氧化亚铁硫杆菌与中度嗜热铁氧化菌浸出铁闪锌矿的比较

考察了采用氧化亚铁硫杆菌和中度嗜热铁氧化菌浸出铁闪锌矿浮选精矿的浸出效果. 结果表明，两种细菌的驯化菌株都可以显著提高铁闪锌矿的溶解速率，且接种中度嗜热铁氧化菌时浸出效果更好. 扫描电镜、X射线粉晶衍射和能谱分析等表明，接种不同菌种浸出铁闪锌矿时所产浸渣具有类似的表面形貌特征和矿物组成. 可以证明，采用中度嗜热铁氧化菌浸出铁闪锌矿浮选精矿可以在较高的温度和酸度下进行且具有更好的浸出效果，比氧化亚铁硫杆菌具有更好的工业应用前景.

Comparison of Bioleaching of Marmatite Flotation Concentrate with Acidithiobacillus ferrooxidans and a Moderately thermophlic Strain

The bioleaching of marmatite flotation concentrate by Acidithiobacillus ferrooxidans and Moderate thermophile (MLY) in the pure culture was carried out respectively, and the leaching effects with inoculation of different bacteria were examined. Experimental results showed that the adapted strains of two microorganisms could increase markedly the dissolution rate of marmatite, especially when inoculated with MLY strain. The mineralogyical analysis by scanning electron microscopy, X-ray diffraction and energy dispersive X-ray analysis indicated that the leached residues from the different bacteria had the similar morphological feature and chemical composition. It was demonstrated that the bioleaching of marmatite flotation concentrate by MLY was more effective when carried out under higher temperature and acidity, and would have better prospect industrial application than Acidithiobacillus ferrooxidans.