Ram, L.C. and Srivastava, N.k. and Tripathi, R.C. and Thakur, Sanjay Kumar and Sinha, Awadhesh Kumar and Jha, S.K. and Masto, R.E. and Mitra, Swapan (2007) Leaching behavior of lignite fly ash with shake and column tests. Environmental Geology, 51 (7). pp. 1119-1132. ISSN 0943-0105

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The maximum concentration of the majority of the trace metals in the leachates from shake and column test of lignite fly ash (LFA) was within the prescribed limits; however, total dissolved solids, total hardness, cations and anions (except K+), being above the prescribed limits, may lead to the increase in the hardness and salinity in the soil on the disposal of LFA. Present generation of huge amount of fly ash from thermal power plants (TPPs) is a big challenge concerning contamination of soil, crop produce and surface and ground water bodies due to the presence of some of the toxic trace metals in it. The leaching behavior of alkaline LFA (pH, 10.94), from TPP of Neyveli Lignite Corporation (NLC), India, was investigated by shake and column tests using water and sodium acetate buffer. The leaching of trace metals from LFA was governed by their concentrations, association with the ash particles, leaching duration and pH of the leachate (most influencing parameter). The leaching of metals followed the order: buffer column > aqueous column > aqueous shake > buffer shake test.

Item Type: Article
Uncontrolled Keywords: Thermal power plants, Trace metals, Lignite fly ash, Leaching, Permissible limits
Subjects: Enviornmental Management
Depositing User: Dr. Satyendra Kumar Singh
Date Deposited: 04 Jan 2012 05:24
Last Modified: 04 Jan 2012 05:24
URI: http://cimfr.csircentral.net/id/eprint/568

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