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Poly(acrylamide-co-2-acrylamide-2-methyl-1-propane sulfonic acid) P(AAm-co-APSA) copolymers have been prepared to be used in the extraction of Pb(II), Hg(II), Cd(II), Zn(II), Al(III), and Cr(III) metal ions from aqueous solution by a batch and column equilibration procedures. The adsorption capacity was increased with pH for all metal ions studied. The contact time and the temperature did not affect the retention significantly. The resin did not show a preference in a mixture of Pb(II), Cd(II), Zn(II), and Cr(III). V C 2010Wiley Periodicals, Inc. J Appl Polym Sci 120: [586][587][588][589][590][591] 2011

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Copolymers obtained from polyvinyl alcohol (PVA) containing substituted triazole pendant groups were synthesized via "click" reactions. The chemical structures of the new copolymers with hydroxyl methyl (PVATPHM) or protected galactosyl groups (PVATPGal) as substituents were characterized by spectro scopical analysis (FTIR, 13 C NMR, and 1 H NMR spectroscopies) as well as the thermal properties were analyzed by TGA and DSC techniques. Interactions studies with heavy metal ions, such as Cd 2+ , Zn 2+ , Hg 2+ , and Cu 2+ , in aqueous solutions were carried out. Ion sorption was evaluated taking into account pH, time, and concentration. Results of competitive selectivity assays were also analyzed. PVATPHM was capable to remove all the analyzed metal ions in different experimental conditions. Furthermore, the PVATPGal showed excellent capacity for lead removal with maximum adsorption capacity at pH 1.0 and the heavy metal can be desorbed using ethylenediaminetetraacetic acid.Correspondence to: