Materials Science and Metallurgy Engineering
ISSN (Print): 2373-3470 ISSN (Online): 2373-3489 Website: Editor-in-chief: Apply for this position
Open Access
Journal Browser
Materials Science and Metallurgy Engineering. 2014, 2(1), 5-10
DOI: 10.12691/msme-2-1-2
Open AccessArticle

Kinetics of Leaching of Iron Oxide in Clay in Oxalic Acid and in Hydrochloric Acid Solutions

U K Sultana1, Fahmida Gulshan1 and A S W Kurny1,

1Department of Materials and Metallurgical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh

Pub. Date: February 11, 2014

Cite this paper:
U K Sultana, Fahmida Gulshan and A S W Kurny. Kinetics of Leaching of Iron Oxide in Clay in Oxalic Acid and in Hydrochloric Acid Solutions. Materials Science and Metallurgy Engineering. 2014; 2(1):5-10. doi: 10.12691/msme-2-1-2


Iron oxide in samples of clay containing 8.15% iron oxide was leached in aqueous oxalic acid and hydrochloric acid solutions. Leaching experiments were conducted in the temperature range of 40–80°C for times up to 90 minutes in 0.2 M to 2 M acid solutions. The mixed kinetic mechanism seemed to be the most appropriate model to fit the kinetic data of leaching in oxalic acid while product layer diffusion controlled reaction model seemed to be the most appropriate one for leaching in hydrochloric acid. The Arrhenius activation energy for leaching in oxalic acid was found to be 41.035 kJ/mole while that for hydrochloric acid was 50.82 kJ/mole.

clay washing iron oxide leaching oxalic acid hydrochloric acid kinetic model activation energy

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit


[1]  J. A. Lori, A.O.Lawal and E.J. Ekanem, Characterization and optimisation of deferration of Kankara clay, 2007. ARPN Journal of Engineering and Applied Sciences, 2 (2005) 60-72.
[2]  S. C. Baral, S. R. Das, S. N. Ghosh. Physico-chemical characterization of Maghalaya clays for use in ceramics. Transactions of Indian Ceramic Society, Vol. 52 (1993) 176-182.
[3]  S K Mukherji, B B Machhoya, A. K. Chakraborty, T K Dan. A study on the beneficiation of some crude china clays of Gujarat, Research and Industry, 38 (1993) 254-259.
[4]  F. Veglio, B. Passariello, M. Barbaro, P. Plescia, A.M. Marabini, Drum leaching tests in iron removal from quartz using oxalic and sulphuric acids, Int. J. Miner. Process, 54 (1998) 183-200.
[5]  Suong Oh Lee, Tam Tran, Yi Yong Park, Seong Jun kim, MyongJun Kim. 2006. Study on the kinetics of Iron oxide leaching by oxalic acid, Int. J. Miner. Process, 80 (2006) 144-152.
[6]  R. Chiarizia, E.P. Horwitz, New formulations for iron oxides dissolution, Hydrometallurgy 27 (1991) 339-360.
[7]  D. Panias, M. Taxiarchou, I. Paspaliaris, A. Kontopoulos, Mechanisms of dissolution of Iron Oxides in aqueous oxalic acid solution, Hydrometallurgy, 42 (1996) 257-265.
[8]  Sung Oh Lee, Tam Tran, Byoung Hi Jung, Seong Jun Kim, Myong Jun Kim, Dissolution of Iron oxide using oxalic acid. Hydrometallurgy, 87 (2007) 91-99.
[9]  V.R. Ambikadevi, M. Lalithambika, Effect of organic acids on ferric iron removal from iron stained kaolinite. Applied Clay Science 16 (2000) 133-145.
[10]  Gulsemin Gulfen, Mustafa Gulfen, Ali Osman Aydin, Dissolution Kinetics of iron from diasporic bauxite in hydrochloric acid solution, Indian Journal of Chemical Technology, 13 (2006) 386-390.
[11]  Alafara, A. Baba; Adekola, F A; Folashade, A. O., Quantitative Leaching of a Nigerian Iron Ore in Hydrochloric Acid. J. Appl. Sci. Environ. Mgt. 9 (2005) 15-20.
[12]  P. S. Sidhu, R. J. Gilkes, R. M. Cornell, A. M. Posner, J. P. Quirk, Dissolution of iron oxides and oxyhydroxides in hydrochloric and perchloric acids, Clays Clay Miner, 29 (1981) 269-276.
[13]  O. Levenspiel, Chemical Reaction Engineering, Third edition, John Wiley & Sons, New York, 1999.
[14]  Ray, H.S., Kinetics of Metallurgical Reactions, Oxford & IBH Publishing Company, India 1993.
[15]  J. Bassett, R. C. Denney, G. H. Jeffery, J. Mendham, Vogel’s text book of Quantitative Inorganic Analysis including elementary instrumental analysis, Fourth edition, pp. 743, 1978.