BACTERIAL DISSOLUTION OF PYRITE BY THIOBACILLUS-FERROOXIDANS

被引：54

作者：

KONISHI, Y

ASAI, S

KATOH, H

机构：

[1] Department of Chemical Engineering, University of Osaka Prefecture, Osaka, 591, Sakai

来源：

BIOPROCESS ENGINEERING | 1990年 / 5卷 / 05期

关键词：

D O I：

10.1007/BF00376230

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The kinetics of the dissolution of pure pyrite (FeS2) particles by Thiobacillus ferrooxidans were studied both theoretically and experimentally. Adsorption and dissolution experiments were carried out at 30 °C and pH=2, by using a batch reactor. The adsorption process of T. ferrooxidans to pyrite surface was rapid in comparison with the bacterial dissolution process. The experimental results for the adsorption equilibrium were well correlated by the Langmuir type isotherm. The growth rate of adsorbed bacteria was found to be proportional to the product of the number of adsorbed cells and the fraction of solid surface unoccupied by cells. A new kinetic model for the bacterial dissolution was presented, and shown to correlate well with the experimental data for the rate of bacterial dissolution and for the time variation in the number of cells in the liquid phase. The specific growth rate of adsorbed bacteria was also evaluated. © 1990 Springer-Verlag.

引用

页码：231 / 237

页数：7

共 16 条

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