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EFFECT OF AS3+ AND AS5+ ON THIOBACILLUS-FERROOXIDANS - CONSEQUENCES FOR THE BIOLOGICAL PRETREATMENT OF GOLD AND SILVER-BEARING ARSENOPYRITE CONCENTRATES
Alternative TitleBiorecovery
XIANG, L; KE, JJ; QIU, RQ
1994
Source PublicationBIORECOVERY
ISSN0269-7572
Volume2Issue:4Pages:241-251
AbstractThe effect of As3+ and As5+ on Thiobacillus ferrooxidans was investigated in the laboratory using a shake flask technique. Results of Fe2+ oxidation in nutrient media containing different initial amounts of As3+ of As5+ show that Fe2+ is completely oxidized by thiobacillus ferrooxidans within 60 hours when no arsenic is present in the medium. Addition of As3+ and As5+ allows the determination of different inhibition effects on Thiobacillus ferrooxidans. As3+ is more toxic than As5+. As3+ content in the leachate decreases gradually due to Fe3+. The Thiobacillus ferrooxidans used can tolerate about 8 g/l As5+, but only 2.5 g/l As3+. The results of ore pretreatment indicates that arsenic is released from arsenopyrite initially as As3+, and then As3+ is oxidized to As5+ by Fe3+. The effect of total arsenic content on the bioleaching results of sulphide ores is discussed.; The effect of As3+ and As5+ on Thiobacillus ferrooxidans was investigated in the laboratory using a shake flask technique. Results of Fe2+ oxidation in nutrient media containing different initial amounts of As3+ of As5+ show that Fe2+ is completely oxidized by thiobacillus ferrooxidans within 60 hours when no arsenic is present in the medium. Addition of As3+ and As5+ allows the determination of different inhibition effects on Thiobacillus ferrooxidans. As3+ is more toxic than As5+. As3+ content in the leachate decreases gradually due to Fe3+. The Thiobacillus ferrooxidans used can tolerate about 8 g/l As5+, but only 2.5 g/l As3+. The results of ore pretreatment indicates that arsenic is released from arsenopyrite initially as As3+, and then As3+ is oxidized to As5+ by Fe3+. The effect of total arsenic content on the bioleaching results of sulphide ores is discussed.
SubtypeArticle
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
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Indexed BySCI
Language英语
WOS Research AreaBiotechnology & Applied Microbiology ; Environmental Sciences & Ecology
WOS SubjectBiotechnology & Applied Microbiology ; Environmental Sciences
WOS IDWOS:A1994QY93000003
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Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8005
Collection研究所(批量导入)
Affiliation1.CHINESE ACAD SCI,INST CHEM MET,BEIJING,PEOPLES R CHINA
2.CHINESE ACAD SCI,INST MICROBIOL,BEIJING,PEOPLES R CHINA
Recommended Citation
GB/T 7714
XIANG, L,KE, JJ,QIU, RQ. EFFECT OF AS3+ AND AS5+ ON THIOBACILLUS-FERROOXIDANS - CONSEQUENCES FOR THE BIOLOGICAL PRETREATMENT OF GOLD AND SILVER-BEARING ARSENOPYRITE CONCENTRATES[J]. BIORECOVERY,1994,2(4):241-251.
APA XIANG, L,KE, JJ,&QIU, RQ.(1994).EFFECT OF AS3+ AND AS5+ ON THIOBACILLUS-FERROOXIDANS - CONSEQUENCES FOR THE BIOLOGICAL PRETREATMENT OF GOLD AND SILVER-BEARING ARSENOPYRITE CONCENTRATES.BIORECOVERY,2(4),241-251.
MLA XIANG, L,et al."EFFECT OF AS3+ AND AS5+ ON THIOBACILLUS-FERROOXIDANS - CONSEQUENCES FOR THE BIOLOGICAL PRETREATMENT OF GOLD AND SILVER-BEARING ARSENOPYRITE CONCENTRATES".BIORECOVERY 2.4(1994):241-251.
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