Availability of Zeolite as an Eliminant for the Incorporated Radionuclides (2)

—in vitro Adsorption Property of Zeolite for ⁵⁴Mn—

Abstract

Zeolite, one of the inorganic ion exchangers, is expected to be an eliminant for the incorporated⁵⁴Mn.In this study, effect of the manganese concentration and several coexisting metal ions on the adsorption of⁵⁴Mn to zeolite was examined in vitro.
In manganese chloride solution, zeolite adsorbed⁵⁴Mncompletely within its ion exchage capacity of 5.48 meq/g. The adsorption of⁵⁴Mnwas also measured in several mixed solutions containing manganese chloride and another metal salt. It was slightly suppressed with sodium, magnesium, and potassium; strongly suppressed with copper, strontium, and cerium. Separation factors of zeolite estimated with these results were as follows in the affinity order: copper>strontium>caesium, cerium, zinc>calcium>iron (II) >manganese, cobalt>potassium>sodium>magnesium.
These results suggest that zeolite is a useful agent for eliminating the incorporated⁵⁴Mnand it may be also effective for strontium and caesium owing to their high separation factors.