Remediation of sediments contaminated by harmful heavy metals using aluminum sulfate: Sustainable approach for practical applications
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Title
- Remediation of sediments contaminated by harmful heavy metals using aluminum sulfate: Sustainable approach for practical applications
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Author(s)
- Lee, Gaeun; Kim, Kyoung Rean
- KIOST Author(s)
- Lee, Gaeun(이가은); Kim, Kyoung Rean(김경련)
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Alternative Author(s)
- 이가은; 김경련
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Publication Year
- 2024-05
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Abstract
- Chemical washing could be suitable for the remediation of marine sediments contaminated with harmful heavy metals. Considering green and sustainable remediation (GSR), the application of aluminum sulfate (AS) is intended to reduce the costs and environmental impacts. We extracted harmful heavy metals from manganese nodules using an ion exchange mechanism that occurs when AS dissociates in water. AS in the range from 2 % to 5 % was used. The remediation efficiencies using 5 % AS were found to be the highest, at 91.8 % for Ni and ≥ 100 % for other harmful heavy metals. The Pearson's coefficient evaluation showed that increasing elapsed time did not significantly affect the extraction of harmful heavy metals. Pollutants in post-processing products may not cause secondary pollutions if solidification/stabilization and additional treatments are used. Our results can serve as fundamental data for the actual remediation processes using AS not only for deep-sea mining tailings but also contaminated marine sediments.
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ISSN
- 0025-326X
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/45501
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DOI
- 10.1016/j.marpolbul.2024.116345
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Bibliographic Citation
- Marine Pollution Bulletin, v.202, 2024
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Publisher
- Pergamon Press Ltd.
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Keywords
- Marine sediments; Manganese nodules; Harmful heavy metals; Remediation; Aluminum sulfate; Post-processing products
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Type
- Article
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Language
- English
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