Gamma radiolysis of anion exchange resins based on 4-vinylpyridine in aqueous solution
Radiation-induced degradation of the weakly and strongly 4-vinylpyridine basic ion exchange resins by gamma radiolysis was investigated in the presence of air and liquid water. This study is focused on evaluating the radiolytic gases (H2, CO, CO2 and CH4) and liquid products (water-solute TOC and NH4 +). The weakly basic resin yielded lower amounts of H2 and CO and higher amounts of CO2 than those of the strongly basic resin. Moreover, the strong basic resin tended to yield greater amounts of NH4 +. Resins were characterized by the FTIR spectroscopy technique and the results showed that the resins structures are relatively stable.
KeywordsIon exchange resins Gamma radiolysis 4-Vinylpyridine Gas analysis Degradation
Financial support from the National Natural Science Foundation of China (Grand Nos. 11675103, 11305102 and 91226111) is gratefully acknowledged.
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