Investigation of salts behavior at liquid–liquid interfaces

N. P. Khiabani*, A. Bahramian, M. Soltani, P. Pourafshary, K. Sarikhani, P. Chen, M. R. Ejtehadi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We have used molecular dynamics simulation to investigate hydrophilic– hydrophobic interfaces between calcium chloride (CaCl2) aqueous solutions and normal hexane. The results demonstrate the increasing impact of salt concentration on the liquid–liquid interfacial tension, hence, negative adsorption of CaCl2 according to Gibbs adsorption isotherm. Moreover, we calculated the density profiles of hexane, water, and the counter ions. The results reveal an electrical double layer near the interface and the less affinity of calcium cations toward the interface than that of chloride anions. Orientation of water molecules at the studied concentrations may result in developing a positively charged interface and, consequently, accumulation of anions close to the charged interface. Our calculations show that the interfacial width decreases by increasing salt concentration. Therefore, consistent with the calculated interfacial tension (IFT) data, aqueous salt solutions are less miscible in normal hexane at higher salt concentrations.

Original languageEnglish
Title of host publicationSpringer Proceedings in Mathematics and Statistics
PublisherSpringer New York LLC
Number of pages6
ISBN (Print)9783319123066, 9783319123066
Publication statusPublished - 2015
EventInternational Conference on Applied Mathematics, Modelling and Computational Science, AMMCS 2013 - Waterloo, Canada
Duration: Aug 26 2013Aug 30 2013


OtherInternational Conference on Applied Mathematics, Modelling and Computational Science, AMMCS 2013

ASJC Scopus subject areas

  • Mathematics(all)


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