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Adsorption mechanism of diethyldithiocarbamate on covellite, cuprite and tenorite
Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
1991 (English)In: Colloids and Surfaces, ISSN 0166-6622, E-ISSN 1873-4340, Vol. 60, p. 53-69Article in journal (Refereed) Published
Abstract [en]

Adsorption of diethyldithiocarbamate (DTC) on covellite, cuprite and tenorite was investigated under different experimental conditions. The qualitative nature of surface species formed at the interface was examined by selective solvent extraction and UV-visible spectrophotometric techniques. The presence of surface species such as [Cu(DTC)]+, Cu(DTC)2 and Cu(I) DTC at different concentrations of the reagent and pH of the suspension was investigated. The results of this study indicate a surface reaction between DTC ligand molecules and surface copper sites. As a result of interaction with DTC, cations on the mineral surface are dislodged from the lattice and precipitated on the surface as copper dithiocarbamate complexes. Depending on the concentration of DTC, two types of copper complexes, i.e. [Cu(DTC)]+ at low concentration and Cu(DTC)2 at higher concentration, are noted on copper(II) substrates, whereas on cuprite Cu(I) DTC was formed along with [Cu(DTC)]+ and Cu(DTC)2. From the kinetic study, the overall adsorption was found to be mainly controlled by diffusion processes.

Place, publisher, year, edition, pages
1991. Vol. 60, p. 53-69
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-2668DOI: 10.1016/0166-6622(91)80268-SISI: A1991GU22300004Scopus ID: 2-s2.0-0026259184Local ID: 052525d0-f1ca-11db-bb1b-000ea68e967bOAI: oai:DiVA.org:ltu-2668DiVA, id: diva2:975521
Note
Godkänd; 1991; 20070423 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Forsling, Willis

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