Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum

doi:10.1016/j.hydromet.2017.12.003

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	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
刊名	HYDROMETALLURGY
	2018
卷号	176 页码:9-16
关键词	Galvanic Interaction Acidithiobacillus-ferrooxidans Electrochemical Dissolution Iron Oxidation Chalcopyrite Flotation Behavior Spectroscopy Chalcocite Minerals
ISSN号	0304-386X
DOI	10.1016/j.hydromet.2017.12.003
文献子类	期刊论文
英文摘要	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.
语种	英语
WOS记录号	WOS:000428227300002
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/29157]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017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
推荐引用方式 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.