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Abstract
The starting material Cr203 was prepared by thermal decomposition of bichromate salts and followed by thermal shock with molten KCl at 800°C in varied periods. XRD data indicated modified samples were still a-Cr2O3 without any trace of other phases. XPS data showed a trace amount of Cl on surface. The agglomerated particles were relatively uniform. The modified samples had a higher catalytic activity than the initial samples. For oxidation of Red Congo by air, the conversion reached 95,08% for modified samples as compared with 69,80% for initial samples and 0,81% if no catalyst was used. For treatment water from Nhiêu Lộc canal (Thị Nghè, HCMC), best result was obtained after 3 day treatment, COD of waste water diminued to 9,84 mg 02/L.
Issue: Vol 12 No 10 (2009)
Page No.: 35-40
Published: May 28, 2009
Section: Article
DOI: https://doi.org/10.32508/stdj.v12i10.2297
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