Adsorption of aluminum ion from water on alginate-modified polyurethane

Title
Adsorption of aluminum ion from water on alginate-modified polyurethane
Authors
김기팔Zubair Ahmed송경근Saleh F. MagramMaged H. H. Daoud안규홍팽기정
Keywords
alginate-modified polyurethane; Aluminum ion; Adsorption; Wastewater reuse
Issue Date
2011-05
Publisher
Journal of chemical engineering of Japan
Citation
VOL 44, NO 4, 247-255
Abstract
A dual purpose absorbent Alginate-modified polyurethane (APU) has been prepared for the removal of residual aluminum ions by adsorption from treated wastewater. The structure of APU was confirmed by Fourier transform infrared (FT-IR) spectroscopy and proton nuclear magnetic resonance (1H-NMR) spectroscopy. Physical characterization was preformed according to the BET method. Surface analysis using SEM/EDS revealed that an average of 0.57% aluminum by weight was adsorbed on APU. The adsorption isotherm of aluminum for APU fitted well to the Freundlich model. The analysis kinetic data suggests that adsorption of aluminum follows pseudo-first-order kinetics. The adsorption of aluminum on APU increased slightly from 25 to 35°C, indicating endothermic adsorption. The activation energy of adsorption, 8.16 kJ/mol, characterizes the dominant chemiosorption nature of this adsorption. The optimum pH for aluminum adsorption on APU (applied pH: 3–8) was found to be within the pH range of wastewater effluent. The adsorption capacity of APU for aluminum using real wastewater effluent was 3.8 mg Al/g, which demonstrates the feasibility of applying APU to the treatment of water of complex compositions.
URI
http://pubs.kist.re.kr/handle/201004/39798
ISSN
0021-9592
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KIST Publication > Article
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