Abstract
Clay samples containing 8.15% iron oxides and 27.49% alumina were leached in oxalic acid. Leaching experiments were performed in aqueous solutions of oxalic acid of 0.2–2 mol/L at 40–80°C for up to 90 min. The mixed kinetic mechanism, i.e., t/τ=[(1–2X/3)−(1−X)2/3]+b[1−(1−X)1/3], seemed to be the most appropriate one to fit the kinetic data of leaching iron oxides contained in clay in the aqueous oxalic acid solutions. The Arrhenius activation energy for leaching in the 1.8 mol/L oxalic acid was found to be 41.035 kJ/mol.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
J.A. Lori, A.O. Lawal, and E.J. Ekanem, Characterization and optimisation of deferration of Kankara clay, ARPN J. Eng. Appl. Sci., 2(2007), No.5, p.60.
S.C. Baral, S.R. Das, and S.N. Ghosh, Physico-chemical characterization of Meghalaya clays for use in ceramics, Trans. Indian Ceram. Soc., 52(1993), No.5, p.176.
S.K. Mukherji, B.B. Machhoya, A.K. Chakraaborty, and T.K. Dan, A study on the beneficiation of some crude china clays of Gujarat, Res Ind, 38(1993), p.254.
F. Veglió, B. Passariello, M. Barbaro, P. Plescia, and A.M. Marabini, Drum leaching tests in iron removal from quartz using oxalic and sulphuric acids, Int. J. Miner. Process., 54(1998), No.3–4, p.183.
S.O. Lee, T. Tran, Y.Y. Park, S.J. Kim, and M.J. Kim, Study on the kinetics of Iron oxide leaching by oxalic acid, Int. J. Miner. Process., 80(2006), No.2–4, p.144.
R. Chiarizia and E.P. Horwitz, New formulations for iron oxides dissolution, Hydrometallurgy, 27(1991), No.3, p.339.
D. Panias, M. Taxiarchou, I. Paspaliaris, and A. Kontopoulos, Mechanisms of dissolution of iron oxides in aqueous oxalic acid solution, Hydrometallurgy, 42(1996), No.2, p.257.
S.O. Lee, T. Tran, B. H. Jung, S.J. Kim, and M.J. Kim, Dissolution of Iron oxide using oxalic acid, Hydrometallurgy, 87(2007), No.3–4, p.91.
V.R. Ambikadevi and M. Lalithambika, Effect of organic acids on ferric iron removal from iron stained kaolinite, Appl. Clay Sci., 16(2000), p.133.
G. Gülfen, M. Gülfen, and A.O. Aydin, Dissolution Kinetics of iron from diasporic bauxite in hydrochloric acid solution, Indian J Chem Technol, 13(2006), p.386.
A.B. Alafara, F.A. Adekola, and A.O. Folashade, Quantitative leaching of a nigerian iron ore in hydrochloric acid, J. Appl. Sci. Environ. Manage., 9(2005), No.3, p.15.
O. Levenspiel, Chemical reaction engineering, Third edition, John Wiley & Sons., New York, 1998, p.566.
H.S. Ray, Kinetics of Metallurgical Reactions, Oxford & IBH Publishing, India, 1993, p.17.
I. Vogel, Textbook of Quantitative Inorganic Analysis, Fourth Ed., Edited by J. Bassett, R.C. Denney, G.H. Jeffery, and J. Mendham, Longman Sci. & Tech., Essex, 1978, p.743.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sultana, U.K., Kurny, A.S.W. Dissolution kinetics of iron oxides in clay in oxalic acid solutions. Int J Miner Metall Mater 19, 1083–1087 (2012). https://doi.org/10.1007/s12613-012-0674-3
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12613-012-0674-3