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The effect of inorganic ions on dodecylbenzenesulfonate adsorption onto hematite: an ATR-FTIR study
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.ORCID iD: 0000-0001-9794-8305
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.ORCID iD: 0000-0002-4755-5754
2014 (English)In: Journal of Surfactants and Detergents (JSD), ISSN 1097-3958, E-ISSN 1558-9293, Vol. 17, no 5, p. 1027-1034Article in journal (Refereed) Published
Abstract [en]

Linear alkylbenzenesulfonates (LAS) are an important group of anionic surfactants within the detergent industry and have also been suggested for use in mineral flotation and enhanced oil recovery. Because of its great industrial importance, there are a number of publications on the adsorption of LAS on metal oxides; however, the effect of co-adsorbing inorganic species on LAS adsorption has rarely been addressed. In this study we investigated the effect of calcium and carbonate ions on the adsorption of sodium dodecylbenzenesulfonate (DBS) onto hematite at pH 8 and 10.5 using in-situ ATR-FTIR spectroscopy. DBS adsorption on hematite was found to increase as pH was decreased from 10.5 to 8. Calcium ions promoted accumulation of DBS on hematite, with a larger amount of DBS on the surface at pH 10.5. Carbonate ions did not have any major effect on DBS adsorption on hematite. In the presence of both calcium and carbonate, the amount of DBS on the hematite surface was higher than without the two co-adsorbing ions but lower than with calcium ions alone. Likely, precipitation of calcite reduced the total concentration of calcium ions available for the interaction with DBS on the hematite surface. The results presented in this work clearly indicate the importance of water chemistry for DBS adsorption and allow predicting adsorption behavior of DBS on iron oxides from natural and process waters of different chemistry, which is important for the industrial applications of DBS and the fate of DBS in the environment.

Place, publisher, year, edition, pages
2014. Vol. 17, no 5, p. 1027-1034
National Category
Chemical Process Engineering
Research subject
Chemical Technology
Identifiers
URN: urn:nbn:se:ltu:diva-8670DOI: 10.1007/s11743-014-1576-3ISI: 000340668500024Scopus ID: 2-s2.0-84906322862Local ID: 7358e5c0-3e4f-44f1-9157-c54d4aeb5365OAI: oai:DiVA.org:ltu-8670DiVA, id: diva2:981608
Note
Validerad; 2014; 20131216 (elipot)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Potapova, ElisavetaJolsterå, RickardHolmgren, AllanGrahn, Mattias

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