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Journals / Journal of the Turkish Chemical Society, Section A: Chemistry / 2021 / Cilt: 8 - Sayı: 3

Equilibrium, Kinetic Data, and Adsorption Mechanism for Lead Adsorption onto Polyacrylamide Hydrogel

Imane LEBKIRI, Brahim ABBOU, Lamya KADIRI, Abdelkarim OUASS, Abdelhay ELAMRI, Hanae OUADDARI, Omar ELKHATTABI, Ahmed LEBKIRI, El Housseine RIFI

Pages
731–748
DOI
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Abstract

The present study focuses on the effect of experimental parameters (pH, temperature, gelmass, metal concentration, contact time) on the performance of lead adsorption by polyacrylamidehydrogels. The results obtained showed that the retention of Pb2+ ions is closely linked to theseparameters. The adsorbent gels equilibrate with the metal solution after 180 minutes, and the maximumadsorption capacity is 442.31 mg/g. In addition, the adsorption obeys the pseudo-second-order kineticsand Langmuir isotherm. Desorption of the micropollutant retained by the hydrogel was also studiedusing 0.1 M of HCl solution. The desorption was rapid, and the efficiency exceeded 90% after a contacttime of 90 minutes.