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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Chemical Composition and Leaching Characteristic of Coal Fly Ash

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1998, v.11 no.5, pp.394-399
Rhee, Dong Seok
Kim, Jong Boo
Joo, Kwang Suk
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Abstract

This study was carried out to characterize the chemical composition and leaching properties of heavy metals in coal fly ash, which was generated from Korean electrical power utilities in several million tons per year. Comparion with respect to the leachability of heavy metals between the Korea standard leaching test (KSLT) and the American Environment Protection Agency (EPA) method 1311 (TCLP: Toxicity Chracteristic Leaching Procedure) was performed. The concentration of Ag, As, Ba, Cd, Cr, Cu, Pb, Se, Hg in the leacheate was determined by ICP-MS. The analytical result showed a significant difference of the leachability according to the characteristics of the leaching solution except Se, suggesting the necessity of improvement in the leaching test method that is currently implemented in Korea.

keywords
coal fly ash, leaching test, korea standard leaching test, TCLP


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