DOI: 10.1002/ppap.70238 ISSN: 1612-8850
In Situ Generation of Plasma‐Activated Water Mist by Dual‐Dielectric Plasma Electrospray for Surface Microbial Inactivation
Song Zhiyan, Song Peng, Chen Lei, Zhang Wenjun, He Chenle, Wang Huaikang, Ji XiangtongABSTRACT
This study proposes a dual‐dielectric plasma electrospray system for in situ generation of plasma‐activated water (PAW) mist for surface microbial inactivation. Bacteria‐ and fungi‐dominated microbial communities collected from contaminated surfaces were treated, and inactivation was evaluated by adenosine triphosphate (ATP) bioluminescence. Under optimized conditions of 13.7 kV and 11 kHz, the ATP signal decreased after 15 s and reached its minimum at 5 min, giving a maximum ATP‐based relative inactivation efficiency of 97.73%. Compared with 75% ethanol and hot‐water treatment, PAW mist showed stronger reduction of surface biological activity, especially for fungi‐dominated samples.