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Interactions between Sulfide Minerals and Alkylxanthate Ions .2. A Vibration Spectroscopic and Atomic-Absorption Spectrophotometric Study of the Interactions between Sphalerite and Copper-Activated Sphalerite, and Ethyl-Decylxanthate and N-Decylxanthate Ions in Aqueous and Acetone Solutions

Persson, Per LU and Persson, I. (1991) In Colloids and Surfaces 58. p.149-160
Abstract
The reactions between three sphalerite samples and ethyl- and n-decylxanthate ions have been studied in aqueous and acetone solutions. Qualitative analysis of the species present on the sphalerite surfaces before and after treatment with these ions have been performed by means of diffuse reflectance infrared Fourier transform spectroscopy. Atomic absorption spectrophotometry has been used to determine the total zinc, iron and lead concentrations in the aqueous phase of sphalerite slurries before and after treatment with alkylxanthate ions. Sphalerite surfaces are hardly oxidized in air, and only small amounts of zinc are dissolved. No iron is dissolved from sphalerite with a low iron content, 0.5-1.0%, while both iron and lead are... (More)
The reactions between three sphalerite samples and ethyl- and n-decylxanthate ions have been studied in aqueous and acetone solutions. Qualitative analysis of the species present on the sphalerite surfaces before and after treatment with these ions have been performed by means of diffuse reflectance infrared Fourier transform spectroscopy. Atomic absorption spectrophotometry has been used to determine the total zinc, iron and lead concentrations in the aqueous phase of sphalerite slurries before and after treatment with alkylxanthate ions. Sphalerite surfaces are hardly oxidized in air, and only small amounts of zinc are dissolved. No iron is dissolved from sphalerite with a low iron content, 0.5-1.0%, while both iron and lead are dissolved from a sphalerite sample containing 7% iron and 1% lead during the preparation of aqueous sphalerite slurries. Alkylxanthate ions are coordinated to sphalerite as surface complexes where the xanthate group is coordinated to the zinc sites in covalent interactions if no solid ethylxanthate species is formed on the surface. Lead-containing sphalerite acts like galena, and lead (II) alkylaxanthate precipitates on the surface. Zinc (II) ions in the sphalerite surface are exchanged for copper(II) ions during activation of sphalerite with copper(II) ions. In the reaction between copper(II)-activated sphalerite and alkylxanthate ions, copper(I) alkylxanthate and dialkyl dixanthogen are formed on the sphalerite surface. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Colloids and Surfaces
volume
58
pages
149 - 160
publisher
Elsevier
external identifiers
  • scopus:0041539824
ISSN
0166-6622
DOI
10.1016/0166-6622(91)80204-2
language
English
LU publication?
no
id
a95e3800-1a69-40cb-b635-093464ccfafd (old id 4332731)
date added to LUP
2014-03-04 09:48:16
date last changed
2017-01-01 07:12:53
@article{a95e3800-1a69-40cb-b635-093464ccfafd,
  abstract     = {The reactions between three sphalerite samples and ethyl- and n-decylxanthate ions have been studied in aqueous and acetone solutions. Qualitative analysis of the species present on the sphalerite surfaces before and after treatment with these ions have been performed by means of diffuse reflectance infrared Fourier transform spectroscopy. Atomic absorption spectrophotometry has been used to determine the total zinc, iron and lead concentrations in the aqueous phase of sphalerite slurries before and after treatment with alkylxanthate ions. Sphalerite surfaces are hardly oxidized in air, and only small amounts of zinc are dissolved. No iron is dissolved from sphalerite with a low iron content, 0.5-1.0%, while both iron and lead are dissolved from a sphalerite sample containing 7% iron and 1% lead during the preparation of aqueous sphalerite slurries. Alkylxanthate ions are coordinated to sphalerite as surface complexes where the xanthate group is coordinated to the zinc sites in covalent interactions if no solid ethylxanthate species is formed on the surface. Lead-containing sphalerite acts like galena, and lead (II) alkylaxanthate precipitates on the surface. Zinc (II) ions in the sphalerite surface are exchanged for copper(II) ions during activation of sphalerite with copper(II) ions. In the reaction between copper(II)-activated sphalerite and alkylxanthate ions, copper(I) alkylxanthate and dialkyl dixanthogen are formed on the sphalerite surface.},
  author       = {Persson, Per and Persson, I.},
  issn         = {0166-6622},
  language     = {eng},
  pages        = {149--160},
  publisher    = {Elsevier},
  series       = {Colloids and Surfaces},
  title        = {Interactions between Sulfide Minerals and Alkylxanthate Ions .2. A Vibration Spectroscopic and Atomic-Absorption Spectrophotometric Study of the Interactions between Sphalerite and Copper-Activated Sphalerite, and Ethyl-Decylxanthate and N-Decylxanthate Ions in Aqueous and Acetone Solutions},
  url          = {http://dx.doi.org/10.1016/0166-6622(91)80204-2},
  volume       = {58},
  year         = {1991},
}