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- W2358575959 abstract "Chromium residue is a hazardous solid waste with strong oxidation and it can cause heavy contamination to our surroundings. We adopt technique of coal gangue brick to dispose chromium residue and the leached Cr concentration and phase in sintered bricks with five various weight ratios of chromium residue to coal gangue. The results show that the percentage of Cr(Ⅵ) deoxidized to Cr(Ⅲ) in bricks with proper ratio of chromium residue to coal gangue can reach above 95% and the leached Cr concentration is much less than corresponding standard of state. All of above show that compounds of Cr(Ⅵ) are deoxidized by carbon and CO, H_2, CH_4 etc. on the condition of high temperature during sintering. X-powder diffraction shows that in bricks, there are phases such as picrite, spinelle and aluminium silicate which increases the stabilization of Cr(Ⅵ) and this form of Cr(Ⅵ) are not easily leached. So the existing forms of Cr are steady and can stand adverse environmental conditions and not dissolving again. So the brick can be used safely without worries." @default.
- W2358575959 created "2016-06-24" @default.
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- W2358575959 date "2005-01-01" @default.
- W2358575959 modified "2023-09-25" @default.
- W2358575959 title "Detoxification mechanism of Cr(VI) in chromium residue-coal gangue brick" @default.
- W2358575959 hasPublicationYear "2005" @default.
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