| Issue |
MATEC Web Conf.
Volume 142, 2018
International Conference on Materials Applications and Engineering 2017 (ICMAE2017)
|
|
|---|---|---|
| Article Number | 01003 | |
| Number of page(s) | 7 | |
| Section | Chemical Materials and Chemical Syntheses | |
| DOI | https://doi.org/10.1051/matecconf/201814201003 | |
| Published online | 08 January 2018 | |
Cyanide Containing Wastewater Treatment by Ozone Enhanced Catalytic Oxidation over Diatomite Catalysts
1
Liaoning Xindu Gold Co., Ltd, 122000 Chaoyang, China
2
General Research Institute for Nonferrous Metals Engineering, National Engineering Laboratory of Biohydrometallury, 100088 Beijing, China
* Corresponding author: wellwoodliu@163.com
Cyanide containing wastewater that discharged from gold mining process creates environmental problems due to the toxicity of cyanide. As one of the promising advanced oxidation process, catalytic oxidation with ozone is considered to be effective on the purification of cyanide. Diatomite, a natural mineral, was used as catalyst in this study. The effect of O3 dosage, salinity, initial cyanide concentration and initial pH condition were investigated. It was observed that the removal rate of cyanide was much higher in the catalytic oxidation with ozone process than the one in zone alone process. Alkaline condition was especially favorable for cyanide in catalytic oxidation with ozone. The ozone and catalytic oxidation with ozone were simulated by pseudo-first-order kinetics model. The apparent first-order rate constant contribution of the diatomite catalyst was 0.0757 min-1, and the contribution percentage was 65.77%.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/).
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