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- W2773072022 abstract "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 bornite. Furthermore, the dissolution of bornite 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." @default.
- W2773072022 created "2017-12-22" @default.
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- W2773072022 date "2018-03-01" @default.
- W2773072022 modified "2023-10-16" @default.
- W2773072022 title "Synergetic effect of pyrite on strengthening bornite bioleaching by Leptospirillum ferriphilum" @default.
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- W2773072022 doi "https://doi.org/10.1016/j.hydromet.2017.12.003" @default.
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