Physicochemical Properties of Plasma Activated Liquid Generated by an Atmospheric Pressure Vertical Falling Liquid Ground Electrode
Plasma activated liquid(PAL)produced by atmospheric pressure gas-liquid discharge is a solution containing a variety of reactive oxygen and nitrogen species(RONS).Here,vertical falling water is used as the ground electrode to re-place the inner center electrode in a conventional wire barrel discharge device.The effects of different applied voltage and initial solution conductivity on the physicochemical properties,inactivation efficacy and energy efficiency of PAL are in-vestigated.The results show that the pH value of PAL decreases and the conductivity of PAL increases with the increase of applied voltage and initial solution conductivity.When the initial solution conductivity is 0.05～200 mS/cm,the con-centrations of NO3-,H2O2 and O3 in the PAL increase with increasing the applied voltage and the initial solution conductivity.The NO2-concentration first increases and then decreases with increasing the applied voltage when the ini-tial solution conductivity is 2.0～200 mS/cm.The NO2-concentration increases with the increase of applied voltage at the initial solution conductivity of lower than 2 mS/cm.PAL shows inactivation efficacy on bacteria with the increase of ac-tivation time.This study provides a new idea for selecting suitable electrodes for different environmental applications of gas-liquid discharge technology.
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维普
