ИСТИНА

Cementing of radioactive waste is the simplest and cheapest method of curing radioactive waste. However, some radionuclides contained in RAW may not be included in the cement matrix, since they have a high degree of leachability and are therefore easily washed by groundwater. One such radionuclide is technetium. The purpose of this paper is to search for a stabilizing ligand. The following substances were selected as stabilizing ligands: 1) PGMH-hydrochloride (polyhexamethyleneguanidine hydrochloride, 2) TFF-chloride (tetraphenylphosphonium chloride), 3) Polyethylenimine (PEI), 4) Thiourea. 5) Chitosan is a polysaccharide. This procedure would form insoluble complexes with technetium and promote strong retention of technetium in the cement compound. In the course of mechanical tests, an optimal water-cement ratio of 0.5 was chosen, which will be used later in the evaluation of leaching. The leachability assessment of the pertechnetate ion at the cement samples revealed that PGMH-HCL is the most efficient for retaintion the pertechnetate ion in the cement matrix.