Hexavalent Chromium Removal and Reduction to Cr (III) by Polystyrene Tris(2-aminoethyl)amine
Date
2015-01-03
Authors
Odeh, Lina
Odeh, Imad
Khamis, Mustafa
Khatib, Mahmoud
Qurie, Mohannad
Shakhsher, Ziad
Journal Title
Journal ISSN
Volume Title
Publisher
Scientific Research Publishing
Abstract
A commercially available chelating polymer, polystyrene tris(2-aminoethyl)amine, was used for
the removal of chromium from aqueous solution. The influence of pH, contact time, adsorbent dosage
and initial Cr (VI) concentration on adsorption was studied. The optimum pH for the removal
of Cr (VI) was at pH 5, while optimum contact time and adsorbent dosage were 120 minutes and
10 g/L, respectively. Total chromium and Cr (VI) concentrations were analyzed by ICP-MS and UVVisible.
Adsorption isotherms using Langmuir and Freundlich isotherm models revealed that the
data fitted Langmuir isotherm model better than Freundlich with a maximum adsorption capacity
of 312.27 mg/g. FTIR spectroscopy, Scanning electron microscopy (SEM) and Energy Dispersive
Spectrometry (EDS) analyses were performed on the adsorbent before and after binding Cr (VI).
All analyses confirmed the complexation of Cr (VI) to the adsorbent. Desorption experiments using
KCl solution indicated 89.3% release of chromium, rendering this method of high potential for
adsorbent regeneration.
Description
Keywords
Adsorption of Cr (VI) , Polystyrene Tris(2-aminoethyl)amine , ICP-MS , SEM , EDS