caesium sulphate in 200 ppm solution hydroxide spiked with radioactive cs 137 tracer concentrations of caesium in solution as a function of time were measured using gamma spectrometry to monitor the concentration of caesium in samples withdrawn from the solution 10 mls of 34 wet 34 resin equivalent to 1 7 g of dry resin were mixed with 100 mls of the solution and vigorously agitated the absorption of caesium by the caesium selective magnetic resin composite is shown in table 1 table 1______________________________________ caesium remaining in solutiontime initial value mins clinoptilolite zeolon 900______________________________________ 3 21 5 10 110 5 9 5 660 2 0 1 7960 0 9 0 8______________________________________ after washing and magnetic filtration the caesium loaded particles were regenerated the regeneration properties of the resin composite were tested by introducting the composite to 250 mls of a solution of ammonium carbonate 2 mole dm 3 in ammonium hydroxide 2 mole dm 3 concentrations of caesium in solution as a function of time were measured using gamma spectrometry to monitor the concentration of caesium in samples withdrawn from the solution the elution of caesium from the caesium selective magnetic resin composite is shown in table 2 note that since batch equilibration was employed it is likely that more caesium could be removed by equilibration with fresh solution table 2______________________________________ caesium elutedtime initial value mins clinoptilolite.