Selection of High-Efficiency Potassium-Dissolving Strains and Optimization of the Potassium-Dissolving Process
XUE Yong-ping1,2, XIAO Chun-qiao3, ZHANG Yan-tu4, CHI Ru-an1
1.School of Xingfa Mining Engineering, Wuhan Institute of Technology, Wuhan 430073, Hubei, China;
2.School of Telecommunication and Information Engineering,Wuhan Institute of Technology, Wuhan 430073, Hubei,China;
3.School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan 430205, Hubei, China;
4.College of Chemistry & Chemical Engineering, Yan'an University, Yan'an 716000, Shaanxi, China
Abstract：A bacterium JX-5 was obtained after separation and selection through enrichment and purification from the mine soil, which could be used to dissolve potassium feldspar, so as to extract the undisolvable potassium therein. As a result, the problem of lacking dissolvable potassium resources in the soils could be solved. By using 16S rRNA gene sequencing, JX-5 strain was identified as a kind of gram-negative bacillus megaterium. The influences of temperature, time, rotating speed and the initial pH for incubation, as well as concentration and grain size of the powdered potassium feldspar, inoculation volume and the ammonium sulfate concentration on the ability of the JX-5 strain to dissolve potassium were all investigated. The results show that the leaching rate of potassiumc can reach 20.79% by using JX-5 strain optimally in a 12-day culture at the temperature of 28 ℃, with the rotation speed of 170 r/min, an initial pH value of 7.0~8.0, and 2 g/L potassium feldspar with grain size of 0.03~0.04 mm at an amount of inoculation of 25%, and 0.2~0.3 g/L ammonium sulfate. It is concluded that JX-5 bacteria, with strong potassium-dissolving capacity, can make potassium ore effectively dissolved.
薛永萍, 肖春桥, 张琰图, 池汝安. 高效分解钾长石细菌的分离筛选及解钾工艺优化[J]. 矿冶工程, 2021, 41(2): 70-74.
XUE Yong-ping, XIAO Chun-qiao, ZHANG Yan-tu, CHI Ru-an. Selection of High-Efficiency Potassium-Dissolving Strains and Optimization of the Potassium-Dissolving Process. Mining and Metallurgical Engineering, 2021, 41(2): 70-74.
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2021, Vol. 41 
