Ravindra Pogaku and Bharathi K. Kodli and V. Prasarnth Raaj Veera Rao (2015) Effect of adaptation of acidothiobacillus ferrooxidans on ferrous oxidation and nickel leaching efficiency. Advances in Bioprocess Technology. pp. 17-26.
|
Text
Effect of adaptation of acidothiobacillus ferrooxidans on ferrous oxidation and nickel leaching efficiency.pdf Download (94kB) | Preview |
Abstract
Studies were carried out on ferrous oxidation and bacterial leaching of copper flotation concentrate to selectively leach nickel by two strains of Acidothiobacillus ferrooxidans. However, slower growth rates of these strains have led to prolonged lag periods during leaching process with low nickel recovery. Hence, attempts were made to adapt these strains to high concentrations of copper salt, nickel salt, mixture of copper and nickel salts and flotation concentrate which would facilitate the preferential leaching of Ni containing pentlandite phase from a floatation concentrate with chalcopyrite phase in predominance. When unadapted strains of Tf were replaced with adapted strains, the lag period during leaching process was drastically declined with immediate resurgence of pH fall indicating biologically produced acid. Cells adapted to metals and concentrate has shown positive effect on oxidizing ability of pyrite and nickel leaching efficiency. Unadapted Tf-44 and Tf-231 strains have shown selective leaching of nickel (55% and 49.7%) while the leachabilities obtained with adapted strains were 80% and 83.5% respectively.
| Item Type: | Chapter In Book |
|---|---|
| Keyword: | Acidothiobacillus ferrooxidans , Bacterial leaching , Copper flotation , Ferrous oxidation , Leaching process , Nickel leaching , Oxidizing ability , Selective leaching |
| Subjects: | T Technology > TN Mining engineering. Metallurgy |
| Department: | FACULTY > Faculty of Engineering |
| Depositing User: | NORAINI LABUK - |
| Date Deposited: | 20 Jun 2018 08:25 |
| Last Modified: | 20 Jun 2018 08:25 |
| URI: | https://eprints.ums.edu.my/id/eprint/20196 |
Actions (login required)
 |
View Item |