Leaching of Sphalerite with Hydrogen Peroxide and Nitric Acid


The leaching of powdered sphalerite using hydrogen peroxide and nitric acid has been investigated. The important variables such as concentrations of hydrogen peroxide and nitric acid as well as stirring speed and particle size were examined. The effect of reaction temperature was also examined on the leaching reaction process. The hydrogen peroxide and nitric acid concentrations have significant effects on the leaching of sphalerite. The leaching of sphalerite is dependent on temperature and stirring speed and inversely proportional on the ore particle size. The apparent activation energy is found to be 28.7kJmol-1 suggesting that the reaction is chemical - control at the surface of the particles.

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A. Adebayo, K. Ipinmoroti and O. Ajayi, "Leaching of Sphalerite with Hydrogen Peroxide and Nitric Acid," Journal of Minerals and Materials Characterization and Engineering, Vol. 5 No. 2, 2006, pp. 167-177. doi: 10.4236/jmmce.2006.52012.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Nickel, E.H and Grice, J.D. (1998) The IMA commission on new minerals and mineral names:Procedures and guidelines on mineral nomenclature, The Canadian Mineralogist Vol. 36, pp. 10-20.
[2] Palachy, J. (1997), US Geological Survey, Minerals National Information Centre Reston VA 20192 USA
[3] Jena, P. K. and Brocchi, E. A. (1992);Extraction of copper from salobo (Bazil) Chalcopyrite concentrate and aqueous slurries thereof by chlorination with chlorine gas; Trans Instn. Min. Mettall (Sec C: mineral Processing Ext. metal), 101 (Jan. – April 1992).
[4] Peters,E (1973) The physical chemistry of hydrometallurgy, in proceeding of international symposium on hydrometallurgy, Chicago, D.J.I Evans and R.S. Shoemaker, (eds) chapter 10, 227-230.
[5] Ekinci,Z, Colack,S, Cakici,A, Sarac,H. (1998) Mineral Engineering. 11,(3) 287.
[6] Cotton, F.A. and Wilkinson, G. (1980)Advanced Inorganic Chemistry A Comprehensive Text, John Wiley & Sons, New York p.304.
[7] Allimarin, I.P., Fadeeva, V.I. and Dorokha, (Translation Ad. Boris Spivakov) E.N (1976) Lecture Experiments in Analytical Chemistry, Mir, Publishers, Moscow p. 96.
[8] Furman, N.H. (1963) Standard Method of Chemical Analysis, D. Van Nostrand Comp. Inc. New York p. 234.
[9] Copur,M. (2001)Chem. and Biochem. Eng. Quart. (4) 181.
[10] Dimitrijevic, M. Antonijeviv, M.M., Dimitrivijeviv, V.(1999) Investigation of the kinetics of pyrite oxidation by hydrogen peroxide in hydrochloric acid solutions. Mineral Engineering, 12, 2, 165 – 174.
[11] Wood, C.W., Holliday, A.K (1976) Inorganic Chemistry: An Intermediate Text, Butterworth & Co, England, 218 -221.
[12] Levenspiel, O (1972) Chemical Reaction Engineering, John Wiley, NY (2nd Ed.), pp.375.
[13] Shon, H.Y., Wadsworth, M.E. (1979) Rate Process in Extractive Metallury, PlenumPress, New York, pp. 133 – 186.
[14] Glastonbury, J.R. (1968) Kinetics in Gibbsite extraction, in Advances in Extractive Metallurgy, Institute of Mining and Metallurgy, London, pp.908 – 917
[15] McKibben, M.A. (1984) PhD Thesis, Pennsylvania State University.
[16] Harvey, J.T. Tai Yen, W. Paterson, J.G. (1993) A kinetic investigation into the pressure oxidation of sphalerite from a complex concentrate. Mineral Engineering, 6: 949 – 967.
[17] Mohan,N.P. and Biswas, A.K. (1971) Kinetics of dissolution of copper(II) sulphide in aqueous sulphuric acid solutions, J. applied Chemistry and Biotechnology,21, 15-18.
[18] Gosh,A., Ray, H.S. (1991) Principles of Extractive Metallurgy (2nd edition) Willey Eastern Ltd. New Delhi P.14.
[19] Olanipekun, E.I. (1999) A kinetic study of the leaching of a Nigerian ilmenite ore by hydrochloric acid, Hydrometallurgy, (53 ),1 - 10.
[20] Biswas, A. K (ed.), (1991) Frontiers in applied chemistry (2nd edn.) Narosa Publishing House, New Delhi, P. 39

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