Issue

Vol. 24 No. 3 (2012): Vol 24 Issue 3

Dissolution Kinetics of Columbite in Nitric Acid

Olushola S. Ayanda
Department of Chemistry, Faculty of Applied Sciences, Cape Peninsula University of Technology, P.O. Box 1906, Cape Town, South Africa
Folahan A. Adekola
Department of Chemistry, University of Ilorin, P.M.B 1515, Ilorin, Nigeria
Olalekan S. Fatoki
Department of Chemistry, Faculty of Applied Sciences, Cape Peninsula University of Technology, P.O. Box 1906, Cape Town, South Africa

Corresponding Author(s) : Olushola S. Ayanda

osayanda@gmail.com

Asian Journal of Chemistry, Vol. 24 No. 3 (2012): Vol 24 Issue 3

Abstract

An investigation of the dissolution kinetics of a Nigerian columbite mineral ore sample in nitric acid media has been undertaken. The effects of acid concentration, process temperature, stirring rate and particle size on the dissolution rate were also investigated. Experimental results indicated that columbite dissolution was greatly influenced by hydrogen ion concentration and the leaching data fitted a diffusion model. Values of 15.100 kJ mol-1 and 9.42 × 10-5 min-1 were obtained for the activation energy and Arrhenius constant of columbite dissolution in nitric acid respectively and the order of reaction was 0.35.

Keywords

Columbite Kinetics Nitric acid Activation energy and arrhenius constant
S. Ayanda, O., A. Adekola, F., & S. Fatoki, O. (2011). Dissolution Kinetics of Columbite in Nitric Acid. Asian Journal of Chemistry, 24(3), 1087–1090. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/8715
Download Citation
Endnote/Zotero/Mendeley (RIS)
BibTeX
Author biographies is not available.
Download
PDF
Statistic
Read Counter : 0 Download : 0