Mechanisms involved in bioleaching of an aluminosilicate by heterotrophic microorganisms

被引：68
|
作者：
Rezza, I
Salinas, E
Elorza, M
de Tosetti, MS
Donati, E
机构：
[1] Natl Univ La Plata, Fac Ciencias Exactas, CONICET, CINDEFI, RA-1900 La Plata, Argentina
[2] UNSL, Fac Quim Bioquim & Farm, RA-5700 San Luis, Argentina
来源：
PROCESS BIOCHEMISTRY | 2001年 / 36卷 / 06期
关键词：
bioleaching; aluminosilicate; heterotrophic microorganisms; Aspergillus niger; Penicillium purpurogenum; Rhodotorula rubra;
D O I：
10.1016/S0032-9592(00)00164-3
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
Mechanisms involved in bioleaching of an aluminosilicate (95% of spodumene) by heterotrophic microorganisms were investigated. Two moulds (Aspergillus niger and Penicillium purpurogenum) and a yeast (Rhodotorula rubra), all isolated from the mineral, were assayed. The mineral was put into the bioleaching medium under two different conditions: free or into a dialysis tube. The bioleaching mechanism for A. niger or P. purpurogenum was related to the production of low molecular weight metabolites, mainly organic acids. In contrast, bioleaching by R. rubra was related to its metabolic activity and to structural macromolecules of the capsule and the cell wall. (C) 2001 Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：495 / 500
页数：6
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