Comparative leaching experiments for trace elements in raw coal, laboratory ash, fly ash and bottom ash

Samples of raw coal, fly ash and bottom ash have been collected from a Chinese power plant together with laboratory ash obtained by ashing of the coal under 850°C. Comparative-leaching experiments were carried out on each fraction under various pH conditions. A mathematical model for leaching of tra...

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Bibliographic Details
Published in:International journal of coal geology 1999-06, Vol.40 (2), p.103-108
Main Authors: Wang, Yunquan, Ren, Deyi, Zhao, Fenghua
Format: Article
Language:English
Subjects:
bottom ash
Coal
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Exact sciences and technology
fly ash
laboratory ash
leaching experiments
Pollution, environment geology
raw coal
Sedimentary rocks
trace elements
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Summary:Samples of raw coal, fly ash and bottom ash have been collected from a Chinese power plant together with laboratory ash obtained by ashing of the coal under 850°C. Comparative-leaching experiments were carried out on each fraction under various pH conditions. A mathematical model for leaching of trace elements has been developed and leaching intensity ( I l) has been calculated for each element. The results show that pH of the solution, leaching time, and particularly, properties and occurrence of the elements, have a strong influence on leaching behavior.
ISSN:0166-5162
1872-7840
DOI:10.1016/S0166-5162(98)00062-7