Separation of uranium and some rare earth elements from acidic contaminated waste using diamide chelating resins - abs53

N,N,N',N'-tetramethyl-malonamide (TMMA) chelating resin was synthesized by chemically bonding the functional group to the main chain of chloromethylstyrene - divinylbenzene co polymer beads. The resin characterizations in terms of infrared spectroscopy, pore diameter, and elemental analysis were studied. The uptake behavior of Ce(III) ions and of U(VI) ions from different acidic media was investigated using batch technique. The equilibrium studies showed that the obtained resin is adequate for the separation of these ions from acidic media. The utilization of the resin for the removal U(VI) ions and Ce(III) ions on laboratory scale fixed bed column was studied. The column operation results proved that the resin is more promising compared with dihexyl-N,N-diethyl-carbamoylmethyl-phosphonate (CMP) chelating resin. (authors)