Detoxification of Chlorinated Aromatics Adsorbed on Fly Ash under Microwave Irradiation

Takamasa KISHIMA  Tsuyoshi KOIZUMI  Yoshio IIO  Sumio TUJII  Yuji WADA  Tetsushi YAMAMOTO  Hengbo YIN  Takayuki KITAMURA  Shozo YANAGIDA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.12   pp.2474-2478
Publication Date: 2003/12/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Recent Trends on Microwave and Millimeter Wave Application Technology)
Category: Chemical Application
Keyword: 
detoxification,  fly ash,  chlorinated organics,  microwave,  

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Summary: 
We succeeded in detoxification of hexachloro-benzene adsorbed on artificially produced fly ash in air by irradiating microwave (2.45 GHz) in the presence of activated carbon powder. Hexachlorobenzene was decomposed by 50-90% at 200-300 by MW irradiation of 1-1.5 min when the ash contained activated carbon by 12 wt% and water by 10 wt%. Chlorinated benzene derivatives are dechlorinated through substitution of chloride anion with hydroxylation produced by basic CaO in the co-presence of activated carbon effectively heated by MW. This method using microwave irradiation enables us to treat the contaminated fly ash in a shorter time and decompose hexachlorobenzene more efficiently than the conventional heating.