Abstract
Galvanic interactions between sulfide minerals have very important influences on hydrometallurgical processes, the supergene enrichment of sulfides and the formation of acid mine drainage. By changing the concentrations of Fe3 +, the pH values, status of the flowing of the solution and the solution salinity (e. g. the concentrations of Na2SO4) and monitoring the galvanic currents and potentials, studies were conducted in this work on the galvanic interaction between pyrite acting as the anode and galena acting as the cathode. The results indicated that the concentrations of Fe3 +, pH values and the flowing of the solution exhibit a great effect on the galvanic interaction of galena-pyrite couple, while the salinity of the solution has only a slight influence on the interaction. The experiments also revealed that in case cracks exist on the surface of pyrite electrode, the potential of pyrite will decrease so sharply as to be lower than that of galena under the same experimental condition. The experimental results were explained in terms of the Butler-Volume equation and the theory of mixed potential.
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References
Banks D., Younger P. L., Arnesen R. T., Lversen E. R., and Banks S. B. (1997) Mine-water chemistry: The good, the bad and the ugly [J].Environ. Geol. 32, 157–174.
Cao Chunan (2004)Principle of Corrosion Electrochemistry [M]. pp. 34–68. Chemical Industry Press, Beijing (in Chinese).
Cruz R., Bertrand V., Monroy M., and González I. (2001) Effect of Sulfide impurities on the reactivity of pyrite and pyretic concentrates: A multi-tool approach [J].Appl. Geochem. 16, 803–819.
da Silva G., Lastra M. R., and Budden J. R. (2003) Electrochemical passivation of sphalerite during bacterial oxidation in the presence of galena [J].Min. Eng. 16, 199–203.
Guo Hetong and Tan Qixian (2000)Electrochemistry Tutorial [M]. pp. 181–222. Tianjin University Press, Tianjin (in Chinese).
Holmes P. R. and Crandwell F. K. (1995) Kinetic aspects of galvanic interactions between minerals during dissolution [J].Hydrometallugy.39, 353–375.
Holmes P. R. and Crundwell F. K. (2000) The kinetics of the oxidation of pyrite by ferric ions and dissolved oxygen: An electrochemical study [J].Geochim. Cosmochim. Acta.64, 263–274.
Lasaga A. C. and Blum A. E. (1986) Surface chemistry, etch pits and mineral-water reactions [J].Geochim. Cosmochim. Acta.50, 2363–2379.
Li Heping (1995)Natural Primary Cells Geochemistry [D]. PhD Thesis, Central South University of Technology, Changsha (in Chinese with English abstract).
Li Heping, He Shaoxun, Xie Hongsen, Peng Ensheng, and Zhang Zhenru (1998) A new mechanism for pressure solution of electrically conductive minerals in shallow crust: A process of stress galvanic cell [J].Acta Mineralogica Sinica.18, 80–83 (in Chinese with English abstract).
Lin Z. (1997) Mineralogical and chemical characterization of wastes from the sulfuric acid industry in Falun, Sweden [J].Environ. Geol. 30(3/4), 152–162.
Lowson R. T. (1982) Aqueous oxidation of pyrite by molecular oxygen [J].Chem. Rev. 82, 461–497.
Madhuchhanda M., Devi N. B., Rao K. S., Rath P. C., and Paramguru R. K. (2000) Galvanic interaction between sulfide minerals and pyrolusite [J].J. Solid State Electrochem.5, 466–472.
Mckibben M. A. and Barnes H. L. (1986) Oxidation of pyrite in low temperature acidic solutions: Rate laws and surface textures [J].Geochim. Cosmochim. Acta.50, 1509–1520.
Naicker N., Cukrowska E., and McCarthy T. S. (2003) Acid mine drainage arising from gold mining activity in Johannesburg, South Africa and environs [J].Environ. Pollut. 122, 29–40.
Pecina-Treviño E. T., Uribe-Salas A., and Nava-Alonso F. (2003) Effect of dissolved oxygen and galvanic contact on the floatability of galena and pyrite with Aerophine 3418A [J].Miner. Eng. 16, 359–367.
Salomons W. (1995) Environmental impact of metals derived from mining activities: Processes, predictions, prevention [J].J. Geochem. Explor. 52, 5–23.
Sato M. (1992) Persistency-field Eh-pH diagrams for Sulfides and their application to supergene oxidation and enrichment of sulfide ore bodies [J].Geochim. Cosmochim. Acta.56, 3133–3156.
Shelp G. S., Chesworth W., and Spiers G. (1995) The amelioration of acid mine drainage by anin-situ electrochemical method-I. Employing scrap iron as the sacrificial anode [J].Appl. Geochem. 10, 705–713.
Shelp G. S., Chesworth W., and Spiers G. (1996) The amelioration of acid mine drainage by anin-situ electrochemical method; part 2: Employing aluminium and zinc as sacrificial anodes [J].Appl. Geochem. 11, 425–432.
Sikka D. B., Petruk W., Nehru C. E., and Zhang Z. (1991) Geochemistry of secondary copper minerals from Proterozoic porphyry copper deposit, Malanjkhand, India [J].Ore Geol. Rev. 6, 257–290.
Subrahmanyam T. V. and Forssberg K. S. E. (1993) Mineral solutioninterface chemistry in mineral engineering [J].Miner. Eng. 6, 439–454.
Sui C. C., Brienne S. H. R., Rao S. R., Xu Z., and Finch J. A. (1995) Metal ion production and transfer between sulphide minerals [J].Miner. Eng. 8, 1523–1539.
Thornber M. R. (1975a) Supergene alteration of sulphides, I. A chemical model based on massive nickel sulphide deposits at Kambald, Western Australia [J].Chem. Geol. 15, 1–14.
Thornber M. R. (1975b) Supergene alteration of sulphides, II. A chemical study of the Kambald nickel deposits [J].Chem. Geol. 15, 117–144.
Wang Jizhong, Li Shengrong, Jiang Yonghong, Wei Ruihua, and Niu Huapeng (2005) Environment properties of metallic minerals and their applications in environmental protection in China [J].Chinese Journal of Geochemistry.24, 221–227.
Xiao Jimei and Cao Chunan (2002)Principle of Materials Corrosion [M]. pp. 72–85. Chemical Industry Press, Beijing (in Chinese).
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This research was funded by the Science Innovation Program of the Chinese Academy of Sciences (Grant No. KZCX3-SW-124).
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Li, Z., Heping, L. & Liping, X. Galvanic interaction between galena and pyrite in an open system. Chin. J. Geochem. 25, 230–237 (2006). https://doi.org/10.1007/BF02840416
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DOI: https://doi.org/10.1007/BF02840416