Efficient sorption of light rare-earth elements using resorcinol-formaldehyde polymeric resin |
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| Authors: | S. A. Shady M. F. Attallah E. H. Borai |
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| Affiliation: | (1) Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA;(2) Department of Chemical Engineering, Prairie View A&M University, Prairie View, TX 77446, USA |
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| Abstract: | The sorption behavior of light rare-earth elements (La, Ce, Nd, Sm) on resorcinol-formaldehyde (RF) resin was studied. The effect of pH, shaking time, and temperature on the metal distribution coefficients was examined. The RF resin affinity for the examined lanthanides increases with a decrease in the ionic radius of the metal ion: Sm > Ce > Nd > La. The capacity of RF resins for the lanthanides shows the same trend. Because of the relatively high capacity of the resin, the presence of interfering ions affects the sorption percentage of the light REEs insignificantly. The thermodynamic functions of the sorption process were determined. They show that the adsorption of the light lanthanides on RF resin occurs spontaneously with the dehydrated metal ion. |
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