Abstract: A waste extraction system that includes a column set positioned between and fluidly coupled to an upstream segment of a main waste pathway and a column effluent tank, the column set having a uranium adsorption column fluidly coupled to a supporting adsorption column along the main waste pathway. The uranium adsorption column is upstream the supporting adsorption column. The waste extraction system also includes a strip waste pathway extending from the uranium adsorption column to the column effluent tank bypassing the supporting adsorption column, an anion exchange resin housed in the uranium adsorption column, and a cation exchange resin housed in the supporting adsorption column.

Abstract: Provided herein are methods for isolating an isotope using cation exchange and a multi-step elution process.

Abstract: Provided herein methods of purifying a chemical element (e.g. radioisotope) involving the use of sacrificial metal dopants and/or radical scavengers during chromatographic separation of the desired element, thereby mitigating undesirable radiolysis.

Abstract: A method of radionuclide waste extraction includes directing a waste stream from an upstream segment of a main waste pathway into a waste stream input of an anion exchange column, wherein the waste stream comprises uranium and a target radionuclide, the anion exchange column houses an anion exchange resin, a cation exchange column housing a cation exchange resin is fluidly coupled to the anion exchange column downstream the anion exchange column, and a sluicing preparation tank is fluidly coupled to the anion exchange column. The method further includes adsorbing uranium from the waste stream onto an anion exchange resin, directing the waste stream from the anion exchange column into the cation exchange column, adsorbing the radionuclide onto the cation exchange resin, removing spent anion exchange resin from the anion exchange column, and directing fresh anion exchange resin from the sluicing preparation tank into the anion exchange column.

Abstract: A waste extraction system includes a precipitation tank comprising a waste stream input, a solution input, and a waste stream output, wherein the waste stream input is fluidly coupled to an upstream segment of a main waste pathway, a column effluent tank, an adsorption column positioned between and fluidly coupled to the precipitation tank and the column effluent tank along the main waste pathway, wherein the adsorption column houses an ion exchange resin and is positioned downstream the precipitation tank, a solution pathway extending from a solution source to the solution input of the precipitation tank, the solution source housing an alkaline solution, and a particle filtration unit positioned between and fluidly coupled to the precipitation tank and the adsorption column.

Abstract: A waste extraction system that includes a column set positioned between and fluidly coupled to an upstream segment of a main waste pathway and a column effluent tank, the column set having a uranium adsorption column fluidly coupled to a supporting adsorption column along the main waste pathway. The uranium adsorption column is upstream the supporting adsorption column. The waste extraction system also includes a strip waste pathway extending from the uranium adsorption column to the column effluent tank bypassing the supporting adsorption column, an anion exchange resin housed in the uranium adsorption column, and a cation exchange resin housed in the supporting adsorption column.

Abstract: Disclosed herein are extraction chromatographic supports comprising a porous support, an inert filler, and metal ion binding extractant that may be used for chromatographic separation of metal ions. Also disclosed herein are methods for preparing and using the extraction chromatographic supports.

Abstract: Disclosed herein are extraction chromatographic supports comprising a porous support, an inert filler, and metal ion binding extractant that may be used for chromatographic separation of metal ions. Also disclosed herein are methods for preparing and using the extraction chromatographic supports.