Investigation of the influence of oxygen on the radiolysis of the sulfonic acid cation-exchanger KU-2-8. [Gamma radiation]

Journal Article · Fri Jul 20 04:00:00 EDT 1979 · J. Appl. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:5802759

Semushin, A M; Shistyakov, D A; Kuzin, I A

Ion-exchange materials come into contact with flows of aqueous solutions containing various amounts of dissolved oxygen in the water-purification systems of atomic electric power plants, as well as in radiochemical production lines. Swollen specimens of the KU-2-8 cation-exchanger in the H/sup +/ form with a grain diameter of 0.4-0.6 mm were subjected to the effects of radiation on an MRKh-..gamma..-20 apparatus at a dose rate of 0.7 Mrd/h and a temperature of 50/sup 0/C. The dose rate was determined by ferrous sulfate dosimetry. The products formed during the radiation chemical oxidation of the sulfonic acid cation-exchanger were analyzed for their relative concentrations of polysulfonic acids (PSA), sulfate ions, and organic compounds containing phenolic and carbonyl groups, as well as compounds having oxidation-reduction properties. The gaseous radiolysis products of the ion-exchanger were analyzed on a Tsvet-4-67 chromatograph. More intense degradation of the KU-2-8 cation-exchanger takes place in the presence of oxygen than in the case of samples irradiated with access to oxygen. The interaction of oxygen dissolved in water with radicals formed as a result of the irradiation of the sulfonic acid cation-exchanger mainly causes the cleavage of the backbones of the sulfonated polystyrene and the cross-links, as well as the oxidation of the reson madix. This is accompanied by the loss of the exchange capacity with respect to the sulfonic acid groups. The formation of inactive sulfur in the resin phase was not detected. A significantly larger amount of acidic degradation products passes into aqueous extracts following the irradiation of the ion-exchanger in an oxygen medium. Therefore, the influence of oxygen dissolved in water in the radiolysis of the KU-2-8 cation-exchanger should be taken into account in calculations and in the use of ion-exchange filters operating even in weak fields of ionizing radiation. 2 figures, 1 table.

• OSTI ID: 5802759
• Journal Information: J. Appl. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Appl. Chem. USSR (Engl. Transl.); (United States) Vol. 52:2; ISSN JAPUA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CATIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHROMATOGRAPHY
CRYOGENIC FLUIDS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
GAMMA RADIATION
HYDROGEN COMPOUNDS
ION EXCHANGE
ION EXCHANGE MATERIALS
IONIZING RADIATIONS
IONS
NONMETALS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
ORGANIC SULFUR COMPOUNDS
OXYGEN
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
RESINS
SEPARATION PROCESSES
SULFONIC ACIDS
WATER