Heavy metals leaching in Indian fly ash.

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dc.contributor.authorPrasad, Bablyen_US
dc.contributor.authorMondal, Kajal Kumaren_US
dc.date.accessioned2008-04-20en_US
dc.date.accessioned2009-06-02T05:09:29Z
dc.date.available2008-04-20en_US
dc.date.available2009-06-02T05:09:29Z
dc.date.issued2008-04-20en_US
dc.description.abstractFly 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 is 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 leachability when these wastes are disposed of. A cascade-leaching test was used at liquid-to-solid ratio (L/S) ranging between 20 and 100. Both fly ash samples exhibited neutral reactions, as indicated by pH values <11.75 and >7.0 at L/S=10 and contact time of 10 minutes. The percentage of leached amounts found to follow the trend Zn>Fe>Mn>Cr>Pb>Cu>Ni>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.en_US
dc.description.affiliationCentral Institute of Mining and Fuel Research, Barwa Road, Dhanbad-826 001, Jharkhand. drbablyprasad@yahoo.comen_US
dc.identifier.citationPrasad B, Mondal KK. Heavy metals leaching in Indian fly ash. Journal of Environmental Science & Engineering. 2008 Apr; 50(2): 127-32en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/114048
dc.language.isoengen_US
dc.source.urihttps://www.neeri.res.in/jese.htmlen_US
dc.subject.meshCarbon --chemistryen_US
dc.subject.meshEnvironmental Monitoringen_US
dc.subject.meshEnvironmental Pollutants --analysisen_US
dc.subject.meshHydrogen-Ion Concentrationen_US
dc.subject.meshIndiaen_US
dc.subject.meshIndustrial Wasteen_US
dc.subject.meshMetals, Heavy --analysisen_US
dc.subject.meshParticulate Matter --chemistryen_US
dc.subject.meshPower Plantsen_US
dc.titleHeavy metals leaching in Indian fly ash.en_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
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