Pina, Pablo dos SantosLeão, Versiane AlbisSilva, Carlos Antônio daDaman, DominiqueFrenay, Jean2012-08-062012-08-062005PINA, P. S. et al. The effect of ferrous and ferric iron on sphalerite bioleaching with Acidithiobacillus sp. Minerals Engineering, v. 18, n. 5, p. 549–551, abr. 2005. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0892687504002109>. Acesso em: 06 ago. 2012.08926875http://www.repositorio.ufop.br/handle/123456789/1252Bioleaching has gained increased interest as an alternative for processing zinc sulfide ores without the generation of SO2. The bioleaching of sphalerite with mesophile microorganisms at 1% pulp density has been studied. Batch experiments were carried out at 34 °C and 200 rpm. The effects of pH, concentration of Fe(II), as well as the presence of Fe(III) in the zinc extraction were assessed. Fast zinc dissolution can be achieved working with Acidithiobacillus sp. The best pH for bioleaching is in the 1.75–2.00 range and the presence of Fe(III) has a strong influence in zinc extraction, increasing the rate of dissolution and does not adversely affect the growth of the Acidithiobacillus population.en-USBioleachingSulphide oresBiooxidationArtigo publicado em periodicoO periódico Minerals Engineering concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3337021067411.