Adsorption characteristics ofthiobacillus ferrooxidanson surface of sulfide minerals
来源期刊：中南大学学报(英文版)2005年第6期
论文作者：柳建设 谢学辉 李邦梅 董青海
文章页码：671 - 676
Key words：thiobacillus ferrooxidans; sulphide mineral; adsorption; bio-leaching
Abstract: By usingthiobacillus ferrooxidans(T.f) from Qixiashan, Hubei Province, China, the adsorption characteristics ofT.fon surface of sulfide mineral were studied. The influences of adsorption time, pH value, temperature, initial inoculated concentration of bacteria, concentration of sulfide mineral powder, and variety of minerals on the adsorption characteristics were firstly investigated by using the ninhydrin colorimetric method, and the changes of contact angles and Zeta potentials of mineral surface during the bacterial adsorption were then determined. The results show that when the leaching experiments are performed for a long time from several days to a month, the maximal quantity of adsorption ofT.fon the surface of pyrite is obtained under the following conditions: leaching for 20 d, pH value in range of 1 2 and temperature at 30℃, respectively; when the bio-leaching experiments are performed for a shorter leaching time, the maximal quantity of adsorption is obtained under the conditions: bio-leaching for 2 h, at 2.4×107cell/mL of initial inoculated bacteria concentration, and at 10% of mineral powder concentration; and the adsorption quantities are different form one sulfide mineral to another, and the adsorption of T.fon the surface of sulfide minerals includes three phases: increasing phase, stationary phase and decreasing phase.
