red mud (bauxite residue) ocean dumping on the benthic environment in South Korea
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Author(s)
- Kim, Chang Joon; Chung, Chang Soo; Jung, Jun Mo; Kim, Young-Ryun; Kang, Dong-Won; Kim, Hye Eun; Shin, Kyung-Hoon; Choi, Ki Young
- KIOST Author(s)
- Kim, Chang Joon(김창준); Jung, Jun Mo(정준모); Kim, Hye Eun(김혜은); Choi, Ki Young(최기영)
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Alternative Author(s)
- 김창준; 정창수; 정준모; 김혜은; 최기영
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Publication Year
- 2023-11
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Abstract
- Between 1999 and 2009, 344,000 m3 of red mud was released into the red mud dumping zone in the East Sea-Byeong ocean dumping site in South Korea. This study aimed to assess the impacts before and after the 2010 red mud dumping ban. We quantified total Cr concentrations by depth from core sediment samples at the red mud dumping station and evaluated benthic communities in 2004, 2009, 2012, 2017, and 2019. At the dumping station DB-085, the Cr content in the upper layer (0–10 cm) exceeded the effect range median criteria in all study years and decreased with time. Geochemical fraction studies using sequential extraction methods from core sediment samples in 2004, 2009, and 2017 showed high ratios of non-residual fractions (anthropogenic inputs), indicating persistent potential long-term risk after the 2010 ban. Additionally, we confirmed that Thyasira tokunagai, an opportunistic and contamination-stress-resistant species, dominated the study station.
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ISSN
- 0025-326X
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/44681
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DOI
- 10.1016/j.marpolbul.2023.115584
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Bibliographic Citation
- Marine Pollution Bulletin, v.196, 2023
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Publisher
- Pergamon Press Ltd.
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Keywords
- Ocean dumping; Red mud; Chromium; Sequential extraction; Benthic community
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Type
- Article
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Language
- English
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Document Type
- Article
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