Synthesis and Characterization of Functionalized activated Carbon for Removal of Uranium and Iron from Phosphoric Acid
A. A. Abdel-SamadM. M. Abdel Aal, E. A. Haggag, Walid Mohamed Youssef
Uranium and iron sorption from synthetic phosphoric acid was carried out onto activated pistachio nut. This activated carbon was modified by adding some functional groups which have great ability to attract uranium from its solution. The different factors affecting uranium and iron adsorption have been investigated. The obtained results clear that, the sorption preferred conditions were; solution pH of 3, shaking time of 60 min., room temperature, and adsorbent amount is 1g/L. Based on kinetic modeling investigation, the sorption process of uranium and iron is following to pseudo-second order mechanism. From the results, the uranium and iron sorption from synthetic phosphoric acid, with only about 3% loss of P2O5, onto activated pistachio nut was found to occur through physical sorption process. The adsorption process has been found to agree with the Langmuir isotherm and confirms with the concept of the matrix diffusion controls according to Homogeneous Particle Diffusion Model (HPDM).