Removal of Pb^sup 2+^ Ions from Water by Poly(Acrylamide-co-Sodium Methacrylate) Hydrogels

• Published in: Water, air, and soil pollution Vol. 223; no. 7; p. 4355
• Main Authors: Kalagasidis Krusic, M, Milosavljevic, N, Debeljkovic, A, Üzüm, Ö B, Karada, E
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.09.2012
• Subjects: Acrylamide; Adsorbents; Adsorption; Aqueous solutions; Environmental monitoring; Experiments; Fourier transforms; Heavy metals; Hydrogels; Ions; Lead; Lead content; Light; Organic chemicals; Regression analysis; Sodium; Studies; Water pollution; Water treatment
• ISSN: 0049-6979; 1573-2932
• DOI: 10.1007/s11270-012-1200-y

The application of poly(acrylamide-co-sodium methacrylate) (AAm/SMA) hydrogel for the removal of Pb^sup 2+^ ions from aqueous solutions has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, and temperature. The Fourier transform infrared (FTIR) spectra showed that -NH2 and -COOH groups are involved in Pb^sup 2+^ ion adsorption. The obtained results were analyzed by pseudo-first-order, pseudo-second-order, and intraparticle diffusion models using both linear and nonlinear methods. It was found that the Pb^sup 2+^ ion adsorption followed pseudo-first-order kinetics. Nonlinear regression analysis of six isotherms, Langmuir, Freundlich, Redlich-Peterson, Toth, Dubinin-Radushkevich, and Sips, have been applied to the sorption data, while the best interpretation was given by Redlich-Peterson. Based on the separation factor, R ^sub L^, the Pb^sup 2+^ ion adsorption is favorable, while the negative values of [increment]G indicates that the Pb^sup 2+^ ion adsorption on the investigated hydrogel is spontaneous.[PUBLICATION ABSTRACT]