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Radiation synthesis and characterization of poly( N ‐vinyl‐2‐pyrrolidone/acrylic acid) and poly( N ‐vinyl‐2‐pyrrolidone/acrylamide) hydrogels for some metal‐ion separation
Author(s) -
Hegazy ElSayed A.,
Abd ElAal S. E.,
Abou Taleb M. F.,
Dessouki A. M.
Publication year - 2004
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.20208
Subject(s) - self healing hydrogels , 2 pyrrolidone , copolymer , acrylic acid , acrylamide , polymer chemistry , monomer , swelling , metal ions in aqueous solution , nuclear chemistry , thermal stability , chemistry , materials science , metal , polymer , organic chemistry , composite material
Two different hydrogels, prepared from N ‐vinyl‐2‐pyrrolidone/acrylic acid (NVP/AAc) and N ‐vinyl‐2‐pyrrolidone/acrylamide (NVP/AAm), were studied for the separation and extraction of some heavy‐metal ions from wastewater. The hydrogels were prepared by the γ‐radiation‐induced copolymerization of the aforementioned binary monomer mixtures. Further modification was carried out for the NVP/AAc copolymer through an alkaline treatment to improve the swelling behavior by the conversion of the carboxylic acid groups into its sodium salts. The thermal stability and swelling properties were also investigated as functions of the N ‐vinyl‐2‐pyrrolidone content. The characterization and some selected properties of the prepared hydrogels were studied, and the possibility of their practical use in wastewater treatment for heavy metals such as Cu, Ni, Co, and Cr was investigated. The maximum uptake for a given metal was higher for a treated NVP/AAc hydrogel than for an untreated NVP/AAc hydrogel and was higher for an untreated NVP/AAc hydrogel than for an NVP/AAm hydrogel. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 2642–2652, 2004