Effect of pH on adsorption of anionic surfactants on limestone: Experimental study and surface complexation modeling

Effect of pH on adsorption of anionic surfactants on limestone: Experimental study and surface... Colloids and Surfaces A 538 (2018) 549–558 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Effect of pH on adsorption of anionic surfactants on limestone: Experimental study and surface complexation modeling M. Tagavifar , S.H. Jang, H. Sharma, D. Wang, L.Y. Chang, K. Mohanty, G.A. Pope Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, 200 E. Dean Keeton St., Stop C0300, Austin, TX 78712-1585, USA GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: We investigate surfactant adsorption on a model carbonate rock over a wide range of pH and surfactant-to-solid Surfactant adsorption ratios, by both an experimental and a theoretical approach, to obtain a quantitative understanding of how Carbonates mineral constituents affect the adsorption equilibrium and dynamics. A combination of bulk mineralogy, ele- Surface complexation mental composition analysis, dissolution behavior, and water ionic composition data were used to characterize Geochemistry the samples’ surface heterogeneity. The adsorption of anionic surfactants is 2.4 mg/m at pH of ∼8 and de- creases approximately linearly with pH values above 9. To constrain and compare the relative adsorption affinity and the likely modes of attachment on mineral constituents as pH changes, we performed surface complexation http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Colloids and Surfaces A: Physicochemical and Engineering Aspects Elsevier

Effect of pH on adsorption of anionic surfactants on limestone: Experimental study and surface complexation modeling

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0927-7757
eISSN
1873-4359
D.O.I.
10.1016/j.colsurfa.2017.11.050
Publisher site
See Article on Publisher Site

Abstract

Colloids and Surfaces A 538 (2018) 549–558 Contents lists available at ScienceDirect Colloids and Surfaces A journal homepage: www.elsevier.com/locate/colsurfa Effect of pH on adsorption of anionic surfactants on limestone: Experimental study and surface complexation modeling M. Tagavifar , S.H. Jang, H. Sharma, D. Wang, L.Y. Chang, K. Mohanty, G.A. Pope Department of Petroleum and Geosystems Engineering, The University of Texas at Austin, 200 E. Dean Keeton St., Stop C0300, Austin, TX 78712-1585, USA GR APHICAL A BSTRACT ARTICLE I NFO ABSTRACT Keywords: We investigate surfactant adsorption on a model carbonate rock over a wide range of pH and surfactant-to-solid Surfactant adsorption ratios, by both an experimental and a theoretical approach, to obtain a quantitative understanding of how Carbonates mineral constituents affect the adsorption equilibrium and dynamics. A combination of bulk mineralogy, ele- Surface complexation mental composition analysis, dissolution behavior, and water ionic composition data were used to characterize Geochemistry the samples’ surface heterogeneity. The adsorption of anionic surfactants is 2.4 mg/m at pH of ∼8 and de- creases approximately linearly with pH values above 9. To constrain and compare the relative adsorption affinity and the likely modes of attachment on mineral constituents as pH changes, we performed surface complexation

Journal

Colloids and Surfaces A: Physicochemical and Engineering AspectsElsevier

Published: Feb 5, 2018

References

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