Ram , L.C. and Masto, R.E. and Choudhury, D.P. and Maity, Sudip (2015) Investigations on PAHs and trace elements in coal and its combustion residues from a power plant. Fuel, 162. pp. 138-147. ISSN 0016-2361

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Abstract

Meeting the ever-growing demand of global energy in an eco-friendly manner necessitates the evaluation of coal and its combustion residues. For management of coal combustion and its residues on sustainable basis, characterization of trace elements and polycyclic aromatic hydrocarbons (PAHs) is imperative. The feed coal, fly ash, and bottom ash from a power plant (Unchahar, India) were evaluated. Feed coal is low grade high volatile sub-bituminous. Quartz and kaolinite are the predominant minerals in the coal, whereas quartz, mullite, and anhydrite in the ashes. Si > Al > Fe > Ca are the major elements in coal and it ashes. As compared to coal, most of the elements are enriched in the ashes; especially As, Cu, Ni, Pb, and Zn are highly enriched (enrichment factor > 5.0) in fly ash. Cluster analysis showed that As, Co, and Cd are associated with the ash forming elements like P–Mg–Ca–S; Ni, V, Cu, Pb, Zn, and Cr with Al-silicate minerals. Leaching study revealed that the trace elements are within the permissible limits for industrial effluents. The total PAHs content was much higher in coal (4542 lg kg�1) than fly ash (32.4 lg kg�1) and bottom ash (10.1 lg kg�1). High molecular weight PAHs were predominant in coal and fly ash, low molecular weight PAHs in bottom ash.

Item Type:	Article
Uncontrolled Keywords:	Coal Ash PAHs Trace elements Leaching
Subjects:	Enviornmental Management
Divisions:	UNSPECIFIED
Depositing User:	Mr. B. R. Panduranga
Date Deposited:	18 Sep 2015 10:25
Last Modified:	18 Sep 2015 10:25
URI:	http://cimfr.csircentral.net/id/eprint/1520

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