Abstract
Sorption of 131I and 137Cs from a solution simulating NPP trap waters on various inorganic and organic sorbents was studied. The highest degree of 131I recovery (>99%) can be attained with Fizkhimin granulated sorbents based on coarsely porous silica gel containing Ag and Ni in 1: 4 ratio, with Kd for 131I exceeding 105 ml g−1 at V/m = 103 ml g−1 and contract time of the solid and liquid phases of 120 min. Elevation of the solution temperature to 40°C does not affect the degree of 131I and 137Cs recovery. The degree of 137Cs recovery in all the experiments did not exceed 35%. The degree of 131I recovery by coprecipitation with AgCl and Ag4[Fe(CN)6] was about ∼96% and only 65%, respectively.
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