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http://dx.doi.org/10.5338/KJEA.2022.41.4.27

Remediation of As-contaminated Soil Using Magnetite and Bottom Ash  

Se Jin Oh (Department of Environmental and Energy Engineering, Yonsei University)
Min Woo Kang (Department of Environmental and Energy Engineering, Yonsei University)
Jong Cheol Lee (Department of Environmental and Energy Engineering, Yonsei University)
Hun Ho Lee (Department of Environmental and Energy Engineering, Yonsei University)
Hyun-Seog Roh (Department of Environmental and Energy Engineering, Yonsei University)
Yukwon Jeon (Department of Environmental and Energy Engineering, Yonsei University)
Dong Jin Kim (Environmental Research Institute, Kangwon National University)
Sang Soo Lee (Department of Environmental and Energy Engineering, Yonsei University)
Publication Information
Korean Journal of Environmental Agriculture / v.41, no.4, 2022 , pp. 223-229 More about this Journal
Abstract
BACKGROUND: Mining activities, smelter discharges, and sludges are the major sources of heavy metal contamination to soils. The objective of this study was to determine the efficiency of magnetite and bottom ash derived from coal ash in remediating As-contaminated soil. METHODS AND RESULTS: An incubation experiment was conducted for 10 weeks. Magnetite and bottom ash at different rates and ratios were applied to each plastic bottle repacked with 1,000 g of dried As-contaminated soil. After 3-weeks of incubation, the concentrations of available As were measured by using Mehlich-3, SBET, and sequential extraction methods. All of the subjected soil amendments resulted in significant decreases in available As concentration compared to the controls. The addition of magnetite at the highest rate was the best to stabilize As in the soils; however, the values of As concentration varied with the extraction methods. CONCLUSION(S): To ensure the stabilization accuracy of heavy metals in soil, both single and sequential extractions are recommended. The magnetite derived from fly coal ash can also be applicable as a heavy metal stabilizer for the As-contaminated soil.
Keywords
Arsenic; Bioavailability; Bottom ash; Contaminated soil; Magnetite;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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