Removal of Mono- and Polydisperse Particles with Size of 30-300 nm by Using a Negative Air Ionizer

摘要

Generally, polydisperse submicron particles (PSPs) contributed most of the aerosol particle number indoors and are usually used for removal testing. However, the behaviors of monodisperse submicron particles (MSPs) are easier to analyze. Previous studies have indicated that the degree of hazard about fine and ultrafine particles was associated with a particle size (surface area) and number concentration. This study aims to investigate the difference between the removal efficiency of MSP and PSP by using the negative air ionizer (NAI) under different freestream air velocity (FAV). The particle sizes of 30-300 nm were targeted because most of pathogenic viruses, commonly used nano materials, and the most penetrating particle size of filters fall within these size ranges. The result of this study can help establish a better understanding of the deposition of 30-300 nm particles enhanced by the NAI.