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Published in: Polymer Bulletin 11/2016

23-03-2016 | Original Paper

Synthesis and characterization of pH-sensitive superabsorbent hydrogels based on sodium alginate-g-poly(acrylic acid-co-acrylamide) obtained via an anionic surfactant micelle templating under microwave irradiation

Authors: Mohammad Tally, Yomen Atassi

Published in: Polymer Bulletin | Issue 11/2016

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Abstract

A novel porous superabsorbent polymer based on poly(acrylic acid-co-acrylamide) grafted onto sodium alginate backbone was prepared under microwave irradiation. Anionic surfactant sodium n-dodecyl benzenesulfonate (SDBS) is used as a pore-forming micelle templating. FTIR spectroscopy confirmed the formation of the gel and removal of SDBS by washing. The swelling behaviors in distilled water and in solutions with different pH values are investigated. The results indicate that there is an optimized concentration of SDBS (1.92 mM) where the swelling rate (63.84 g g−1 min−1) and the swelling capacity (1078 g/g) are maximal. These results are also supported by scanning electron microscopy where the optimized hydrogel exhibits higher pore sizes and interconnected open cellular structure. The optimized hydrogel is used as adsorbent for metal ion Pb(II). Isotherm of adsorption and effect of pH, adsorption dosage and recyclability are discussed. The results show that maximum adsorption capacity of Pb(II) on the hydrogel is 480.77 mg.g−1 and adsorption is well described by Langmuir isotherm model. Adsorption capacity of the optimized hydrogel for other hazardous heavy metal ions Cd(II), Ni(II) and Cu(II) and their competitive adsorption are also investigated.

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Metadata
Title
Synthesis and characterization of pH-sensitive superabsorbent hydrogels based on sodium alginate-g-poly(acrylic acid-co-acrylamide) obtained via an anionic surfactant micelle templating under microwave irradiation
Authors
Mohammad Tally
Yomen Atassi
Publication date
23-03-2016
Publisher
Springer Berlin Heidelberg
Published in
Polymer Bulletin / Issue 11/2016
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-016-1649-8

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