Fate of 1,1-Dimethylhydrazine and Methylhydrazine in the Aquatic Environment
1979
Sikka, Harish C. | Banerjee, Sujit | Appleton, Henry T.
The kinetics of oxidation of methyl-hydrazine (MMH) by dissolved oxygen in water has been studied as a function of cupric-ion concentration and pH. The results indicate that the material is not expected to persist in non- acidic waters beyond a period of one or two days. A major oxidation product from both MMH and UDMH is formaldehyde. The oxidation of UDMH in UDMH/water mixtures has been studied as a function of the water content of the solution. The formation of dimethylnitrosamine is low at very high UDMH concentrations (80- 100% UDMH by volume), optimum in the 50-80% range and lower in more dilute solutions. Extrapolation of these results to environmental conditions reveal that nitrosamine formation is not expected to be significant. The action of naturally occurring microbial communities on aqueous UDMH solutions has also been investigated. Spectrophotometric analysis indicates that little or no difference in rate or product exists between the test solutions and their sterile controls.
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