Model for Predictive Analysis of Heat Absorbed by Oxalic Acid Solution Relative to the Solution Temperature during Leaching of Iron Oxide Ore

DOI: 10.4236/jmmce.2009.87046   PDF   HTML     4,584 Downloads   5,567 Views   Citations


Model for predictive analysis of the quantity of heat absorbed by oxalic acid solution during leaching of iron oxide ore has been derived. It was observed that the validity of the model is rooted in the expression (lnQ)/N = √T where both sides of the relationship are correspondingly almost equal. The model was found to depend on the value of the final solution temperature measured during the experiment. The respective deviation of the model-predicted Q values from the corresponding experimental values was found to be less than 21% which is quite within the acceptable range of deviation limit of experimental results. The positive values of heat absorbed as obtained from experiment and model indicate and agree that the leaching process is endothermic in nature.

Share and Cite:

C. Nwoye, C. Nwobodo, C. Nlebedim, U. Nwoye, R. Umana and G. Obasi, "Model for Predictive Analysis of Heat Absorbed by Oxalic Acid Solution Relative to the Solution Temperature during Leaching of Iron Oxide Ore," Journal of Minerals and Materials Characterization and Engineering, Vol. 8 No. 7, 2009, pp. 531-539. doi: 10.4236/jmmce.2009.87046.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Sidhu, P.S., Gilkes, R. J., Cronell, R. M., Posner, A. M., Quirk, J.P. (1981) Dissolution of Iron Oxides and Oxydroxides in Hydrochloric and Perchloric Acids. Miner. 29, 269-276.
[2] Lim-Numez, R., Gilkes, R. J., (1987) Acid Dissolution of Metal-Containing Geothites and Haematites. Int. J. Miner. Process. 80, 144-152.
[3] Borghi, E. B., Regazzoni, A. E., Maroto, A. J. G., Blesa, M. A. (1989) Reductive Dissolution of Magnetite by Solution Containing EDTA and Fe(II). J. Colloid Interface Sci. 130(2), 299-310.
[4] Chiarizia, R., Horwitz, E. P., (1991) New Formulations of Iron Oxides Dissolution. Hydrometallurgy, 27, 339-360.
[5] Ambikadevi, V. R., Lalithambika, M., (2000) Effects of Organic Acids on Ferric Iron Removal from Iron-Stained Kaolinite. Appl. Clay Sci. 16, 133-145.
[6] Taxiarchour, M., Panias, D., Doumi, I., Paspaliaris, I., Kontopoulos, A. (1997a) Removal of iron from Silica Sand by Leaching with Oxalic Acid, Hydrometallurgy, 46, 215-227.
[7] Vaglio, F., Passariello, B., Barbaro, M., Plescia, P., Marbini, A. M. (1998) Drum Leaching Test in the Iron Removal from Quartz Using Oxalic Acid and Sulphuric Acids. Int. J. Miner. Process. 54,183.
[8] Segal, M. G., Sellers, R. M., (1984) In: Sykes, A.G. (Ed.), Advances in Inorganic and Bioinorganic Mechanisms, 1(3). Academic Press, London, 1984, p.97.
[9] Frenier, W. W., Growcock, F.B., (1984) Mechanism of Iron Oxide Dissolution, a Review of Recent Literature. Corrosion NACE, 40, pp. 663-668.
[10] Jepson, W.B., (1988) Structural Iron in Kaolinite and in Associated Ancillary Materials. In: Stucki, J. W., Goodman, B. A., Schwertmann, U. (Ed.), Iron in Soils and Clay Minerals. NATO ASI Ser, 217.D. Reidel Publ. Co., Dordrecht, Holland, pp. 467-536.
[11] Panias, D.,Taxiarchou, M., Paspaliaris, I., Kontopoulos, A. (1996) Mechanism of Dissolution of Iron Oxides in Aqueous Oxalic Acid. Hydrometallurgy 42, 257-265.
[12] Blesa, M. A., Morando, P. J., Regazzoni, A. E., (1994) Chemical Dissolution of Metal Oxides. CRC Press, Inc., pp. 269-308.
[13] Cornell, R. M.., Schindler, P. W.,(1987) Photochemical Dissolution of Geothite in Acid/Oxalate Solution. Miner. 35(5), 347-352.
[14] Lee, S.O., Tran, T., Park Y.Y., Kim S.J., and Kim, M. J. (2006) Study on the Kinetics of Iron Leaching by Oxalic acid. Int. J. Miner process, 80, 144-152.
[15] Mandal, S. K., Banerjee, P. C., (2004) Iron Leaching with Oxalic Acid: Effects of Different Physico-Chemical Parameters. Int. J. Miner. Process. 74, 263-270.
[16] Nwoye, C. I. (2008) Model for Quantitative Analysis of Dissolved Iron in Oxalic Acid Solution during Leaching of Iron Oxide Ore, Inter. Res. J. Eng. Sc. Tech., 5(1): 37-41.
[17] Nwoye, C. I. (2008) Model for Computational Analysis of Dissolved Haematite and Heat Absorbed by Oxalic Acid Solution during Leaching of Iron Oxide Ore, J. Eng.& App. Sc., 4, 22-25.
[18] Nwoye, C. I. (2005) SynchroWell Research Work Report, DFM Unit, No 2441162, 60-69.

comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.