DIPHONIX resin

The vendors state that data from bench- and pilot-scale evaluations of Diphonix resin should only be used as a general guide to applications of the technology to real-world applications. Each use of the technology will likely require site- and waste-specific evaluations before the initiation of treatment. Some metals (i.e., iron and aluminum) can interfere with the extraction of targeted radionuclides in mixed-waste applications. 

According to the vendor, Diphonix s affinity for actinide ions over more predominant cation species makes metal removal by ion exchange resins economically feasible. The resin produces a concentrated waste stream that reduces the total volume of waste requiring disposal (D20304T,... 

The tetraethyl ester of 1,1-vinylidenediphosphonic acid has been used to make cross-linked copolymers which are ion-exchange resins with selective chelation properties for toxic metal cations (78). An alternative method for introducing the diphosphonic acid structure is by reaction of a methylenediphosphonic ester with chloromethylated styrene copolymer beads (79). At least one such resin class, Diphonix, also containing sulfonic acid and other functional groups, has shown promise for treatment of radioactive waste and for iron control in copper electrowinning (80,81). 

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