2013
DOI: 10.1002/ep.11854
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Application of poly(acrlymide‐co‐sodium methacrylate) hydrogels in copper and cadmium removal from aqueous solution

Abstract: The application of poly(acrylamide‐co‐sodium methacrylate) hydrogel for the removal of Cu2+ and Cd2+ ions from aqueous solutions has been investigated as a function of pH, adsorbent dose and temperature. FTIR spectra showed that –NH2 and –COOH groups are involved in both metal ions adsorption which followed pseudo‐first order kinetics. Non‐linear regression analysis of six isotherms, Langmuir, Freundlich, Redlich‐Peterson, Toth, Dubinin‐Radushkevich and Sips, have been applied to the sorption data, while the b… Show more

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Cited by 18 publications
(10 citation statements)
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“…The amount of metal ions adsorbed on the hydrogel surface depend on the affinity of Cu 2+ , Pb 2+ and Fe 3+ ions toward CMC‐g‐AMPS hydrogel, corresponding to the results reported earlier. The hydrogel surface with higher maximum adsorption capacity of metal ions, exhibited many smooth and shallow pores . In order to confirm the presence of Cu 2+ , Pb 2+ and Fe 3+ ions on CMC‐g‐AMPS hydrogel, EDX spectra of pure CMC‐g‐AMPS hydrogel and hydrogel adsorbed Cu 2+ , Pb 2+ and Fe 3+ ions are presented in Fig.…”
Section: Resultssupporting
confidence: 87%
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“…The amount of metal ions adsorbed on the hydrogel surface depend on the affinity of Cu 2+ , Pb 2+ and Fe 3+ ions toward CMC‐g‐AMPS hydrogel, corresponding to the results reported earlier. The hydrogel surface with higher maximum adsorption capacity of metal ions, exhibited many smooth and shallow pores . In order to confirm the presence of Cu 2+ , Pb 2+ and Fe 3+ ions on CMC‐g‐AMPS hydrogel, EDX spectra of pure CMC‐g‐AMPS hydrogel and hydrogel adsorbed Cu 2+ , Pb 2+ and Fe 3+ ions are presented in Fig.…”
Section: Resultssupporting
confidence: 87%
“…The SEM images clearly reveal a smooth surface with a small and shallow porous structure. This morphology arises when the cationic metal ions chelate with ionized carboxylate and sulfonate anions and is incorporated into the inner hydrogel structure, resulting in weaker electrostatic repulsion of the hydrogels network, and leading to a decrease in swelling degree and reduction of hydrogel pores . This reduction is different in the various metal ions.…”
Section: Resultsmentioning
confidence: 99%
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