The effect of organic impurities on the efficiency of strontium removal by sorbents based on manganese oxide

This work presents the results of evaluating the effect of some organic compounds on the efficiency of strontium removal by a granular sorbent based on manganese oxide. Sodium dodecyl sulfate has not a noticeable effect on the sorption characteristics of the sorbent. It has been shown that Trilon-B in concentrations up to 10 –3 mol/L has a positive effect on the efficiency of strontium removal, which is, probably, the result of the processes of partial reduction of the surface of the material. Under dynamic conditions, the presence of Trilon-B leads to rapid destruction of the sorbent due to the formation of Mn-EDTA complexes. The presence of humic and fulvic acids in the solution at a concentration of less than 10 –4 g/L in neutral media increases the efficiency of strontium removal in micro- and macro-concentration. Under dynamic conditions, the presence of humic acid increases the value of the effective filter cycle up to 50% breakthrough by 1.9 times compared to the control experiment; however, it reduces the value of the decontamination factor coefficient due to the formation of Sr-HA complexes.