Degradation of chelating and complexing agents in an irradiated, simulated mixed waste
A simulant of an actual mixed waste was prepared and used to study organic degradation in nuclear wastes. Citric acid, ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA) and N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA) were added to an inorganic matrix, which contained no radionuclides. This simulated waste was then γ-irradiated in a60Co-source up to 100 hours. The organics degraded "exponentially" at first, before tapering off; 80% had disappeared by 100 hours. Numerous degradation products (27 in all), mainly complexor and chelator fragments, ranging from small to complex species, were identified by gas chromatography/mass spectrometry. The waste's total organic content decreased with increasing radiation, indicating that radiolytic degradation is dispersive. © 1992 Akadémiai Kiadó.
Toste, A. "Degradation of chelating and complexing agents in an irradiated, simulated mixed waste." Journal of radioanalytical and nuclear chemistry 161, no. 2 (1992): 549-559.
Journal of Radioanalytical and Nuclear Chemistry Articles