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Contributions of Microbial "Contact Leaching" to Pyrite Oxidation under Different Controlled Redox Potentials

文献类型：期刊论文

作者Dong, Bingxu1,2,3; Jia, Yan1,2; Tan, Qiaoyi1,2,4; Sun, Heyun1,2; Ruan, Renman1,2,4
刊名MINERALS
出版日期2020-10-01
卷号10期号:10页码:16
关键词pyrite bioleaching contact leaching controlled redox potential elemental sulfur inhibition microbial consortium
DOI10.3390/min10100856
英文摘要The function of microbial contact leaching to pyrite oxidation was investigated by analyzing the differences of residue morphologies, leaching rates, surface products, and microbial consortia under different conditions in this study. This was achieved by novel equipment that can control the redox potential of the solution and isolate pyrite from microbial contact oxidation. The morphology of residues showed that the corrosions were a little bit severer in the presence of attached microbes under 750 mV and 850 mV (vs. SHE). At 650 mV, the oxidation of pyrite was undetectable even in the presence of attached microbes. The pyrite dissolution rate was higher with attached microbes than that without attached microbes at 750 mV and 850 mV. The elemental sulfur on the surface of pyrite residues with sessile microorganisms was much less than that without attached microbes at 750 mV and 850 mV, showing that sessile acidophiles may accelerate pyrite leaching by reducing the elemental sulfur inhibition. Many more sulfur-oxidizers were found in the sessile microbial consortium which also supported the idea. The results suggest that the microbial "contact leaching" to pyrite oxidation is limited and relies on the elimination of elemental sulfur passivation by attached sulfur-oxidizing microbes rather than the contact oxidation by EPS-Fe.
WOS关键词THIOBACILLUS-FERROOXIDANS ; SURFACE-PROPERTIES ; SULFUR-COMPOUNDS ; FAM. NOV. ; GEN. NOV. ; KINETICS ; IRON ; MECHANISM ; MICROORGANISMS ; CHALCOPYRITE
资助项目National Natural Science Foundation of China[51674231] ; Key Research Program of Chinese Academy of Sciences[ZDRW-ZS-2018-1] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019A08]
WOS研究方向Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000586273300001
出版者MDPI
资助机构National Natural Science Foundation of China ; Key Research Program of Chinese Academy of Sciences ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences
源URL[http://ir.ipe.ac.cn/handle/122111/42522]  
专题中国科学院过程工程研究所
通讯作者Ruan, Renman
作者单位1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, State Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Dong, Bingxu,Jia, Yan,Tan, Qiaoyi,et al. Contributions of Microbial "Contact Leaching" to Pyrite Oxidation under Different Controlled Redox Potentials[J]. MINERALS,2020,10(10):16.
APA Dong, Bingxu,Jia, Yan,Tan, Qiaoyi,Sun, Heyun,&Ruan, Renman.(2020).Contributions of Microbial "Contact Leaching" to Pyrite Oxidation under Different Controlled Redox Potentials.MINERALS,10(10),16.
MLA Dong, Bingxu,et al."Contributions of Microbial "Contact Leaching" to Pyrite Oxidation under Different Controlled Redox Potentials".MINERALS 10.10(2020):16.

入库方式： OAI收割

来源：过程工程研究所

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