Purification of nuclear power plant decontamination solutions by preparative scale reactive absorption

Preparation of montmorillonite@carbon composite and its application for U(VI) removal from aqueous solution

“…Sorption is preferred because of its low cost, simplicity of design and operation, especially application for effluents with moderate and low concentrations [6,7]. Up to now, many works has been done on the sorption of uranium to various sorbents including minerals, oxides, carbon materials, and so on [8][9][10][11][12][13]. However, these materials have inherent defects.…”

Application of sorption-reagent materials in the technology of liquid radioactive waste treatment

“…the coprecipitation of strontium and metal with formation of the mixed precipitate as (2) the hydrolysis of the metal silicate proceeding in the presence of sulfate-ions as…”

“…The reaction of barium silicate with sulfate ions results in substantial changes in the selectivity of strontium removal from solutions containing calcium ions due to the occurrence of reactions (1) and (2). Here, the strontium distribution coefficient increases dramatically, along with the increase in the concentration of sulfate-ions above some critical value that is individual for any sorption-reagent system.…”

“…A typical example of such a process is concerned with the sorption properties of the nanosized iron in the zero oxidation state, which becomes an extremely active sorbent of toxic elements during oxidation in an aqueous solution, for instance, by air oxygen or other oxidizers [1]. Another example of this sorption-reagent material is the activated carbon in a solution containing permanganateions [2,3]. In this case, by oxidizing the activated carbon, the permanganate-ion forms hydrated manganese(IV) oxide that in particular sorbs different transition metal radionuclides [4].…”