Application of poly(acrlymide- co -sodium methacrylate) hydrogels in copper and cadmium removal from aqueous solution (original) (raw)

2013, Environmental Progress & Sustainable Energy

The application of poly(acrylamide-co-sodium methacrylate) hydrogel for the removal of Cu 21 and Cd 21 ions from aqueous solutions has been investigated as a function of pH, adsorbent dose and temperature. FTIR spectra showed that-NH 2 and-COOH groups are involved in both metal ions adsorption which 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 L , the Cu 21 and Cd 21 ions adsorption is favorable. The maximum adsorption of 24.05 mg=g (48%) for Cu 21 ions and 32.99 mg=g (66%) for Cd 21 ions has been obtained at pH 5.0 and sorbent dosage of 300 mg.

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