Abstract
Crosslinked polyacrylamide hydrogel was used in the adsorption of heavy metals; lead, copper, and cadmium. The effect of different parameters, pH, temperature, and concentration of the metallic solution on the adsorption were studied. The metal ion removal capacities changed depending on the nature of the metal, the PAAM hydrogel were highly selective to Pb(II) ions. Under optimal conditions, the maximum adsorption capacity of Pb(II) Cu(II), and Cd(II) were 442.31, 331.59, and 216.26 mg/g, respectively. In addition, the research of kinetics and isotherms displayed that the pseudo-second-order kinetic model and the Langmuir isotherm model fitted the data well regardless of the adsorbed metal studied. PAAM was also regenerated over multiple adsorption cycles without any appreciable loss of its adsorption capacity.
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ACKNOWLEDGMENTS
We gratefully acknowledge the Technical Support Units for Scientific Research (UATRS) under the National Center for Scientific and Technical Research (CNRST), especially to Hanae OUAADARI for the analytical services and instrumentations. We also thank our laboratory members for their generous help.
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Lebkiri, I., Abbou, B., Kadiri, L. et al. Polyacrylamide Hydrogel an Effective Adsorbent for the Removal of Heavy Metal from Aqueous Solution: Isotherm, Kinetic, and Thermodynamic Studies. Russ. J. Phys. Chem. 96, 1484–1492 (2022). https://doi.org/10.1134/S0036024422070159
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DOI: https://doi.org/10.1134/S0036024422070159