Journal
HYDROMETALLURGY
Volume 169, Issue -, Pages 41-46Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.hydromet.2016.12.007
Keywords
Indigenous; Exogenous; Oxide-sulfide ore; Bioleaching; Energy substrate
Categories
Funding
- National High Technology Research and Development Program (863 program) [2012AA061502]
- Natural Science Foundation of China (NSFC) [31170111]
- Fundamental Research Funds for the Central Universities of Central South University [2016zzts110]
Ask authors/readers for more resources
Bioleaching has been widely applied to recover sulfide minerals, however, little is known about the bioleaching behavior and mechanism of mixed oxide-sulfide copper ore with high-oxidative ratio. The leaching efficiency of artificial indigenous and exogenous microbial communities on a mixed oxide-sulfide copper ore with and without energy substrate was investigated. The results indicated that extra energy substrate was needed when bioleaching was applied to this kind of ore. The variation of leaching parameters caused by indigenous community was inferior to that caused by exogenous ones due to its lower activity. The leaching efficiency of sulfide part induced by indigenous strains was superior to that induced by exogenous ones, due to the stronger colonization ability of indigenous strains. It verified that both microbial activity and colonization ability were important properties affecting leaching efficiency. Sulfur oxidizers, which can oxidize sulfur or polysulfide formed on mineral surface and decrease leachate pH, played a more important role than ferrous oxidizers in bioleaching of high-oxidative oxide-sulfide ore. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available