微生物浸出MnO2过程中嗜酸氧化亚铁硫杆菌与Fe3+的催化作用

doi:10.3969/j.issn.0438-1157.2014.08.042

化工学报 ›› 2014, Vol. 65 ›› Issue (8): 3159-3163.DOI: 10.3969/j.issn.0438-1157.2014.08.042

微生物浸出MnO₂过程中嗜酸氧化亚铁硫杆菌与Fe³⁺的催化作用

张旭¹, 冯雅丽¹, 李浩然², 王维大¹

1 北京科技大学土木与环境工程学院, 北京 100083;
2 中国科学院过程工程研究所生化工程国家重点实验室, 北京 100190

收稿日期:2013-10-24 修回日期:2014-03-24 出版日期:2014-08-05 发布日期:2014-08-05
通讯作者: 张旭
基金资助:
国家自然科学基金项目（21176242，21176026）；中央高校基本科研业务费专项资金（FRT-TP-09-002B）；国家支撑项目（2012BAB14B05，2012AA062401）；中国大洋矿产资源研究开发计划项目（DY125-15-T-08）。

Catalytic effect of acidithiobacillus ferrooxidans and Fe³⁺ on microbial leaching process of MnO₂

ZHANG Xu¹, FENG Yali¹, LI Haoran², WANG Weida¹

1 School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2 National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2013-10-24 Revised:2014-03-24 Online:2014-08-05 Published:2014-08-05
Supported by:
supported by the National Natural Science Foundation of China(21176242, 21176026).

摘要/Abstract

摘要： 考察了MnO₂-FeS₂-H₂SO₄细菌浸出体系下，嗜酸氧化亚铁硫杆菌和Fe³⁺单独或联合对MnO₂浸出Mn²⁺的浸出速率影响，并采用循环伏安电化学方法对过程中嗜酸氧化亚铁硫杆菌与Fe³⁺的催化作用进行了分析。结果表明：嗜酸氧化亚铁硫杆菌和Fe³⁺单独或联合都可以有效提高MnO₂浸出Mn²⁺的浸出速率，对MnO₂细菌浸出过程有一定催化作用；循环伏安电化学分析表明嗜酸氧化亚铁硫杆菌和Fe³⁺单独或联合加入，都会使FeS₂出现明显的氧化还原峰，且嗜酸氧化亚铁硫杆菌可以降低FeS₂的氧化电位和缩短FeS₂氧化峰与还原峰之间的电位差，从而催化MnO₂浸出Mn²⁺的过程。

关键词: 微生物浸取, 催化作用, MnO₂的浸出速率, 电化学

Abstract: In the MnO₂-FeS₂-H₂SO₄ bacterial leaching system, the effects of acidithiobacillus ferrooxidans and Fe³⁺ alone or in combination on the leaching rate of Mn²⁺ from MnO₂ were studied. The catalysis of acidithiobacillus ferrooxidans and Fe³⁺ in the system was analyzed by the cyclic voltammetric method. Acidithiobacillus ferrooxidans and Fe³⁺ alone or in combination could effectively increase leaching rate of Mn²⁺, and have some catalytic effect on the bacterial leaching process of MnO₂. Electrochemical analysis showed that acidithiobacillus ferrooxidans and Fe³⁺ alone or in combination could cause obvious redox peaks of FeS₂, and acidithiobacillus ferrooxidans could reduce the oxidation potential of FeS₂ and decrease the difference in potential between FeS₂ oxidation peak and reduction peak, thus catalyzing leaching of Mn²⁺ from MnO₂.

Key words: microbial leaching, catalytic effect, leaching rate of MnO₂, electrochemistry

中图分类号:

TF18

张旭, 冯雅丽, 李浩然, 王维大. 微生物浸出MnO₂过程中嗜酸氧化亚铁硫杆菌与Fe³⁺的催化作用[J]. 化工学报, 2014, 65(8): 3159-3163.

ZHANG Xu, FENG Yali, LI Haoran, WANG Weida. Catalytic effect of acidithiobacillus ferrooxidans and Fe³⁺ on microbial leaching process of MnO₂[J]. CIESC Journal, 2014, 65(8): 3159-3163.

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微生物浸出MnO₂过程中嗜酸氧化亚铁硫杆菌与Fe³⁺的催化作用

Catalytic effect of acidithiobacillus ferrooxidans and Fe³⁺ on microbial leaching process of MnO₂

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