“…Thus, this work aims to study the ion exchange characteristics of Pb 2þ with 732-CR in H þ form, including kinetics, mechanisms, isotherms, and thermodynamics, in a batch mode in order to validate its practical application in laboratories [20] and industry wastewater [21] treatment, especially at high concentrations. The kinetic data were described by different kinetic models: the Nernst-Planck equation and unreacted-core model (UCM).…”