Enhancing the Leaching of Chalcopyrite Using Acidithiobacillus ferrooxidans under the Induction of Surfactant Triton X-100

摘要: Chalcopyrite is the richest copper sulfide mineral in world, but it also most resistant to biohydrometallurgical processing. To promote bioleaching of chalcopyrite, a nonionic surfactant, t-octyl phenoxy polyethoxy ethanol (Triton X-100), was employed this paper. Action Triton X-100 chalcopyrite leaching using Acidithiobacillus ferrooxidans explored shake flasks. Results showed that 30 mg·L−1 increased yield by 42.21% compared process without additive after 24 days. Under stress X-100, efficiency slightly dropped at an early stage, remarkably afterwards. XRD and XPS analysis leach residues demonstrated potassium jarosite elemental sulfur resulted surface passivation. Surfactant appeared induce oxidation bacteria owing increase hydrophobicity. These results suggest itself has no ability under its induction, can be enhanced due removal passivation layer.