Kinetics and thermodynamics studies for the removal of Co2+ and Cs+ from aqueous solution by sand and clay soils
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E.A. El-Sofany
Abstract
The adsorption parameters of local yellow sand and clay towards cobalt and cesium were investigated by batch equilibration technique. The influences of equilibration time, initial metal concentration, solution pH, volume of aqueous solution to weight of adsorbent ratio and temperature have been studied and discussed. Cobalt and cesium removal from 0.1 M sodium chloride solution were quantitatively evaluated using Langmuir and Freundlich isotherm models. The two tested models fit the data reasonably well. The maximum removal capacity of clay was found to be greater than that of yellow sand for both ions and the mean free energy in all cases in the range corresponding to ion exchange mechanism. The values of the first order rate constants, the rate constants of intraparticle transport and the particle diffusion coefficients for cobalt and cesium ions were determined from the graphical representation of the proposed models. The removal studies were also performed at different temperatures to obtain the thermodynamic parameters of the process.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Artikel in diesem Heft
- Activity standardization of 41Ca by means of liquid scintillation counting
- Development of extraction chromatographic separation procedures for the simultaneous determination of actinides
- Leach rates of uranium and thorium from murataite ceramics
- Kinetics and thermodynamics studies for the removal of Co2+ and Cs+ from aqueous solution by sand and clay soils
- Potential interferences on the pertechnetate-sulfide immobilization reaction
- Sorption profile of cadmium ions onto styrene-divinylbenzene copolymer beads
- Preparation and biological evaluation of [67Ga]-labeled-superparamagnetic nanoparticles in normal rats
- Preparation, quality control and biological evaluation of 99mTc-labelled cationic steroid antibiotic (CSA-13)
