JMMCE  Vol.8 No.8 , August 2009
Model for Predicting the Initial Solution pH at Pre-Assumed Final pH and Concentration of Dissolved Zinc during Leaching of Galena in Butanoic Acid Solution
Author(s) C. I. Nwoye*
ABSTRACT
Model for predicting the initial solution pH at pre-assumed final pH and concentration of dissolved zinc, during leaching of galena in butanoic acid solution has been derived. The model; α = 1.4γ/ln[(Zn) 1/3shows that the initial pH of the leaching is dependent on the values of the pre-assumed final solution pH and concentration of dissolved zinc. The validity of the model was rooted in the expression eN(γ/α) = 3√Zn where both sides of the expression were approximately equal to 4. The respective deviation of the model-predicted initial solution pH value from that of the corresponding experimental value was less than 2% which is quite within the acceptable deviation limit of experimental results.

Cite this paper
C. Nwoye, "Model for Predicting the Initial Solution pH at Pre-Assumed Final pH and Concentration of Dissolved Zinc during Leaching of Galena in Butanoic Acid Solution," Journal of Minerals and Materials Characterization and Engineering, Vol. 8 No. 8, 2009, pp. 621-633. doi: 10.4236/jmmce.2009.88054.
References
[1]   Bogue, R.G., Reynolds, R.R. (1951) Report on the Lead-Zinc Deposits of the Abakiliki District Ogoja Province, Nigeria (unpublished manuscripts).

[2]   Udum, J.T., (1998) Beneficiation Studies of Ishiagu Pb – Zn ore Trans SME/AIME 24(1):500

[3]   Okoro, C.C. (2004) Hydrometallurgical Extraction of Lead from Ishiagu Galena, B. Eng. Project Materials and Metallurgical Engineering Dept., Federal University of Technology Owerri.

[4]   Onyemaobi, O. O.(1990) Evaluation of Flotation Performance of Nigeria’s Sphalente (ZnS) Without Activation by copper. Ife Journal of Tech. 2(2):21-25.

[5]   Onyemaobi, O.O. Anyakwo, C.N. (1996) Factors Affecting the Performance of Nigeria’s Lead and Zinc Ores for Industrial Usage JSET, 3(1): 46.

[6]   Onyemaobi, O.O. (1990) Flotability of Ishiagu Galena as Raw Materials for Smelters. Nigeria Journal of Applied Science 8 (1): 93-101.

[7]   Agha, U.H. (1990) Role of PH on Flotation of Sphalerite from Ishiagu Lead-Zinc Ore, Nigeran Journal of Applied Science 2 (2):4-6.

[8]   Olubambi, P.A, Ndlovu, S., Potgieter, H., Borode, J.O. (2007) Effects of Ore Mineralogy on the Microbial Leaching of Low Grade Complex Sulphide Ore. Hydrometallurgy 86: 96-104.

[9]   Olubami, P.A., Borode, J.O., Ndlovu, S. (2006) Sulphuric Acid Leaching of Zinc and Copper from Nigerian Complex Sulphide Ore in the Presence of Hydrogen Peroxide. Journal of the Southern African Inst. Of Mining and Metallurgy 106: 765-769.

[10]   Nwoye, C. I. (2008) Ph.D Thesis, Metallurgical and Materials Engineering Department, Federal University of Technology, Owerri,178.

[11]   Haver, F.P., Wong, M. M. (1971) Recovering Elemental Sulfur from Non-Ferrous Minerals. Rep.Invest. U.S Bur. Mines 7474,20 in Orlowska L and Golab B; Microbial Leaching of Blende Flotation Concentrate using Acidithiobacillus Ferrooxidans and Acidithiobacillus Thiooxidans Physicochemical Problems of Mineral processing 37,1990,58.

[12]   Sklodowska, R. (1990) Microbial Leaching of Blende Flotation Concentrate using Acidithiobacillus Ferrooxidans and Acidithiobacillus Thiooxidans; Physico Chemical Problems of Mineral Processing 37:58.

[13]   Cwalina, W. (1994) Microbial Leaching of Blende Flotation Concentrate using Acidithiobacillus Ferrooxidans and Acidthiobacillus Thiooxidans Physicochemical Problems of Mineral Processing 37:58.

[14]   Makita, M., Esperon, M., Pereyra, B., Lopez, A., Orrantia, E. (2004) Reduction of Arsenic Content in a Complex Galena Concentrate by Acidithiobacillus Ferrooxidans; BioMed Central Biotechnology, 4:22 doi: 10.1186/1472-6750-6750-4-22 (published on line)

[15]   Williamson, S., Rimstidt, M., Smith, T., Schumate, H. (2005) Rates of Leaching in Single and Two Phase System. Min. mag., 3

[16]   Prosper, I. (2005) Acid leaching of lead sulphide, J. Med. Central. 3(4):13-16.

[17]   Rawlings, D.E. (2005) Characteristics and Adaptability of Iron and Sulphur Oxidizing Microorganisms Used for the Recovery of Metals from Minerals and Their Concentrates, Bio Med Central, 4:13 doi 10:1186/1475-2859-4-13 (published on line)

[18]   Dutrizac, J.E. (1986) The Dissolution of Galena in Ferric Chloride Media, Metallurgical Transactions B, 17B: 77.

[19]   Seon-Hyo, K. K., Henein, H., Warren, G.W (1986) An Investigation of the Thermodynamics and Kinetics of the Ferric Chloride Brine Leaching of Galena Concentrate. Metallurgical Transaction B, 17B:26.

[20]   Dix, R.B., Hendrix, J. L. (1986) Kinetics of Cl2-O2 Leaching of Lead–Zinc Flotation Concentrates. University of Nevada Reno, 89557

[21]   Pinches, A. (1975) Bacterial Leaching of an Arsenic Bearing Sulphide Concentrate. The Institute of Mining and Metallurgy, England, 34.

[22]   Nwoye, C. I. (2008) SynchroWell Research Work Report, DFM Unit, No 2008600, 15-28.

 
 
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