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Issue 5, 2003
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Investigation into the relationship between major and minor element contents and particle size and leachability of boron in fly ash from coal fuel thermal power plants

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Abstract

A basic investigation of boron in discharged fly ash by coal fuel thermal power plants in several worldwide locations was carried out. Eight kinds of fly ash sample were prepared from eight coal fuel thermal power plants. Two of the fly ash samples were used to examine the relationship between the concentration of boron in fly ash and the particle size. When the particle size of fly ash is smaller, there is a possibility that it will be released into the air and spread over a wide area in the environment. However, it has become apparent that fly ash of smaller particle size has a higher concentration of boron and a higher enrichment factor. In other fly ash samples, the boron contents were examined and leaching tests were carried out. There is acidic fly ash as well as alkaline fly ash that contains larger amounts of acidic or basic salts. On alkaline fly ash, when the concentration of boron bound to Fe–Mn oxide is low; it has become apparent that leaching boron is increased in a solution with lower pH of approximately 4 which is nearly the pH of acid rain.

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Publication details

The article was received on 13 May 2003, accepted on 24 Jul 2003 and first published on 07 Aug 2003


Article type: Paper
DOI: 10.1039/B305392J
Citation: J. Environ. Monit., 2003,5, 831-836
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    Investigation into the relationship between major and minor element contents and particle size and leachability of boron in fly ash from coal fuel thermal power plants

    T. Narukawa, K. W. Riley, D. H. French, A. Takatsu and K. Chiba, J. Environ. Monit., 2003, 5, 831
    DOI: 10.1039/B305392J

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