Abstract
<p>The adsorption behavior of uranium and thorium from aqueous solutions by By-pass cement dust (BCD) has been investigated by a batch technique. The uranium and thorium adsorption on BCD was studied as a function of initial concentration, weight of BCD, pH, shaking time and temperature. The uptake of uranium and thorium at the determined optimum conditions follows Freundlich isotherm. The adsorption control of both thorium and uranium are first order and uptake energy of activation E<sub>a</sub> =10 and 15 kJ/mol for thorium and uranium respectively. Thermodynamic parameters such as ΔH<sup>o</sup>, ΔS<sup>o</sup> and ΔG<sup>o</sup> were also investigated.</p>
Highlights
Pollution with radioactive elements has been a matter of great concern for the last decades for hu-m man health and animals
Various techniques are employed for the removal of uranium ions from wastewaters and radioactive wastes
Adsorption of uranium (VI) onto various solids is important from purification, environme-n ntal and radioactive waste disposal points of view [10,11]
Summary
Pollution with radioactive elements has been a matter of great concern for the last decades for hu-m man health and animals. The adsorbent material (BCD) (0.01 g) and standard aqueous solution of uranium and thorium (50 ml) were shaken at differrent temperatures for various mixing time.
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