硫化矿对浸矿细菌(Fe^(2+))氧化活性的影响

Effect of sulfide minerals on acidithiobacillus ferrooxidans oxidation activity of Fe^(2+)

研究了闪锌矿、黄铜矿、黄铁矿、方铅矿、元素硫和石英在矿浆密度分别为 0 .2 5 % ,0 .5 0 % ,0 .75 % ,1.0 % (固液比 )时氧化亚铁硫杆菌 (Fe2 + )的氧化活性。结果表明 :在矿浆密度为 0 .2 5 %时 ,石英对细菌 (Fe2 + )的氧化活性没有影响 ;而闪锌矿、黄铜矿、黄铁矿、方铅矿以及元素硫对浸矿细菌 (Fe2 + )的氧化活性都有一定的抑制作用 ,且随着硫化矿矿浆密度升高 ,对细菌氧化活性的抑制作用加剧。

The effects of sulfide minerals such as sphalerite, pyrite, ganela, chalcopyrite and sulfur on the growth and activity of wild and adapted acidithiobacillus ferrooxidans were studied under the common bioleaching condition of 30 ℃ and pH 2.0. Experimental results show that the rates of oxidizing Fe^(2+) decrease in the 9 K medium which contains sulfide minerals at four kinds of pulp density(0.25%, 0.50%, 0.75%, 1.0%) respectively. This means that sulfide minerals used in this experiment have effects on the growth and activity of wild and adapted acidithiobacillus ferrooxidans.