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Brazilian Journal of Chemical Engineering

versão impressa ISSN 0104-6632


SAHU, S.; KAVURI, N. C.  e  KUNDU, M.. Dissolution kinetics of nickel laterite ore using different secondary metabolic acids. Braz. J. Chem. Eng. [online]. 2011, vol.28, n.2, pp.251-258. ISSN 0104-6632.

The dissolution kinetics of nickel laterite ore in aqueous acid solutions of three metabolic acids, i.e., citric acid, oxalic acid and acetic acid were investigated in a batch reactor individually. It was determined that experimental data comply with a shrinking core model. The diffusion coefficients for citric acid, oxalic acid and acetic acid were found to be 1.99×10-9 cm2/s, 2.59×10-8 cm2/s and 1.92×10-10 cm2/s respectively. The leaching ability of each acid was observed and it was found that oxalic acid was better than the other two.

Palavras-chave : Dissolution kinetics; Laterite ore; Leaching; Pseudomonas putida.

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