Abstract
Manganese minerals are widely distributed throughout the globe. The most important industrial uses of Mn are in the manufacture of steel, non-ferrous alloys, carbon-zinc batteries and some chemical reagents. Microbial recovery of manganese from low grade manganese ores using bioleaching was investigated in this paper. A bacterial strain, Staphylococcus epidermidis (MTCC-435) was collected from microbial type culture collection, IMTECH Chandigarh and used for the experiment. The experimental results for bioleaching with S. epidermidis showed that under pH 5.5, particle size –150 μm, pulp density 10%, temperature 35℃ and agitation 200 rpm, about 80% of Mn was recovered within 20 days of incubation.
Highlights
The necessity for manganese ore has increased due to the escalating shortage of natural resources and increase in the manufacture of Steel, dry cell batteries and some portion of manganese oxide [1]
The experimental results for bioleaching with S. epidermidis showed that under pH 5.5, particle size −150 μm, pulp density 10%, temperature 35 ̊C and agitation 200 rpm, about 80% of Mn was recovered within 20 days of incubation
Best manganese leaching solubilisation was observed at –150 μm, it was assumed that manganese extraction yield was maximum (64%) for fine particle size and due to the accessibility of the reaction areas with the particle size to the microbial strain (Figure 2(a))
Summary
The necessity for manganese ore has increased due to the escalating shortage of natural resources and increase in the manufacture of Steel, dry cell batteries and some portion of manganese oxide [1]. Indian manganese ores are preferred by many as they are generally hard, lumpy and amenable to easy reduction. The development of bioleaching technology focuses on achieving effective recovery of precious metals by improving the efficiency of bioleaching microorganisms [3,4]. This relates to manganese solubilising activities of manganese-oxidizing microbes and the speciation of intermediate compounds formed during bioleaching processes [5]. In the present research work, bioleaching technology was applied for manganese recovery from low grade manganese ore
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