Kinetics and mechanism of uranium bioleaching from a low grade indian ore

Abhilash, and Pandey, B D and Ray, L (2010) Kinetics and mechanism of uranium bioleaching from a low grade indian ore. In: Proceedings of the XI International Seminar on Mineral Processing Technology (MPT-2010), Dec 2010, NML Jamshedpur, India.

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Abstract

Uranium leaching mechanism by biogenic ferric ions from the enriched culture of Acidithiobacillus ferrooxidans from a low grade Indian uranium ore has been elucidated. Biodissolution of 98% uranium was obtained at 20% (w/v) pulp density, 1.7 pH and 35°C temperature using <76 µm particles in 40 days under the optimized conditions. Iron (III) generated through the bacterial oxidation of pyrite and chemical dissolution of magnetite present in the ore under acidic condition, has a bearing on the bioleaching of uranium. The kinetics of uranium dissolution by bacteria followed the chemical control model which was corroborated by XRD and SEM studies.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:http://eprints.nmlindia.org/2607
Uncontrolled Keywords:Uranium, Bioleaching, Indirect leaching, Biogenic ferric ions.
Divisions:Metal Extraction and Forming
ID Code:2607
Deposited By:Mr. A.K. Sahu
Deposited On:15 Mar 2011 16:10
Last Modified:15 Aug 2012 20:30
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