Cloud point extraction of 2,4−dichlorophenol from aqueous samples employing β−cyclodextrin

Zain, N.N.M. and Abu Bakar, N.K. and Mohamad, Sharifah (2016) Cloud point extraction of 2,4−dichlorophenol from aqueous samples employing β−cyclodextrin. Separation Science and Technology, 51 (4). pp. 653-663. ISSN 0149-6395

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Official URL: http://dx.doi.org/10.1080/01496395.2015.1119852

Abstract

In this study, β−cyclodextrin (β−CD) was used to enhance the extraction of 2,4−dichlorophenol (2,4−DCP) from the aqueous sample in cloud point extraction (CPE) using spectrophotometric method. Several parameters have been investigated with and without the presence of β−CD modifier, such as pH, equilibration temperature, analyte concentration, and water content in the CPE and CPE−βCD systems, respectively. Equilibrium data are described by the Langmuir isotherm in both CPE systems with and without β−CD modifier. The thermodynamic parameters (positive values of ΔH° and ΔS°, negative values of ΔG°) indicate that the solubilization of 2,4−DCP in a polyethylene glycol silicone surfactant (DC193C) is endothermic, entropy gained, and spontaneous in both systems. In the CPE−βCD system, the results show that the β−CD modifier is capable of enhancing the extraction of 2,4−DCP pollutant from aqueous samples.

Item Type: Article
Uncontrolled Keywords: Cloud point extraction; β−cyclodextrin; 2; 4; −Dichlorophenol; Non-ionic surfactant; Spectrophotometric
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 16 May 2018 08:11
Last Modified: 22 Feb 2019 08:19
URI: http://eprints.um.edu.my/id/eprint/18707

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