Cloud point extraction of 2,4−dichlorophenol from aqueous samples employing β−cyclodextrin
Document Type
Article
Publication Date
1-1-2016
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.
Keywords
Cloud point extraction, β−cyclodextrin, 2, 4, −Dichlorophenol, Non-ionic surfactant, Spectrophotometric
Divisions
CHEMISTRY
Funders
Universiti Malaya (IPPP grant: PV040/2012A),Universiti Sains Malaysia (304/CIPPT/6313231)
Publication Title
Separation Science and Technology
Volume
51
Issue
4
Publisher
Taylor & Francis