Effect of the Resorcinol/Formaldehyde Ratio and the Temperature of the Resorcinol–Formaldehyde Gel Solidification on the Chemical Stability and Sorption Characteristics of Ion-Exchange Resins
Eduard Tokar,
Mikhail Tutov,
Pavel Kozlov,
Arseni Slobodyuk,
Andrei Egorin
Affiliations
Eduard Tokar
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159, Prosp. 100-Letiya Vladivostoka, 690022 Vladivostok, Russia
Mikhail Tutov
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159, Prosp. 100-Letiya Vladivostoka, 690022 Vladivostok, Russia
Pavel Kozlov
FSUE “Mayak Production Association”, The Department of Chemistry and Chemical Technology, Prosp. Lenina 31, 456780 Ozersk, Russia
Arseni Slobodyuk
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159, Prosp. 100-Letiya Vladivostoka, 690022 Vladivostok, Russia
Andrei Egorin
Institute of Chemistry, Far Eastern Branch, Russian Academy of Sciences, 159, Prosp. 100-Letiya Vladivostoka, 690022 Vladivostok, Russia
A series of resorcinol–formaldehyde resins (RFR) samples for Cs-137 removal from liquid alkaline media have been synthesized. It has been demonstrated that the chemical stability as well as sorption characteristics are determined by the resorcinol/formaldehyde molar ratio and the solidification temperature. It has been also demonstrated that the sample synthesized at the resorcinol/formaldehyde molar ratio of 1.8/2.2 and solidified at 210 °C is characterized by the best sorption-selective characteristics and chemical stability. Under dynamic conditions, at feeding >1000 bed volumes of a model solution with pH > 13, the RFR 3-1 goes through six sorption cycles without noticeable changes in the sorption characteristics. The results are presented that demonstrate the possibility of RFR application in the decontamination of real LRW from Cs-137.
