A study on sodalite pellets as matrix for spent chloride salts confinement. Issue 63 (20th February 2017)

• Record Type: Journal Article
• Authors: Capone, M.; Fedeli, C.; De Angelis, G.; Da Ros, M.; Giacobbo, F.; Giola, M.; Macerata, E.; Mariani, M.
• Is Part Of: MRS advances. Volume 1:Issue 63/64(2016)
• Page Start: 4261
• Page End: 4267
• Publication Date: 2017-02-20
• Subjects: ceramic, -- waste management, -- Cl; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2017.218
• Languages: English
• ISSNs: 2059-8521

Abstract

ABSTRACT: Pellets made of pure sodalite blended with commercial glass frit and pellets made of sodalite, glass frit and a mixture of chloride salts, synthesized through dry pressing and subsequent thermal treatment, were evaluated as a potential matrix for confinement of spent chloride salts coming from pyroprocesses. The sodalite pellets were leached at 23°C and 90°C for 28 days, according to the ASTM C1220-10 procedure. Normalized release rates were estimated for the following elements: Li, Na, Al, Si, K, Rb, Cs, Sr, Ba, La, Nd and compared with literature results. SEM investigations, carried out before and after the leaching tests, show dissolution and re-precipitation phenomena at 90°C.