Study on heavy metals in vanadium tailings leaching from stone coal by Bacillus mucilaginosus

被引：0
|
作者：
Dong Y. [1 ,2 ]
Zhao Y. [1 ]
Lin H. [1 ,2 ]
Chong S. [1 ]
机构：
[1] School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing
[2] Beijing Key Laboratory of Resource-oriented Treatment of Industrial Typical Pollutants, Beijing
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 06期
基金：
中央高校基本科研业务费专项资金资助; 中国国家自然科学基金;
关键词：
Bacillus mucilaginosus; Heavy metals; Leaching rate; Microbial leaching; Stone coal vanadium tailings;
D O I：
10.11817/j.issn.1672-7207.2021.06.029
中图分类号：
学科分类号：
摘要：
The toxic metals V and Cu in vanadium tailings from stone coal were leached by Bacillus mucilaginosus (B.M. bacteria). The effects of different initial pH, dissolved oxygen, amount of sucrose added, leaching time and other factors on the leaching of metal vanadium and copper in the tailings of Bacillus mucilaginosus were studied. The results show that when the initial pH is 5-7, the leaching rates of V and Cu increase with the increase of initial pH. When the shake speed is 150-170 r/min, it is conductive to the leaching of V and Cu in the tailings. Under the conditions of initial pH of 7, the shaker speed of 170 r/min and the sucrose addition amount of 20 g/L, after 10 days of leaching tailings of B.M bacteria, the leaching rates of V and Cu reach 67.32% and 83.67% respectively. It is shown that B.M bacteria can effectively dissolve vanadium and copper in the tailings of vanadium extraction from stone coal. The B.M bacteria and their metabolites can destroy the mineral structure of tailings and effectively release heavy metals. © 2021, Central South University Press. All right reserved.
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页码：1992 / 2001
页数：9
相关论文
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