Sorption of Cesium from Alkaline Solutions onto Resorcinol-Formaldehyde Sorbents

• Published in: Radiochemistry (New York, N.Y.) N.Y.), 2019-11, Vol.61 (6), p.714-718
• Main Authors: Milyutin, V. V., Zelenin, P. G., Kozlov, P. V., Remizov, M. B., Kondrutskii, D. A.
• Format: Article
• Language: English
• Subjects: Cesium 137; Cesium isotopes; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Computer simulation; Desorption; Formaldehyde; Ion exchange; Ion exchange materials; Ion exchangers; Noble metals; Nuclear Chemistry; Radiochemistry; Radioisotopes; Regeneration; Sorbents; Sorption; Storage tanks
• ISSN: 1066-3622; 1608-3288
• DOI: 10.1134/S1066362219060122

The performance of various phenolic ion exchangers in 137 Cs sorption was studied. Resorcinol-formaldehyde sorbents (RFSs) produced by Axion—Rare and Noble Metals Joint-Stock Company (Russia) of the AXIONIT RCs grade exhibit the best sorption parameters. Ion-exchange materials based on RFSs efficiently take up 137 Cs from solutions with pH > 10 in the presence of prevalent amounts of Na + and K + ions. Sorbents of AXIONIT RCs grade can be used in repeated sorption-desorption-regeneration cycles. Complete desorption of 137 Cs is reached on passing 5–10 column volumes of 0.5–1.0 M HNO 3 solutions. The possibility of using RFSs for 137 Cs removal from model solutions simulating NPP bottom residues and for treatment of real liquid high-level waste, clarified phase from HLW storage tanks of the Radiochemical Plant of the Mayak Production Association, to remove cesium radionuclides was demonstrated.