Abstract
The degradation of hydrazine (N2H4) with concentrations of 0.1 and 1.0mmol/L was investigated as a function of pH under the stirring (300rpm) and ultrasonic irradiation (200kHz, 200W) conditions. It was found that the hydrazine degradation depended greatly upon pH under the ultrasonic irradiation condition, while it did not take place over the whole pH range (0.8–9) under the stirring condition. The hydrazine degradation was suppressed by the addition of tertial butyl alcohol (t-BuOH) known as a scavenger of OH radicals. This result suggested that OH radicals played an important role in the hydrazine degradation. The pH dependence of the hydrazine degradation was discussed in terms of a dissociating form of hydrazine depending upon pH and the effect of OH radicals.
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