Removal of heavy metal Ions from mixed solutions via polymer-enhanced ultrafiltration using starch as a water-soluble biopolymer

Baharuddin, N.H. and Sulaiman, N.M.N. and Aroua, M.K. (2015) Removal of heavy metal Ions from mixed solutions via polymer-enhanced ultrafiltration using starch as a water-soluble biopolymer. Environmental Progress & Sustainable Energy, 34 (2). pp. 359-367. ISSN 1944-7442, DOI https://doi.org/10.1002/Ep.11995.

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Abstract

In this study, aqueous solutions containing mixtures of heavy metals namely Zn (II), Pb (II), Cr (III), and Cr (VI) were treated by polymer-enhanced ultrafiltration (PEUF) using unmodified starch as binding biopolymer. The performance of starch in removing these heavy metals was compared with that of polyethylene glycol (PEG) a commonly used polymer in PEUF processes. Rejection coefficients and flux were studied under different values of pH solution and metal ion concentrations maintaining the transmembrane pressure constant at 1.5 bar. At pH 7, and starch concentration of 0.05, the rejection was the highest at around 90. As metal ion concentration increased from 10 to 50 mg/L, the rejection of metal ions decreased. It was found that starch gave higher rejection for Zn (II) and Cr (III) at 0.05 g/L of polymer concentration, whereas 1 g/L of PEG concentration gave higher rejection for Cr (VI) at 10 mg/L. The influence of metal ion concentration on Pb (II) rejection is not significant for the two selected polymers. The rejection of these metal ions by starch in this study is found to be influenced by granule structure that generally behaved in a non-ionic manner. (c) 2014 American Institute of Chemical Engineers Environ Prog, 34: 359-367, 2015

Item Type:	Article
Funders:	The authors acknowledge the financial support from University of Malaya, Malaysia through the Postgraduate Research Fund (PPP Grant) with grant PS 104-2010B and PV 092-2011B.
Additional Information:	Ce2fw Times Cited:0 Cited References Count:29
Uncontrolled Keywords:	Polymer-enhanced ultrafiltration, multivalent metal ions removal, complexing agents, unmodified starch, polyethylene glycol, aqueous effluents, polyacrylic-acid, separation, membrane, recovery, cadmium, lead,
Subjects:	T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TP Chemical technology
Divisions:	Faculty of Engineering
Depositing User:	Mr Jenal S
Date Deposited:	23 Jul 2015 00:30
Last Modified:	23 Jul 2015 00:30
URI:	http://eprints.um.edu.my/id/eprint/13753

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