title: Kinetic, equilibrium and thermodynamic studies on sorption of uranium and thorium from aqueous solutions by a selective impregnated resin containing carminic acid.
abstract: In this work, the removal of uranium and thorium ions from aqueous solutions was studied by solid-liquid extraction using an advantageous extractant-impregnated resin (EIR) prepared by loading carminic acid (CA) onto Amberlite XAD-16 resin beads. Batch sorption experiments using CA/XAD-16 beads for the removal of U(VI) and Th(IV) ions were carried out as a function of several parameters, like equilibration time, metal ion concentration, etc. The equilibrium data obtained from the sorption experiments were adjusted to the Langmuir isotherm model and the calculated maximum sorption capacities in terms of monolayer sorption were in agreement with those obtained from the experiments. The experimental data on the sorption behavior of both metal ions onto the EIR beads fitted well in both Bangham and intra-particle diffusion kinetic models, indicating that the intra-particle diffusion is the rate-controlling step. The thermodynamic studies at different temperatures revealed the feasibility and the spontaneous nature of the sorption process for both uranium and thorium ions.
authors.affiliation: Wastewater Division, Faculty of Health, Sabzevar University of Medical Sciences, PO Box 319, Sabzevar, Iran.
authors.forename: Abolfazl
authors.initials: A
authors.lastname: Rahmani-Sani
authors.affiliation: Wastewater Division, Faculty of Health, Sabzevar University of Medical Sciences, PO Box 319, Sabzevar, Iran; Department of Engineering, Kashmar Branch, Islamic Azad University, PO Box 161, Kashmar, Iran. Electronic address: ahoseinib@yahoo.com.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Hosseini-Bandegharaei
authors.affiliation: Department of Engineering, Kashmar Branch, Islamic Azad University, PO Box 161, Kashmar, Iran.
authors.forename: Seyyed-Hossein
authors.initials: SH
authors.lastname: Hosseini
authors.affiliation: Water Division, Department of Engineering, Torbat-e-Hydarieh Branch, Islamic Azad University, PO Box 121, Torbat-e-Hydarieh, Iran.
authors.forename: Keivan
authors.initials: K
authors.lastname: Kharghani
authors.affiliation: Department of Engineering, Kashmar Branch, Islamic Azad University, PO Box 161, Kashmar, Iran.
authors.forename: Hossein
authors.initials: H
authors.lastname: Zarei
authors.affiliation: Wastewater Division, Faculty of Health, Sabzevar University of Medical Sciences, PO Box 319, Sabzevar, Iran; Department of Engineering, Kashmar Branch, Islamic Azad University, PO Box 161, Kashmar, Iran.
authors.forename: Ayoob
authors.initials: A
authors.lastname: Rastegar
mesh_terms: D000327:Adsorption; D002329:Carmine / Q000737:chemistry*; D002627:Chemistry, Physical; D004058:Diffusion; D006863:Hydrogen-Ion Concentration; D007477:Ions; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D013816:Thermodynamics; D013910:Thorium / Q000737:chemistry*; D014501:Uranium / Q000737:chemistry*; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D007477:Ions; D008670:Metals; D011108:Polymers; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; C074337:Amberlite XAD-16; D014501:Uranium; D013910:Thorium; D002329:Carmine
keywords: Amberlite XAD-16; Carminic acid; Extractant-impregnated resin; Sorption; U(VI) and Th(IV) ions