Characterization of changes of low and high defect kaolinite after bioleaching

被引：14
作者：
Mockovciakova, A. [1 ]
Iveta, Styriakova [1 ]
Jiri, Skvarla [2 ]
Ivana, Kozakova [2 ]
机构：
[1] SAS, Inst Geotech, Kosice 043053, Slovakia
[2] TU Kosice, Fac Mining Ecol Proc Control & Geotechnol, Kosice, Slovakia
来源：
APPLIED CLAY SCIENCE | 2008年 / 39卷 / 3-4期
关键词：
kaolinite mineral; bioleaching; Bacillus spp; iron;
D O I：
10.1016/j.clay.2007.06.002
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 ; 081704 ;
摘要：
Two samples of well and poorly ordered kaolinites KG1 and KG2 (designated according to a Handbook for Clay Minerals) have been studied with the aim to describe their structure after biological leaching and removal of iron that decreases the refractoriness of products made of various kaolins. The influence of the biological treatment by silicate bacteria of Bacillus spp. on the process of impurities dissolution was evaluated by the changes occurring on the surface and in the structure of the minerals. The bioleaching of clays and extraction of Fe, Al and Si were per-formed during 100 days lasting incubation and the products were characterized by XRD, granulometric analyses, EDX and nitrogen adsorption techniques. The qualitative changes of the particles surface charge were measured by the electrophoretic mobility of particles in the electric field. (C) 2007 Elsevier B.V. All rights reserved.
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页码：202 / 207
页数：6
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