Study On Selective Adsorption Of Mycobacterium Phlei On The Surfaces Of Pyrite And Sphalerite

Along with the continuous exploitation and utilization of mineral resource, the proportion of unwieldiness ores with deficient, poor and complicated character is rising day and day. As a result, the mineral processing fields face serious challenge, and using more medicaments will pollute environment. Under these circumstances, microbial technology to resources emerges as the times require, which provides a new way to solve the problem of mineral resources utilization. After developing for nearly forty years, microbial technology to resources has gained great achievement in basal research and practical application.The research about bacteria adsorbing on the surface of mineral that has been carried out, is mainly to discuss the function mechanism in the progress of biohydrometallurgy. The main content are factors influencing the adsorbing biomass, the relationship of the adsorbing biomass and bioleaching effect, and the macroscopic effect after adsorption, but seldom pays close attention to the selectivity in the progress of adsorption. Considering above problems, the paper mainly study the adsorption regularity of Mycobacterium Phlei on the surfaces of pyrite and sphalerite. The results show that:1. the selective adsorption of Mycobacterium Phlei on the surfaces of pyrite and sphalerite is obvious, and maximum adsorption rate on the surface of pyrite is 96.75%, whereas less than 20% to sphalerite; the conditions of showing selective adsorption are mineral slurry concentration over 6g/L, bacterium density between 0.5 and 4g/L and pH over 4.95. Temperature has little effect, and pH value is the key factor influencing Mycobacterium Phlei on the surfaces of pyrite and sphalerite;2. domesticating Mycobacterium Phlei by destination mineral can improve its adsorption on this mineral, and the selective adsorption of domesticated Mycobacterium Phlei on the surface of pyrite and sphalerite becomes more obvious. Under the conditions of mineral slurry concentration over 5g/L, bacterium density between 0.5 and 4g/L and pH over 4.95, the selective adsorption of domesticated Mycobacterium Phlei on the surfaces of pyrite and sphalerite is obvious;3. under the conditions of every experimental factors, the binding energy of...