World Journal of Nuclear Science and Technology · 2011 · 65 citations · 30 references
Natural SciencesChemical EngineeringChemistryPhysical ChemistrySurface ChemistrySurface ScienceAdsorption ProcessesAdsorptive SeparationsSurface AdsorptionSurface PhysicsSurface Reaction KineticsSurface ReactionsAdsorbent CharacterizationAdsorption IsothermsAdsorption KineticsAdsorption ThermodynamicsChemical AdsorptionContact Time EffectsEquilibriumZeolite Adsorbents
This work reports the adsorption of strontium from aqueous solutions onto PAN/zeolite composite. The strontium adsorption on the composite adsorbent was studied as a function of initial strontium concentration, pH of the solution, contact time and temperature. Adsorption isotherms like Langmuir, Freundlich,Dubinin–Radushkevich (D–R) and Temkin were used to analyze the equilibrium data at the different concentrations.Adsorption process well fitted to Temkin isotherm model. Thermodynamic parameters such as the changes in enthalpy, entropy and Gibbs’ free energy were determined, showing adsorption to be an exothermic and spontaneous process.
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