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- Title
Degradation of the Chromophore Functions of Dyes in Irradiated Solutions.
- Authors
Kholodkova, E. M.; Ponomarev, A. V.
- Abstract
Radiolysis damages the system of conjugated bonds and thus leads to the degradation of the chromophore functions of dyes in aqueous solutions. Ten representatives of quinophthalone, indigo, triphenylmethane, and azo dyes exhibited the same type of correlations between the absorbed dose and the degree of discoloration. It was shown using the method of competing scavengers that the color of aerated solutions decreased mainly due to the addition of OH radicals to the dyes. The radiation-chemical yields of discoloration ranged from 0.03 to 0.11 μmol/J and increased depending on the length of bond conjugation in the dye molecules. For practical electron-beam discoloration of dye solutions with a concentration of 20 mg/dm3, an absorbed dose of 1–1.5 kGy was sufficient.
- Subjects
ABSORBED dose; CONJUGATED systems; CHEMICAL bond lengths; AQUEOUS solutions; RADIOLYSIS; COLOR removal in water purification; AZO dyes
- Publication
High Energy Chemistry, 2023, Vol 57, Issue 2, p146
- ISSN
0018-1439
- Publication type
Article
- DOI
10.1134/S0018143923020078