The poisoning of pyrite surface upon xanthate adsorption by cyanide in mildly acidic media

Guo, Bao (2016) The poisoning of pyrite surface upon xanthate adsorption by cyanide in mildly acidic media. Electroanalysis, 28 4: 724-732. doi:10.1002/elan.201500355


Author Guo, Bao
Title The poisoning of pyrite surface upon xanthate adsorption by cyanide in mildly acidic media
Journal name Electroanalysis   Check publisher's open access policy
ISSN 1521-4109
Publication date 2016-04-01
Year available 2016
Sub-type Article (original research)
DOI 10.1002/elan.201500355
Open Access Status Not Open Access
Volume 28
Issue 4
Start page 724
End page 732
Total pages 9
Place of publication Weinheim, Germany
Publisher Wiley - VCH Verlag
Collection year 2017
Language eng
Abstract Xanthate adsorbs on pyrite surface at mildly acidic pH, rendering mineral surface hydrophobic. By far, the electrochemical behavior of pyrite exposed to cyanide-bearing solution has been reported in alkaline media. The impact of cyanide on the chemisorption of xanthate on pyrite in mildly acidic media is unclear. The present study clearly pictured the interfacial processes in pyrite-xanthate-cyanide system at pH 5 via methods of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It is determined that cyanide blocks the formation of xanthate layer on pyrite surface over a broad range of potential, although the oxidation of xanthate in solution almost remains unaffected. The pyrite surface upon xanthate adsorption is poisoned by cyanide with the formation of iron cyanide complex.
Keyword Cyanide
Pyrite
Xanthate
Adsorption
Mildly acidic media
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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