Extraction of 99Tcm From 99Mo by Activated Carbon Fiber
-
Graphical Abstract
-
Abstract
Using chromatography for extracting medical isotope 99Tcm from 99Mo is a potential way to deal with the current fission-based 99Mo supply crisis. The process and properties of activated carbon fiber separating 99Tcm from mother nuclide 99Mo were studied by static and dynamic adsorption experiments. The results show that activated carbon fiber can selectively adsorb pertechnetate ions in 3 mol/L NaOH solution. The equilibrium time is about 500 s, and the adsorption, with 32.47 mg/g of saturated adsorption capacity, follows the pseudo 2nd order kinetic model. In the dynamic adsorption elution experiment, the break-through volume of 1.0 g activated carbon fiber chromatographic column is 70 mL, and pertechnetate is effectively eluted from activated carbon fiber chromatographic column in 40 mL water. The research results show that chromatographic column of activated carbon fiber can be used for separation of technetium from molybdenum without organic solvent. The yield of technetium is 98%, and residual concentration of molybdenum is 3.5 mg/L in eluates.
-
-