Prasad, Bably (2008) Heavy Metals Leaching in Indian Fly Ash. Journal of Environmental Science & Engineering , 50 (2). pp. 127-132. ISSN 0367-827 X

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Fly ash is an industrial waste generated from thermal power plants. Fly ash constitutes 80-85% of the total ash produced. A small part of fly ash is utilised in some sectors such as construction materials, building engineering, road back fill, agriculture, selective engineering and processing useful materials. A large part of fly ash produced in disposed of with very high environmental risk. In the present paper, laboratory leaching test has been used to determine the potential mobility of Pb, Cd, Cr, Cu, Zn, Fe, Mn and Ni in fly ash samples, collected from chandrapura Thermal Power plant, Jharkhand and Ramagundam Super Thermal Power Plant, Andhra Pradesh, in order to assess their leachabilitywhen these wastes are disposed of. A cascade-leaching test was used at liquid-to-solid ration (L/S) ranging between 20 and 100. Both fly ash samples exhibited neutral reations, as indicated by pH values <11.75 and 7.0at L/S=10 and contact time of 10 minutes. The ash from Chandrapura and Fe>Zn>Cu>Mn>Cr>Ni>Pb>Cd for fly ash from Chandrapura and Fe>Zn>Cu>Mn>Cr>Ni>Pb>Cd for fly ash from Ramagundam. Effect of pH on metals released from ash surface in aqueous solution followed a predictable pattern of decreasing release with increasing pH.

Item Type: Article
Uncontrolled Keywords: Heavy metals leaching, fly ash, Water pollution
Subjects: Envieronmental Management Group
Depositing User: Mr. B. R. Panduranga
Date Deposited: 31 Dec 2011 04:01
Last Modified: 29 Aug 2016 09:59

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