Adsorption Equilibrium, Kinetics, Thermodynamics and Dynamic Separation of Magnesium and Calcium Ions from Industrial Wastewater by New Strong Acid Cation Resin of SPVC
Abstract
In the research work, the adsorption equilibrium, kinetics, thermodynamics and dynamic
separation of magnesium and calcium ions from industrial wastewater by new strong acid cation
resin of SPVC (sulphonated polyvinylchloride) were investigated. The sorption capacity of the
studied resin was 3.78 mmol/g and 3.74 mmol/g for magnesium and calcium ions, respectively,
according to Langmuir isotherm. It was found that the pseudo−first−order model was better fitted
for the adsorption kinetics of magnesium and calcium ions on the resin. The dynamic separation
results confirmed that the selected resin effectively separated magnesium and calcium ions from
industrial wastewater in the dynamic condition. The change of the standard Gibbs free energy
(G) and enthalpy (H), and entropy (S) were calculated. The obtained results confirmed that
the adsorption of magnesium and calcium ions on the selected resin is endothermic.
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