Study on Soil Atrazine Pollution Treatment Simulation Based on Pulsating Fluidized Bed DBD Reactor

This study simulates a pulsed fluidized bed medium-blocked discharge reactor for the remediation of contaminated soil, establishing a two-scale model that couples plasma reaction kinetics with gas–solid flow behavior. By adjusting the pulsation frequency from 0 to 5 Hz, the degradation dynamics of atrazine during plasma treatment were analyzed. The results indicate that moderate frequencies (2.0–3.5 Hz) enhance fluidization and gas–solid mixing, facilitating a more uniform distribution of ozone and hydroxyl radicals and thus improving the degradation efficiency. Within this frequency range, the bed expansion increases, the solid volume fraction decreases, and the active species are more effectively distributed, with the atrazine degradation rate reaching 91.4%.