Corrosive electrochemistry of jamesonite by cyclic voltammetry

Abstract

The corrosive electrochemistry of jamesonite was studied by cyclic voltammetry. Every peak in voltammograms was identified through thermodynamic calculation. The results show an irreversible electrode process by the strong adsorption of oxidation elemental sulfur on jamesonite. A deficient-metal and sulfur-rich compound is formed under the potential of 80 mV at pH 6.86. The passive action by elemental sulfur occurs from 80 to 470 mV and S₂O₃²⁻, SO₄²⁻ are produced at potential over 470 mV. The anodic peak producing SO₄²⁻ is inhibited due to the deposition of PbSO₄ at higher potential in Na₂SO₄ solution. The corrosive action of jamesonite becomes strong and the redox characterization similar to PbS, FeS and Sb₂S₃ appears at pH 9.18.

Keywords

jamesonite / corrosive electrochemistry / voltammetry

References

[1] HamiltonI C, WoodRForssberyK S E. A voltammetric study of the surface oxidation of sulfide minerals. Developments in mineral processing[A]. Flotation of Sulfide Minerals[C], 1985, Netherland, Elsevier: 259-285

[2] GuGuo-huaRedox Reaction and Original Potential Flotation in the System of Ground-Flotation of Sulfide Mineral[D], 1998, Changsha, Central South University of Technology

[3] GuyP J, TratharW JForsbergK S E. The effects of oxidation and mineral interaction on sulfide flotation[A]. Flotation of Sulfide Minerals[C], 1985, Netherlands, Elsevier: 61-79

[4] RichardsonP E, HuQ, FinkelsteinN P, et al.. An electrochemical method for the study of the flotation chemistry of sphalerite[J]. Int J Miner Process, 1994, 41(1): 71-76

[5] BuckleyA N, WoodsR. Relaxation of the lead-deficient sulfide surface layer on oxidized ganena[J]. J Appl Electrochem, 1996, 26: 899-907

[6] BuckleyA N, KaravetsI M, ShchukarevA V. Interaction of galena with hydrosulfide ions under controlled potential[J]. J Appl Electrochem, 1994, 24: 513-520

[7] WoodsRBockrisJ O M, ConwayB E, WhiteR E. Chemisorption of thios on metal and metal sulfides[A]. Modern Aspects of Electrochemistry [C], 1997, New York, Plenum Press: 401-453

[8] VaughanD J, BeckerU, WrightK. Sulfide mineral surfaces: theory and experiment [J]. Int J Miner Process, 1997, 51(1): 1-14

[9] NagarajD R, BrinenJ S. SIMS study of adsorption of collector on pyrite[J]. Int J Miner Process, 2002, 63(1): 45-57

[10] O’DeaA R, PrinceK E, SmartR S C, et al.. Secondary ion mass spectrometry investigation of the interaction of xanthate with galena[J]. Int J Miner Process, 2001, 61(2): 121-143

[11] CostaM C, Botelho do RegoA M, AbrantesL M. Characterization of a natural and an electro-oxidized arsenopyrite: a study on electrochemical and X-ray photoelectron spectroscopy[J]. Int J Miner Process, 2002, 65(2): 83-108

[12] ElsheriefA E. The influence of cathodic reduction, Fe²⁺ and Cu²⁺ ions on the electrochemical dissolution of chalcopyrite in acidic solution[J]. Minerals Engineering, 2002, 15(4): 215-223

[13] WangDiang-zuo, HuYue-huaSolution Chemistry of Flotation [M], 1989, Changsha, Hunan Science and Technology Press: 307-307

[14] GuGuo-hua, HuYue-hua, QiuGuan-zhou, et al.. Electrochemistry of galena in high alkaline flotation [J]. Mining and Metallurgical Engineering, 2002, 22(1): 52-55

[15] ZhouZhong-bei, ChenYong-yanBasic Theory and Principle of Electrode Process Kinetics[M], 1989, Wuhan, Wuhan University Press: 252-280