Importance of the Bacterial Adhesion During the Biooxidation Processing Gold Concentrates

Metal Mine ›› 2012, Vol. 41 ›› Issue (01): 92-96+114.

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Importance of the Bacterial Adhesion During the Biooxidation Processing Gold Concentrates

Sun Lixin^1,2，Zhang Xu^1,2，Tan Wensong^1,2，Zhu Minglong^1,2，Liu Ruiqiang³，Li Chunqiang³

1.School of Biotechnology of East China University of Science and Technology；2.State Key Laboratory of Bioreactor Engineering；3.Shangdong Tiancheng Bidagical gold Ltd

Online:2012-01-11 Published:2012-01-11

Abstract

Abstract: Several sulfide mineral oxidation experiments were carried out， which the mineral oxidized by free suspended cell， partly adhesion cell， adhesion cell and abiotic.Variations in the concentrations of iron ions and bacteria， redox potential were monitored in the mineral oxidation systems.The results show that the Eh value and the mineral oxidation when the bacteria adhered are higher than those when the bacteria suspended and abiotic.The surface morphology of the mineral before and after oxidation is observed.There are obviously several holes on the mineral surface which caused by the adhered cell.The mineral oxidation by free suspended cell is higher than that in abiotic condition.Sodium hexametaphosphate added could change the electrical properties of the mineral surface and promote the percentage of cell adhesion on the mineral.

Key words: Refractory gold concentrate, Biooxidation, Acidithiobacillus ferrooxidans, Adhesion

SUN Li-Xin, ZHANG Xu, TAN Wen-Song, ZHU Ming-Long, LIU Rui-Qiang, LI Chun-Qiang. Importance of the Bacterial Adhesion During the Biooxidation Processing Gold Concentrates[J]. Metal Mine, 2012, 41(01): 92-96+114.

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