Akademik Veri Yönetim Sistemi
Journal of Molecular Structure, cilt.1321, 2025 (SCI-Expanded)
The aim of this study was to prepare a hydrogel composite of chitosan and montmorillonite entrapped in PAAm (PAAmChMt) and to investigate its adsorption properties for Th4+ and bovine serum albumin (BSA). The structural characteristics of PAAmChMt were determined by a number of methods including FT-IR, XRD, SEM-EDX, TGA, BET-porosity analysis. The parameters defining adsorptive properties were consolidated by inspection of adsorption dependence on pH, concentration, kinetics, thermodynamics, and ionic strength. The structural evaluation tests affirmed the formation of the composite in a ternary combination. The isotherms acquired from the adsorption dependency on concentration of Th4+ and BSA were Type-I of IUPAC classification pointing out the high affinity of Th4+ and BSA to PAAmChMt. The concordance of experimentally obtained isotherms with the considered adsorption models was significant for both species. The magnitude of adsorption energy strengthened that the physicochemical nature of the sorption of Th4+ or BSA was Coulomb electrostatic interactions. The enthalpy and entropy changes were ΔH>0 and ΔS>0 for Th4+ and BSA sorption on PAAmChMt. This indicated that the Gibbs free enthalpy change was ΔG<0, i.e. the adsorption process was spontaneous. The coherence of the sorption kinetics with the first-order model was established by the Langmuir kinetics of Liu and Shen, after finding its interesting coherence with both pseudo-first/second-order models.