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A.A. Naser,S.S. Metwally,G.E. Sharaf El-deen,Ahmed A. Bhran,A.M. El-Kamash 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.32 No.-
Silica-based urea–formaldehyde (SiO2/UF) composite material was prepared and impregnated withorganophosphorus extractant, namely; 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester, forremoval of Eu3+ and Nd3+ from aqueous solutions. The sorption capacity of the impregnated SiO2/UF forEu3+ and Nd3+ were determined and found to be 3.1 and 2.8 meq/g, respectively. Pseudo-second-orderkinetic model is applicable and the sorption process is controlled by intra-particle diffusion mechanism. The values of thermodynamic parameters indicated that the sorption process is spontaneous and hasendothermic nature. The prepared impregnated composite is an efficient sorbent media andrecommended for removal of some lanthanide elements from aqueous solution