Radiation synthesis and characterization of 2-hydroxyethyl-methacrylate-based hydrogels containing di- and tri-protic acid and its application on wastewater treatment

Radiation-crosslinked 2-hydroxyethylmethacrylate/citric acid (HEMA/CAc), 2-hydroxyethylmethacrylate/tartaric acid (HEMA/TA), and 2-hydroxyethylmethacrylate/succinic acid (HEMA/Sc) copolymers were prepared by using ⁶⁰Co γ-rays. The gel fraction yield and the swelling behavior of the prepared hydrogel...

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Bibliographic Details
Published in:Journal of applied polymer science 2008-02, Vol.107 (3), p.1759-1776
Main Authors: Abdel-Aal, Samia E, Hegazy, El-Sayed A, Abou Taleb, M.F, Dessouki, Ahmed M
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
hydrogel
Organic polymers
Other wastewaters
Physicochemistry of polymers
Pollution
Properties and characterization
protic acid
radiation copolymerization
Solution and gel properties
wastewater
Wastewaters
Water treatment and pollution
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Summary:Radiation-crosslinked 2-hydroxyethylmethacrylate/citric acid (HEMA/CAc), 2-hydroxyethylmethacrylate/tartaric acid (HEMA/TA), and 2-hydroxyethylmethacrylate/succinic acid (HEMA/Sc) copolymers were prepared by using ⁶⁰Co γ-rays. The gel fraction yield and the swelling behavior of the prepared hydrogels were studied. It was shown that increasing irradiation doses was accompanied by an increase in yield of gel fraction and a decrease in swelling degree. The parameters of equilibrium swelling, maximum swelling, initial swelling rate, swelling exponent, and diffusion coefficient of the hydrogels were determined by studying the swelling behavior of the hydrogels prepared. It was seen that the equilibrium swelling degree increases as the content of acid increases, as a result of introducing more hydrophilic groups. When the hydrophilic polymer (acids) varies in the content range of 40-80 mg, swelling exponents (n) decreases, thereby indicating a shift in the water-transport mechanism from the anomalous (non-Fickian)-type to the Fickian-type. Characterization and some selected properties of the prepared hydrogels were studied, and accordingly the possibility of its practical use in the treatment of industrial wastes such as dyes and heavy metals (Fe, Ni, Co, and Cu) were also studied. The effect of treatment time, pH of feed solution, initial feed concentration, and temperature on the dye and heavy metals uptake was determined. The uptake order for a given metal was HEMA/TA hydrogel > HEMA/CAc > HEMA/Sc hydrogel. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
ISSN:0021-8995
1097-4628
DOI:10.1002/app.24541