CAS OpenIR  > 湿法冶金清洁生产技术国家工程实验室
Influence of Mg2+ on the growth and activity of sulfate reducing bacteria
Cao, Jun-Ya1; Zhang, Guang-ji1,2; Mao, Zai-sha1; Fang, Zhao-heng1; Yang, Chao1,2; Han, Bao-ling2; Zhang, GJ
2009
Source PublicationHYDROMETALLURGY
ISSN0304-386X
Volume95Issue:1-2Pages:127-134
AbstractBioleaching liquors usually contain low concentration valuable metals and a major impurity (magnesium or calcium), and therefore it is a heavy burden and involves a complicated process to separate and enrich valuable metals from these liquors. An alternative process of selective precipitation of metals using H2S produced by sulfate reducing bacteria (SRB) is put forward. In this paper, sealed flasks were used to study the influence of Mg2+ in the form of MgCl2 center dot 6H(2)O and MgSO4 center dot 7H(2)O on the growth and activity of SRB, and the sulfide precipitation of bioleaching liquors was also studied. The experimental results show that Mg2+ ion concentration from MgCl2 center dot 6H(2)O or MgSO4 center dot 7H(2)O is a significant and favorable factor for SRB growth and activity. It is also demonstrated that enhanced activation of SRB by adding NaCl in liquor and the SRB have a high tolerance to salinity from NaCl. Adding MgSO4 center dot 7H(2)O provides a predominant condition for SRB growth, due to providing higher concentration of sulfate. The sulfide precipitation and separation of magnesium with H2S produced by SRB is found to be mainly dependent on the pH value and the H2S concentration. SRB culture solution can effectively precipitate Cu2+, Ni2+ and Fe3+ from synthetic leaching liquor in 2 min, while Mg2+ ions remain in the liquid phase. (C) 2008 Elsevier B.V. All right reserved.
KeywordSulfate Reducing Bacteria Magnesium Ionic Concentration Salinity Precipitation
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.hydromet.2008.05.006
Indexed BySCI
Language英语
WOS KeywordACID-MINE DRAINAGE ; ANAEROBIC DEGRADATION ; BED REACTOR ; BIOHYDROMETALLURGY ; CULTURES ; BIOREMEDIATION ; SOLUBILIZATION ; CEMENTATION ; CONCENTRATE ; OXIDATION
WOS Research AreaMetallurgy & Metallurgical Engineering
WOS SubjectMetallurgy & Metallurgical Engineering
WOS IDWOS:000262156300021
Citation statistics
Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6780
Collection湿法冶金清洁生产技术国家工程实验室
Corresponding AuthorZhang, GJ
Affiliation1.Chinese Acad Sci, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Natl Key Lab Biochem Engn, Inst Proc Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Cao, Jun-Ya,Zhang, Guang-ji,Mao, Zai-sha,et al. Influence of Mg2+ on the growth and activity of sulfate reducing bacteria[J]. HYDROMETALLURGY,2009,95(1-2):127-134.
APA Cao, Jun-Ya.,Zhang, Guang-ji.,Mao, Zai-sha.,Fang, Zhao-heng.,Yang, Chao.,...&Zhang, GJ.(2009).Influence of Mg2+ on the growth and activity of sulfate reducing bacteria.HYDROMETALLURGY,95(1-2),127-134.
MLA Cao, Jun-Ya,et al."Influence of Mg2+ on the growth and activity of sulfate reducing bacteria".HYDROMETALLURGY 95.1-2(2009):127-134.
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