Sorption of CH3 131I from water vapor-air medium on porous inorganic sorbents containing triethylenediamine and d element nitrates

Abstract

Sorption of CH3131I from a water vapor-air medium on porous inorganic sorbents based on silica gel of KSKG grade and containing triethylenediamine (CH2-CH2)3N2 and d element nitrates was studied. The sorbents prepared by impregnation with (CH2-CH2)3N2 and Zn, Ni, and Cu nitrates from aqueous solution recover CH3131I from a water vapor-air flow poorly (degree of recovery <10%). Calcination of the sorbents at temperatures exceeding 250°C does not noticeably affect their sorption power. Heating of the complex Ag(NO3)(OH)·(CH2-CH2)3N2H to 160°C causes its exothermic decomposition with a large heat release and formation of metallic silver. Thermal decomposition of the complex of Cu2+ with (CH2-CH2)3N2, synthesized from an aqueous solution at the molar ratio Cu(NO3)2: (CH2-CH2)3N2 = 1: 2, occurs similarly.