Poly(N,N′-dimethylacrylamide-co-acrylic acid): Synthesis, characterization, and application for the removal and separation of inorganic ions in aqueous solution

✍ Scribed by B. L. Rivas; S. A. Pooley; M. Soto; H. A. Maturana; K. E. Geckeler

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 353 KB
• Volume: 67
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19980103)67:1<93::aid-app11>3.0.co;2-6

✦ Synopsis

The synthesis of poly( N,N-dimethylacrylamide-co-acrylic acid) under different feed molar ratios was carried out by radical polymerization. Both homopolymers were also synthesized to compare the metal ion binding abilities. All polymers were water-soluble and were characterized by FTIR, 1 H-NMR, 13 C-NMR, and TGA. The metal complexing properties for the metals Cu(II), Co(II), Ni(II), Cd(II), Zn(II), Pb(II), Hg(II), Cr(III), and Fe(III) in the aqueous phase were investigated using the liquid-phase polymer-based retention (LPR) method. The metal ion interactions with the hydrophilic polymer were determined as a function of pH and the filtration factor. According to the interaction pattern obtained, the metal ions form the most stable complexes with the copolymer poly( N,N-dimethylacrylamide-co-acrylic acid) within the pH range 5-7. Hg(II) was not retained at all the pH ranges investigated.