THE $sup 60$Co $gamma$-RAY RADIOLYSIS OF ACRILINE ORANGE NO IN AQUEOUS SOLUTIONS

Journal Article · Sat Dec 01 04:00:00 EST 1962 · Z. Physik. Chem. (Frankfurt)

DOI:https://doi.org/10.1524/zpch.1962.35.4_6.234· OSTI ID:4743412

Rakintzis, N Th; Marketos, D G; Konstas, A P

Aqueous solutions of Acridine orange (AO) were irradiated with Co/sup 60/ gamma rays in the presence and in the absence of oxygen. In the first case only irreversible decoloration of the dye was observed, due to the oxidative action of two OH radicals per molecule of the dye. Upon irradiation of air-free solutions a recovery was observed on admission of air to the extent of 55%. The reversible decoloration in this case is attributed to reduction caused by two H atoms per molecule of the dye. The decoloration yield in the presence of air was found to be independent of the concentration of the dye, the pH of the solution, and the gamma dose-rate, within a wide range, and equal to 1.25 plus or minus 0.05. The behavior of the system agalnst the radiation in the presence of some selected scavengers (dextrose, ferric nitrate, 2,5-dichlorohydroquinone, and formic acid) in aerated as well as in deaerated solutions was further investigated. The ultraviolet and visible spectra of irradiated and non- irradiated samples were finally studied. The results were interpreted on the basis of reactions with the free radicals produced from water. (auth)

• Research Organization: Nuclear Research Center Democritus, Aghia Paraskevi-Attikis, Athens
• Sponsoring Organization: USDOE
• NSA Number: NSA-17-018154
• OSTI ID: 4743412
• Journal Information: Z. Physik. Chem. (Frankfurt), Journal Name: Z. Physik. Chem. (Frankfurt) Vol. Vol: 35
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ACRIDINE ORANGE
AIR
CHEMISTRY
COBALT 60
COLOR
DECOMPOSITION
DIES
DYES
FREE RADICALS
GAMMA RADIATION
IRRADIATION
LIGHT
OXYGEN
RADIATION CHEMISTRY
RADIATION DOSES
RADIOLYSIS
SPECTRA
ULTRAVIOLET RADIATION