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The adsorption kinetics and mechanism of a novel chelate resin, macroporous phosphonic acid resin (PAR) for In(III) were investigated. The statically saturated adsorption capacity is 216mg穏-1resin at 298K in HAc-NaAc medium. The apparent adsorption rate constant is k298=4.84?0-5 s-1. The adsorption behavior of PAR for In(III) obeys the Freundlich isotherm. The thermodynamic adsorption parameters, enthalpy change △H, free energy change △G and entropy change △S of PAR for In(III) are 11.5kJ/mol, -12.6kJ/mol and 80.8J/mol稫, respectively. The apparent activation energy is Ea=3.5kJ/mol. The molar coordination ratio of the functional group of PAR to In(III) is about 3∶1.
The adsorption kinetics and mechanism of a novel chelate resin, macroporous phosphonic acid resin (PAR) for In (III) were investigated. The statically saturated adsorption capacity was 216 mg 穏 -1resin at 298K in HAc-NaAc medium. The adsorption behavior of PAR for In (III) obeys the Freundlich isotherm. The thermodynamic adsorption parameters, enthalpy change ΔH, free energy change △ G and entropy change △ S of PAR for In The apparent activation energy is Ea = 3.5 kJ / mol. The molar coordination ratio of the functional group of PAR to In (III) is 11.5 kJ / mol, -12.6 kJ / mol and 80.8 J / is about 3: 1.