闪锌矿的生物氧化与化学氧化对比

Comparison of Biological Oxidation and Chemical Oxidation of Sphalerite

研究了氧化亚铁硫杆菌对闪锌矿的生物氧化作用,并与Fe3+氧化过程进行了对比。研究表明Fe3+比细菌具有更高的氧化效率,但生物氧化的效率更稳定。闪锌矿生物氧化过程中氧化亚铁硫杆菌的生长经历了延迟期、指数期、稳定期和衰退期,有部分细菌吸附到了矿物表面,未发现中间物质单质硫沉淀。而闪锌矿的化学氧化过程中有大量的单质硫沉淀到了矿物表面,说明生物氧化更彻底。

The roles of thiobacillus ferrooxidans in biological oxidation of sphalerite was studied, which was compared with the process of Fe3＋ oxidation. The studies showed that Fe3＋ has a higher oxidation efficiency than the bacteria, but the efficiency of bio - oxidation is more stable. In biological oxidation process of sphalerite, thiobacillus ferrooxidans experiences delay period, exponential phase, stable phase and decline stage in its growth. Some of bacterial attach to the mineral surface, but no precipitation of intermediate sulfur is appeared. While, in the chemical oxidation of sphalerite, a large number of sulfur are settled on the mineral surface, indicating that the biological oxidation is more thorough.