Generation of Ammonium Ions Products From Reaction Between Dimethylhydroxylamine and Metal Ions

Abstract

The ammonium ions produced by the reactions of relatively excessive dimethylhydroxylamine(DMHAN) with Fe3+, Ce4+ and Pu4+ in dilute nitric acid solutions at room temperature were determined by ion chromatographic method. The results show that the reactions between DMHAN and Fe3+, Ce4+ and Pu4+ all produce a certain amount of ammonium ramifications under acidic conditions, which includes (CH3)2NH+2, NH+4 and CH3NH+3. The reaction mechanism is as follows. When DMHAN reacts with Fe3+, Ce4+ and Pu4+ respectively, it can be oxidized and reduced simultaneously in the acidic solution for the -1 valence of N atom in DMHAN. Then part of DMHAN is reduced to (CH3)2NH+2, and it is further converted into NH+4 and CH3NH+3 partly. With the increase of redox potential of Fe3+, Pu4+ and Ce4+, the conversion ratio of DMHAN into amine ions increases and the proportion of (CH3)2NH+2 in total amine ions decreases, while the proportion of NH+4 in total amine ions increases.

Keywords

• dmhan
• pu4+
• ammonium ions
• fe3+
• ce4+