Resorcinol-Formaldehyde Resins for Cesium Removal from Solutions Produced after Processing Spent Ion-Exchangers

Abstract:

A series of resorcinol-formaldehyde resins (RFR) has been prepared and studied in terms of Cs-137 uptake efficiency from solutions (0.75М NaOH-2.25M NaNO₃) intended for processing spent ion-exchangers. Sample synthesized at molar ratio of resorcinol to formaldehyde of 1.8:2.2 and solidified at 210 °C (sample RFR-3-1-210) has shown the best sorption-selective performance and chemical stability. Implementing RFR in dynamic sorption scheme enables to reduce its decay due to short contact time. In dynamic conditions, after feeding 1000 bed volumes of the solution, RFR 3-1-210 maintains its sorption properties after 6 sorption-desorption cycles.

• Periodical: Key Engineering Materials (Volume 842)
• Pages: 107-114
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.842.107
• Online since: May 2020
• Authors: Eduard Tokar'*, Marina Palamarchuk, Mikhail V. Tutov, Anna Matskevich, Andrei Egorin
• Keywords: Cesium-137, Decontamination, Resorcinol Formaldehyde Resin, Sorption

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