Open AccessAdsorption Equilibrium, Kinetics, Thermodynamics and Dynamic Separation of Magnesium and CalciumIons from Industrial Wastewater by New Strong Acid Cation Resin of SPVC
Author(s) -
Elyor Berdimurodov
Publication year - 2021
Publication title -
pakistan journal of analytical and environmental chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.155
H-Index - 3
eISSN - 2221-5255
pISSN - 1996-918X
DOI - 10.21743/pjaec/2021.06.13
Subject(s) - adsorption , magnesium , gibbs free energy , chemistry , enthalpy , endothermic process , langmuir adsorption model , sorption , inorganic chemistry , kinetics , thermodynamics , organic chemistry , quantum mechanics , physics
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.