Concentration effects of hydrochloric acid on the anodic behaviour of lead sulphide

Dandapani, B.; Ghali, Edward

doi:10.1007/bf00610479

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S -5 4h20 ~E So4~-+ 8h + + 6e [4]1

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1982

1994

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Cited by 4 publications

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“…If reaction [5] could contribute to the formation of PbSO4 at peak C then the dissolution process will be highly pH dependent. In a separate study on the dissolution behavior in hydrochloric acid the dissolution of PbS has been found to be very much dependent on pH (24). This indicates that reaction [5] could be responsible for the observed behavior.…”

Section: S -5 4h20 ~E So4~-+ 8h + + 6e [4]mentioning

confidence: 98%

The Nature of Passivation of Lead Sulfide during Anodic Dissolution in Hydrochloric Acid

Dandapani

Ghali

1982

J. Electrochem. Soc.

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Effective electrowinning of lead directly from its sulfide ore requires a fundamental understanding of its electrodissolution process. Studies made on the anodic dissolution of normalPbS in hydrochloric acid have shown that there are obstructions to the electrodissolution due to some passivation. Detailed surface examination (SEM‐EDAX and x‐ray diffraction studies) is conducted to determine the nature of the passivation products at various potential regions. It has been shown that crystalline sulfur, lead chloride, and lead sulfate are responsible for the observed phenomena.

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Section: S -5 4h20 ~E So4~-+ 8h + + 6e [4]mentioning

confidence: 98%