Removal of thorium(IV) ions from aqueous solution by polyacrylamide-based monoliths: equilibrium, kinetic and thermodynamic studies

In this study, a series of macroporous polyacrylamide-based monoliths bearing negatively charged interaction sites were synthesized as adsorbents for effective removal Th4+ from aqueous solutions. The effects solution pH, contact time, monolith dosage, initial concentration, and temperature on adsorption process was studied. Langmuir, Freundlich, Dubinin–Raduskevich isotherms applied to describe the data. equilibrium data best fitted with both Freundlich Langmuir models. experimental kinetic well described by pseudo-second order kinetic. Thermodynamic studies revealed that onto an endothermic spontaneous process.