Radioactive Metal Isotopes Stabilized in a Geopolymer Matrix: Determination of a Leaching Extract by a Radiotracer Method

The stabilization of radioactive metal ions in inorganic polymer matrices of aluminum silicates, also called geopolymers, is demonstrated. The strength of the metal–ion bonds was then tested by leaching in water and sulfuric-acid solutions. The experiments were carried out by the radioactive-tracer method with 152Eu, 134Cs, 60Co, and 59Fe isotopes.