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Evaluation for Contents of Contaminants and Leaching Characteristics of Bottom Ash  

Koh, Taehoon (한국철도기술연구원 신소재틸팅열차시스템연구단)
Lee, Sungjin (한국철도기술연구원 철도구조연구실)
Shin, Minho (한국철도기술연구원 철도구조연구실)
Kim, Byongsuk (부경대학교 환경해양대학 환경공학과 대학원)
Lee, Jeakeun (부경대학교 환경해양대학 환경공학과)
Lee, Taeyoon (부경대학교 환경해양대학 환경공학과)
Publication Information
Journal of the Korean GEO-environmental Society / v.11, no.6, 2010 , pp. 77-83 More about this Journal
Abstract
In this study, we tried to determine any detrimental effects on water quality when bottom ash obtained from a coal-fired power plant intended to be used as a fill material in construction sites. Physical-chemical properties of bottom ash were determined using proximate analysis, elemental analysis, XRD, and XRF. Classification of bottom ash as a waste material and soil contamination due to the use of bottom ash were performed by Korea waste standard leaching test and soil toxicity test, respectively. Results of leaching tests were compared to the regulations for water quality and groundwater quality and no harmful effects on water quality were found. Most of heavy metals in leachate were below detection limits but trace amount of $Cr^{6+}$ was found. However, concentration of $Cr^{6+}$ was below the regulation criteria. Column leaching tests indicated that concentrations of Pb and Zn were slightly higher than regulations but below regulations within 1 PVE, but concentrations of sulfate were 10 times higher than regulation and thus, the required time to reach regulation was almost 8 PVE.
Keywords
Bottom ash; Heavy metals; Anions; Korea waste standard leaching test; Korea soil toxicity test; Pore volume of effluent (PVE);
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