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In situ total internal reflection Raman spectroscopy of surfactant adsorption at a mineral surface
Ian Wark Research Institute, University of South Australia.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0001-9794-8305
2006 (English)In: Vibrational Spectroscopy, ISSN 0924-2031, E-ISSN 1873-3697, Vol. 41, no 2, p. 198-204Article in journal (Refereed) Published
Abstract [en]

We present the first attempt to characterise surfactant adsorption from solution onto a particle film using total internal reflection Raman spectroscopy. Three surfactant collectors of interest to the mineral processing industry were studied in their adsorption onto sphalerite: heptyl xanthate, 2-mercaptobenzothiazole (MBT), and O,O-dibutyldithiophosphate (DTP). All three surfactants adsorbed to the surface of the sphalerite. Adsorption of heptyl xanthate was monitored as a function of time and increasing concentration. The spectrum of heptyl xanthate indicated the presence of a small amount of dixanthogen on the surface of the sphalerite. MBT adsorption studies were complicated due to the fluorescence of the adsorbed layer. However, peaks due to the adsorbed MBT were observed on top of the fluorescent background, allowing the identification of the adsorbed species to be confirmed as the oxidised dimer species. Spectra obtained from MBT and DTP co-adsorption studies did not display the strong adsorbate layer fluorescence, indicating that the fluorescence spectrum of the adsorbed MBT is most likely affected by ring-ring interactions.

Place, publisher, year, edition, pages
2006. Vol. 41, no 2, p. 198-204
National Category
Metallurgy and Metallic Materials Physical Chemistry
Research subject
Process Metallurgy; Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-6042DOI: 10.1016/j.vibspec.2006.02.003ISI: 000240358900009Scopus ID: 2-s2.0-33746882147Local ID: 43c723d0-b078-11db-840a-000ea68e967bOAI: oai:DiVA.org:ltu-6042DiVA, id: diva2:978918
Note
Validerad; 2006; Bibliografisk uppgift: 6th Australian Conference on Vibrational Spectroscopy; 20070130 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Lidström-Larsson, MargaretaHolmgren, Allan

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