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Published in J Environ Qual 18:483-487 (1989)
© 1989 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Decompostion of Hydrazine in Aqueous Solutions

Ana M. Moliner and J. J. Street*

Dep. of Soil Science, Univ. of Florida, Gainesville FL 32611.

* Corresponding author.

ABSTRACT

The effects of several environmental factors on the fate of hydrazinc in aqueous systems were studied. In aqueous systems, the primary mechanism of hydrazine (N2H4) degradation appears to be a four-electron oxidation to N2 gas by oxygen. The oxidation rate was very slow in distilled water but increased with the addition of catalysts such as Cu(II) and phosphate ions. Conditions that accelerated the formation of the hydrazyl radical, the first step in hydrazine oxidation, increased the proportion of one-electron oxidation. This resulted in increasing the formation of ammonia as one of the degradation products. Ammonia evolution was correlated with Cu(II) and phosphate ion concentrations, as well as with temperature. Hydrazine oxidation was primarily dependent on the rate of the oxygen diffusion from the gas phase.

NOTES

Partial financial support was provided by Contract no. FO8635-83-C-0136 from the U.S. Air Force. Florida Agric. Exp. Stn. Journal Series no. 9887.

Received for publication December 19, 1988.


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