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BIOBENEFICATION OF SILICA SAND FOR CRYSTAL GLASS INDUSTRY FROM ARDHUMA LOCATION, IRAQI WESTERN DESERT | ||
| Iraqi Bulletin of Geology and Mining | ||
| Article 1, Volume 7, Issue 1, 2011, Pages 77-86 | ||
| Authors | ||
| Ibtisam G. Issa; Ibtihal K. Fleah; Tanya V. Khachiek; Noor D. Bader; ; a M.K. Mustafa | ||
| Abstract | ||
| Silica sand from Ardhuma deposit in the Iraqi Western Desert has been biobeneficiated using mold Aspergillus niger to enhance its chemical properties, especially that associated with the removal of iron oxide impurities. The biobeneficiated silica sand obtained matches the required Fe2O3% level for crystal glass industry, which is less than 0.01%. The efficiency of Fe2O3 removal by bioleaching process; alone was 79.1%, the Fe2O3 content was 0.0125%. Whereas, combination of magnetic separation and bioleaching have improved the removal efficiency to 85.8%. The Fe2O3 obtained was 0.0085%. Silica sand produced by this approach have very low iron oxide content thus, it can be used for optical and crystal glass, as well as solar cell and semiconductors. The cost of bioleaching process was largely minimized as an alternative non-expensive source of carbon, which is Date extract used instead of highly expensive glucose. | ||
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