Spectroscopic, thermodynamic and ultrasonic properties of pseudo‐binary mixtures of organic extractants and vegetable oil at 25–60°C under atmospheric pressure

Abstract

This work is intended to investigate the molecular interactions and transport properties of five pseudo‐binary mixtures of various combinations of vegetable oils (sesame oil and sunflower oil) and organic extractants (Aliquat 336, TBP, D2EHPA and TOA) by determining their surface tension, density and viscosity over a temperature range of 25–60°C at atmospheric pressure. The experimental data are fitted into various literature models. Information on excess molar volume and viscosity deviation leads to an understanding of solute–solvent interactions. Further, the ultrasonic velocity, isentropic compressibility, intermolecular free length, specific impedance, apparent molar volume, volumetric thermal expansion coefficient, excess Gibbs' free energy, change in enthalpy of mixing and entropy of activation of the liquids have been calculated. A model relating the surface tension, density and viscosity of the pseudo‐binary mixtures has been proposed in this paper. Analysis of Fourier transform infrared (FTIR) studies has further illustrated the intermolecular interactions in the pseudo‐binary mixtures.

Hybrid Technique for Removal of Arsenic from Drinking Water

“…The organic phase consists of a mixture of sesame oil and Aliquat 336. This mixture has been selected based on the previous research work that indicated a strong intermolecular interaction between sesame oil and Aliquat 336 due to which Aliquat 336 is immobilized within the organic phase without being adversely affected to perform its function as an extractant [36].…”