Effects of Potassium-Dissolution Microorganisms on Surface Properties of Orthoclase and Bioleaching

Abstract:

The alternation of surface properties of orthoclase after biological conditioning with Bacillus mucilaginosus and Aspergillus niger was investigated by zeta potential and adsorption studies. Bioleaching potassium from orthoclase by the two strains were also studied. Results show that IEPs of the two strain continuously decrease in their each logarithmic phase and stable phase. the IEP of orthoclase, after which interaction with cells, moves towords the IEP of cells. The adsorption of B·mucilaginosus is faster and higher than Aspergillus niger onto orthoclase. The potassium extractions by adapted B·mucilaginosus and unadapted B·mucilaginosus reach 24.0% and 18.5% respectively, 23.0% and 20.0% respectively by adapted Aspergillus niger and unadapted Aspergillus niger after bioleaching 9 d.

• Periodical: Advanced Materials Research (Volumes 753-755)
• Pages: 109-113
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.753-755.109
• Online since: August 2013
• Authors: Shou Fa Zhan, Ye Chen, De Si Sun
• Keywords: Adsorption, Bioleaching, Microorganism, Orthoclase, Surface Properties

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