Degradation of o-CP by pulsed high voltage discharge in water

作者：Bian Wenjuan; Zhou Minghua; Lei Lecheng^*

来源：Journal of Chemical Industry and Engineering (China), 2005, 56(1): 152-156.

• Corona discharge
• Diagrammatic sketch
• Discharge in water
• Electrode distance
• O chlorophenol
• Peak voltage
• Pulsed high voltage
• Spark discharge
• Stream discharge

The characteristic of the o-chlorophenol degradation by pulsed high voltage discharge was investigated in present work. The concentration of o-chlorophenol declined faster by a shortening distance, increasing peak voltage or frequency. A degradation efficiency of 98.7% for o-CP is achieved after degradation for 30 min under the conditions of 2 cm of the electrode distance, 30 kV of the peak voltage and 150 Hz of the frequency. It was found that the discharge form was determined not only by the peak voltage and the electrode distance, but also by the salt content in the solution. The increase in salinity could cause a transition from spark discharge to stream discharge and then to corona discharge. The concentration of o-chlorophenol declined faster in the spark and stream discharge than in the corona discharge. The degradation of o-chlorophenol is attacked by hydroxyl radical to form 2-chloro-hydroguinone. The later is oxidized to 2-chloro-benzoquinone. Therefore, the ring is opened to form simple organic acids such as metacetonic acid, oxalic acid, acetic acid and formic acid.

• 出版日期2005
• 单位浙江大学