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| Last Updated:: 23/04/2014

LONG-TERM LEACHING STUDY OF COAL COMBUSTION RESIDUES FROM TISCO FLUIDISED BED COMBUSTION PLANT AT JAMADOBA

 

LONG-TERM LEACHING STUDY OF COAL COMBUSTION RESIDUES FROM TISCO FLUIDISED BED COMBUSTION PLANT AT JAMADOBA

 

 

Ritesh Kumar and Gurdeep Singh

 

 

ABSTRACT

Demand for energy has increased enormously during the last decade or two. Coal is the dominant source of electricity generation and being high in ash content the problem of fly ash and bottom ash disposal is also increasing day by day. The present study addressees the long-term leaching of trace elements/heavy metals from coal combustion residues of Tisco fluidised bed combustion plant at Jamadoba. The aim of this work is to provide the basic scientific data for bulk utilisation of coal combustion residues and for reducing environmental pollution. The results of the analysis of leachates from open percolation column experiment, ASTM shake test and acid digest test establishes that coal combustion residues from fluidised bed combustion plant are environmentally benign with respect to leaching of trace elements/heavy metals. In case of TCLP test some of the lements were observed at very high concentrations. However, the condition as TCLP provides could hardly be observed in the field. Open percolation column experiment is the best among all the four leaching methodology as it mimic the field situation that can be expected in the field.

 

 

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