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자료유형
학술저널
저자정보
김진호 (한밭대학교) 주진철 (한밭대학교) 강은비 (한밭대학교) 최종수 (LH 토지주택연구원) 이정민 (LH 토지주택연구원) 김용혁 (한국남동발전)
저널정보
한국폐기물자원순환학회 한국폐기물자원순환학회지 한국폐기물자원순환학회지 제35권 제6호
발행연도
2018.1
수록면
561 - 570 (10page)

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This study investigated both leaching of heavy metals and ecological toxicity when coal bottom ash (CBA) generatedby power plants has been used to reduce both erosion and turbidity of surface runoff at construction sites. The Koreanleaching test (KLT) method, sequential extraction method, and acute toxicity test using Daphnia magna were performedto evaluate the environmental impacts and the ecological risks of CBA. According to the results of the KLT method ofCBA, trace amounts of Cu were leached at limit of quantitation whereas metal leaching was not monitored for other heavymetals. Through the sequential extraction method of CBA, the relatively high leaching potential was found for As andPb due to greater fraction of exchangeable (F1) and bound to carbonates (F2), and reasonable probability of leachingunder the reducing/anaerobic environment was expected for Cu due to high faction of bound to Fe?Mn oxides (F3). However, significantly low probability of leaching was expected for Cd, Cr, Ni, and Zn with grater fractions of boundto organic matter (F4) and residual (F5). Additionally, total amount of heavy metals in CBA was lower than criteria forsoil pollution concerns, and were similar or slightly lower levels than the ‘15 National soil average concentration excludingCr6+. Finally, acute toxicity test using Daphnia magna display no impact for mobilization and lethality in either the prefiltrationor post-filtration experiment, indicating that the ecological toxicity was insignificant with zero values of toxicunit. Consequently, no environmental impacts or ecological toxicity are expected when CBA generated by power plantshas been used to reduce both erosion and turbidity of surface runoff at construction sites.

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