Pre-concentration of actinoids from waters: a comparison of various sorbents

The first part of comparison study was based on the properties of different sorbents. These included different forms of manganese oxides, and specific organic ion-exchangers: HYPHAN and POLYORGS. In order to provide reproduci ble samples with moderate presence of possible interferences, spiked tap wa ter was used for this first set of experiments. Results indicate that the s orption of Th, U, Pu and Am varies for different forms of manganese oxides. These variations are attributed to different physico-chemical properties o f the oxides. HYPHAN was limited in its sorption to Th and U. The manganese oxide dissolved rapidly and the radiochemical separation procedure was qui ck and simple using extraction chromatography techniques. The radionuclides in the water samples were determined by ICP-MS and/or alpha spectrometry. (C) 2000 Published by Elsevier Science Ltd. All rights reserved.