Speaker
Fabio Fattori
(Politecnico di Milano)
Summary
Radioactive waste (RW) conditioning is a crucial step in producing durable waste forms capable of safely immobilising radionuclides. In recent years, geopolymers have gained attention as alternatives to conventional cementitious materials for low- and intermediate-level RWs. Alkaline geopolymers have shown high retention for several cations, especially the highly mobile fission product 137Cs+. However, their performance is much less satisfactory for radionuclides such as 99Tc, 93Mo, 79Se, 36Cl, and 129I, which typically occur as anionic species. To address this challenge, phosphate-based geopolymers (PGPs) activated with phosphoric acid have demonstrated greater efficiency in immobilising anions, owing to their positive surface charge.
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Author
Fabio Fattori
(Politecnico di Milano)
Co-authors
Dr
Gabriele Magugliani
(Politecnico di Milano)
Dr
Davide Comboni
(Università degli Studi di Milano)
Prof.
Giacomo Diego Gatta
(Università degli Studi di Milano)
Dr
Alessandro Girella
(Università degli Studi di Pavia)
Prof.
Chiara Milanese
(Università degli Studi di Pavia)
Simona Sandalova
(Politecnico di Milano)
Francesco Galluccio
(Politecnico di Milano)
Dr
Elena Macerata
(Politecnico di Milano)
Mario Mariani
(Politecnico di Milano)
Eros Mossini
(Politecnico di Milano)
