XPS STUDY OF MNO2 MINERALS TREATED BY BIOLEACHING

被引：41

作者：

DICASTRO, V

POLZONETTI, G

CONTINI, G

COZZA, C

PAPONETTI, B

机构：

[1] CNR,INST MINERAL PROC,I-00138 ROME,ITALY

[2] UNIV LAQUILA,DEPT CHEM CHEM ENGN & MAT,I-67040 LAQUILA,ITALY

来源：

SURFACE AND INTERFACE ANALYSIS | 1990年 / 16卷 / 1-12期

关键词：

Manganese Compounds;

D O I：

10.1002/sia.7401601120

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

XPS has been used to follow the change of the ore surface composition during bioleaching with a mixed culture of microorganisms. In the original sample, the presence of MnO2 together with silica and alumina is observed. During bioleaching, Mn(IV) is progressively reduced to Mn(II) and signals due to the presence of the microorganisms appear in the C 1s and N 1s spectra. In the residual sample, a considerable amount of Mn associated with the cells of the microorganisms of reprecipitated in the from of the Mn(OH)2 is present on the surface of the ore. This Mn species can be removed completely by treatment with a dilute soultion of HCI. Copyright © 1990 John Wiley & Sons Ltd.

引用

页码：571 / 574

页数：4

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