Acknowledgement
Supported by : 한국과학재단
Analytical Science and Technology (분석과학)
- Volume 11 Issue 5
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- Pages.394-399
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- 1998
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- 1225-0163(pISSN)
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- 2288-8985(eISSN)
Chemical Composition and Leaching Characteristic of Coal Fly Ash
비산석탄회의 화학조성과 용출특성
- Rhee, Dong Seok (Division of Environmental and Biological Engineering, Kangwon National University) ;
- Kim, Jong Boo (Department of Material Science and Engineering, Kangwon National University) ;
- Joo, Kwang Suk (Department of Material Science and Engineering, Kangwon National University)
- Received : 1998.05.20
- Published : 1998.10.25
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.
석탄 화력발전소의 비산회를 재활용하여 산업원료로 유효하게 활용하기 위한 조사로 이에 대한 물리화학적 분석외에 용출시험을 시행하였다. 비산석탄회에 함유된 유해 중금속의 용출시험시 용매에 의한 영향과 방해물질의 작용 등을 고려하여, 용출시험은 국내 폐기물 공정시험법에 따른 방법과 미국 환경청의 EPA Method 1311(TCLP)법을 비교 실험하였으며, 용출액은 EPA Method 3050B를 이용하여 전처리 한 후, ICP-MS를 사용하여 9종의 중금속(Ag, As, Ba, Cd, Cr, Cu, Pb, Se, Hg)을 분석하였다. 용출시험의 결과는 Se 경우를 제외한 모든 금속에서 TCLP법에 의한 용출 농도가 1.2~5배로 높게 나타났다.