Study of Technetium Sorption Behavior on Nanodiamonds Using 99,99mTc Isotopes.

Nanodiamonds (NDs) were investigated as potential carriers of 99mTc, which is widely used for the diagnosis of diseases in nuclear medicine. The sorption of 99Tc(VII), 99mTc(VII), and 99mTc(IV) by commercial NDs and their reduced, aminated, and oxidized forms was studied. The physicochemical parameters of the Langmuir and Freundlich isotherms for the sorption of 99Tc(VII) by the used ND samples were determined. The Sn(II): Tc(VII) ratio for the quantitative reduction of Tc to the oxidation state IV was optimized. It was shown that the initial (commercial) and oxidized NDs are promising carriers of 99mTc(IV) for nuclear medicine. [ABSTRACT FROM AUTHOR]