Publicação: Estudo da oxidação dos sulfetos sintéticos molibdenita (MoS2) e covelita (CuS) por Acidithiobacillus ferrooxidans via respirometria celular
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Data
2009-01-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
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Editor
Sociedade Brasileira de Química
Tipo
Artigo
Direito de acesso
Acesso aberto
Resumo
This paper analyses the oxidation of covellite and molybdenite by Acidithiobacillus ferrooxidans strain LR using respirometric experiments. The results showed that both sulfides were oxidized by A. ferrooxidans, however, the covellite oxidation was much higher than molybdenite. Regarding the kinetic oxidation, the findings revealed that just molybdenite oxidation followed the classical Michaelis-Menten kinetic. It is probably associated with the pathway which these sulfides react to chemistry-bacterial attack, what is influenced by its electronic structures. Besides, experiments conducted in the presence of Fe3+ did not indicate alterations in molybdenite oxidation. Thus, ferric ions seem not to be essential to the sulfide oxidations.
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Português
Como citar
Química Nova. Sociedade Brasileira de Química, v. 32, n. 6, p. 1477-1481, 2009.
