Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum
Wang, XX; Liao, R; Zhao, HB; Hong, MX; Huang, XT; Peng, H; Wen, W; Qin, WQ; Qiu, GZ; Huang, CM; Wang, J
2018
发表期刊HYDROMETALLURGY
ISSN0304-386X
卷号176页码:9-16
文章类型期刊论文
摘要Bioleaching experiments and electrochemical measurements were conducted to investigate the effect of pyrite on bornite bioleaching by Leptospirillum ferriphilum. Bioleaching experiments results showed that the addition of pyrite increased the redox potential to 360 mV vs. an Ag/AgCl electrode in the initial period of bioleaching process. The presence of pyrite significantly increased the copper extraction efficiency to 95.9% while the extraction value was only 19% without pyrite addition after 20 days. Furthermore, the addition of pyrite also decreased the consumption of acid during bioleaching of bornite. Especially, the total acid consumption was only 0.002 mmol at a pyrite to bornite ratio of 5:1 while the value was 2.842 mmol without pyrite addition. The results of electrochemical experiments identified that a galvanic effect existed between bornite and pyrite, and bornite was more prone to oxidation sand reduction. Tafel plot and galvanic corrosion tests indicated that the addition of pyrite accelerated the dissolution of bomite. Furthermore, the dissolution of bomite with pyrite additon was not inhibited by the formation of element sulfur and jarosite that may lead to passivation of chalcopyrite bioleaching. Based on all the observations, a mechanism model on how pyrite accelerated bornite dissolution is proposed.
关键词Galvanic Interaction Acidithiobacillus-ferrooxidans Electrochemical Dissolution Iron Oxidation Chalcopyrite Flotation Behavior Spectroscopy Chalcocite Minerals
DOI10.1016/j.hydromet.2017.12.003
收录类别SCI
语种英语
WOS记录号WOS:000428227300002
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29157
专题中科院上海应用物理研究所2011-2018年
作者单位1.Wang, XX
2.Liao, R
3.Zhao, HB
4.Hong, MX
5.Huang, XT
6.Peng, H
7.Wen, W
8.Qin, WQ
9.Qiu, GZ
10.Huang, CM
11.Wang, J
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GB/T 7714
Wang, XX,Liao, R,Zhao, HB,et al. Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum[J]. HYDROMETALLURGY,2018,176:9-16.
APA Wang, XX.,Liao, R.,Zhao, HB.,Hong, MX.,Huang, XT.,...&Wang, J.(2018).Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum.HYDROMETALLURGY,176,9-16.
MLA Wang, XX,et al."Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum".HYDROMETALLURGY 176(2018):9-16.
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