Detailed study of HEDTA's chemodynamics upon gamma-radiolysis in a simulated, mixed waste

Abstract

Gamma-radiolysis of the parent compound N-(2-hydroxyethyl)ethylenediamine-triacetic acid (HEDTA) in a simulant of a Hanford mixed waste, at γ-doses of 0-7.5·106±10% R, yielded extensive degradation. Two major degradation products, glyoxylate and N-(nitroso)iminodiacetic acid (NIDA), were identified, along with lower levels of malonate and oxalate. Comparison of HEDTA's radiolysis with that of ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA) and citrate, from earlier studies, reveals several fundamental similarities, along with marked differences. Comparatively speaking, HEDTA's radiolysis is not particularly diverse, but it is very dispersive.

Department(s)

Chemistry and Biochemistry

Document Type

Article

DOI

https://doi.org/10.1007/s10967-008-0701-z

Publication Date

2008

Journal Title

Journal of Radioanalytical and Nuclear Chemistry

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