Semiconductor-Microbial Mechanism of Selective Dissolution of Chalcocite in Bioleaching.

ABSTRACT: Chalcocite-dominant secondary copper ore with a high pyrite content had a rapidly increased iron concentration in the middle and later periods of bioleaching, which increased the difficulty of separating copper and iron ions in the leaching solution. In the two aspects of microbial community succession and energy band theory, the selective dissolution mechanism of chalcocite in this type of copper ore was analyzed and illustrated using experiments and first-principles calculations. The results showed that controlling the solution potential at a lower level was beneficial to the selective leaching of chalcocite, while bacteria promoted the leaching of pyrite and chalcocite simultaneously by oxidizing Fe2+ to Fe3+ in the solution. Below 700 mV of solution potential, the bacterial community,

SUBMITTER: Wu B 

PROVIDER: S-EPMC6844112 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature