Abstract
The safe disposal of coal combustion residues (CCRs) will remain a major public issue as long as coal is used as a fuel for energy production. Both dry and wet disposal methods of CCRs create serious environmental problems. The dry disposal method creates air pollution initially, and the wet disposal method creates water pollution as a result of the presence of trace and heavy metals. These leached heavy metals from fly ash may become more hazardous when they form toxic compounds such as arsenic sulfite (As2S3) and lead nitrate (N2O6Pb). The available studies on trace and heavy metals present in CCRs cannot ensure environmentally safe utilization. In this work, a novel approach has been offered for the retrieval of trace and heavy metals from CCRs. If the proposed method becomes successful, then the recovered trace and heavy metals may become a resource and environmentally safe use of CCRs may be possible.
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The authors acknowledge the support provided by the Department of Environmental Science and Engineering, Indian School of Mines, Dhanbad, for carrying out the research work.
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Kumar, A., Samadder, S.R. & Elumalai, S.P. Recovery of Trace and Heavy Metals from Coal Combustion Residues for Reuse and Safe Disposal: A Review. JOM 68, 2413–2417 (2016). https://doi.org/10.1007/s11837-016-1981-3
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DOI: https://doi.org/10.1007/s11837-016-1981-3