Bioleaching of marmatite in high concentration of iron

来源期刊：中国有色金属学报(英文版)2002年第6期

论文作者：邱冠周 吴伯增 覃文庆 蓝卓越

文章页码：1168 - 1171

Key words：bioleaching; marmatite; bacteria

Abstract: Bioleaching of marmatite with a culture of Thiobacillus ferrooxidans and Thiobacillus thiooxidans in high concentration of iron was studied, the results show that the zinc leaching rate of the mixed culture is faster than that of the sole Thiobacillus ferrooxidans, the increasing iron concentration in leaching solution enhances the zinc leaching rate. The SEM analysis indicates that the chemical leaching residues is covered with porous solid layer of elemental sulfur, while elemental sulfur is not found in the bacterial leaching residues. The primary role of bacteria in bioleaching of sphalerite is to oxidize the chemical leaching products of ferrous ion and elemental sulfur, thus the indirect mechanism prevails in the bioleaching of marmatite.