701 / 2022-03-31 16:21:56

The Remediation of Lindane Contaminated Soil by Fluidization-like Dielectric Barrier Discharge Driven by Pulsed Power Supply

pulsed high-voltage discharge,soil,dielectric barrier discharge

Lindane has been widely used as pesticides from 1950’s to 1980’s because of high efficiency, although it was banned for decades, huge amount of soil polluted by lindane is untreated or isolated placed, which is risk for environment and public human. Due to the dielectric barrier discharge (DBD) has promising results for the soil remediation, the fluidization-like DBD was applied for lindane contaminated actual soil in atmosphere by bipolar pulse power supply. The effect of flow rate and soil diameter on lindane was discussed, and soil particle distribution was simulated via Euler-Euler model by COMSOL Multiphysics software. Larger flow rate or diameter enhanced the lindane degradation, which indicated gas flow rate was beneficial for soil fluidization and small diameter shorten residence time from simulation. Approximately 60% lindane was degraded in short time, and the promotion degradation achieved compared with non-fluidization (0.5 L/min).