Retention Profile and Selective Separation of Trace Concentrations of Phenols from Water onto Iron(III) Physically Loaded Polyurethane Foam Solid Sorbent: Kinetics and Thermodynamic StudyEl-Shahawi MS*, Hamza A, Alwael H, Bashammakh AS, Al-Sibaai AA and Saigl ZM
Department of Chemistry, Faculty of Science, Damietta University, Damietta, Egypt
- *Corresponding Author:
- El-Shahawi MS
Department of Chemistry, Faculty of Science
King Abdulaziz University, Jeddah, Saudi Arabia
E-mail: [email protected],[email protected]
Received date: September 16, 2014; Accepted date: October 21, 2014; Published date: October 31, 2014
Citation: El-Shahawi MS, Hamza A, Alwael H, Bashammakh AS, Al-Sibaai AA,et al. (2014) Retention Profile and Selective Separation of Trace Concentrations of Phenols from Water onto Iron(III) Physically Loaded Polyurethane Foam Solid Sorbent: Kinetics and Thermodynamic Study. J Chromatogr Sep Tech 5:241. doi:10.4172/2157-7064.1000241
Copyright: © 2014 El-Shahawi MS, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Phenols are included in the list of potential toxins for motor neurons. Thus, fast and selective method for removal of phenols has been developed. The method was based upon the extraction of iron (III) phenolate complex anions [Fe(phenolate)6]3- by tri-n-butylphosphine (TBP)-plasticized iron(III) immobilized polyurethane foam (PUF) from the test aqueous solution adjusted to pH≈1 followed by subsequent formation of ternary ion association complex of these species with the protonated urethane and/or ether linkages on the PUF solid phase extractor (SPE). The rate of removal of phenols from the aqueous solution by TBP plasticized iron (III) immobilized PUF were studied in batch conditions employing a series of kinetic models. Initially, phenols uptake onto plasticized iron (III) treated PUF was fast followed by kinetically pseudo-second order rate equation with an overall rate constant (k) of 0.014 and 0.018 g (mg min)-1 for phenol and 2-chlorophenol (2-CP), respectively. Endothermic nature of phenols sorption is governed by the positive value of ΔH where as the negative values of ΔG dictate that the uptake of the analyte onto the sorbent is spontaneous phenomena. The positive values of ΔS for both phenols may be indicative of moderate sorption step of the complex anion [Fe(C6H5O)6]3- and ordering of ionic charges with a compensatory disordering of the sorbed species onto the sorbents. PUF sorbent provides efficient removal of phenols traces from various water samples.