REACTION OF H ATOMS WITH CHELATORS IN HIGHLY BASIC SOLUTION: H_2 PRODUCTION IN HIGH LEVEL LIQUID WASTE SIMULANTS

摘要

The rate constants for hydrogen abstraction by H from ethylene-diamine tetracetic acid (EDTA), N-(2-hydroxyethyl)-ethylenediaminetriacetic acid (HEDTA), nitrilotriacetic acid (NTA), iminodiacetic acid (IDA), glycolic acid and citric acid were measured at pH 13. The predominant product of these reactions is H_2. The rate constants obtained are more than an order of magnitude larger than the literature rates that had been measured at pH 1. These measurements are of significance for understanding the radiolytic production of H_2 in nuclear waste storage tanks.