Abstract
In this investigation, the bioleaching of potassium, silicon and aluminum from natural illite by three strains ofPaenibacillus polymyxa,Agrobacterium tumefaciensandPenicillium heteromorphumpurchased from China General Microbiological Culture Collection Center was studied. Chemical analyzing investigation indicated that K2O , SiO2and Al2O3were major chemical components. Bioleaching tests were performed in an orbital shaker with 250mL conical flasks at 30°C and 200 r/min agitation. The results show that, In the whole bioleaching process, the maximum extracts of K2O , SiO2and Al2O3are 1.96, 7.96 and 4.57 g/L respectively withPaenibacillus polymyxa, 1.73, 6.9 and 4.19 g/L withAgrobacterium tumefaciens, and 1.68, 6.23 and 7.12 g/L withPenicillium heteromorphum.Paenibacillus polymyxais the most efficient of releasing K and Si, the most efficient of releasing Al is the strain ofPenicillium heteromorphum.
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