Indoor particulate matter removal using droplet-particle interaction with electric charge effect

Particulate matter (PM) is micro- and nano-sized particles suspended in the air with us. PM has been studied on many adverse effects on human health and environment. Since most people spend 90 % of their time indoors. This is the reason indoor PM removal is important for our healthy life. Various methods for PM removal have been introduced such as filtration, electrostatic precipitation (ESP), and wet scrubbing. However, ESP and wet scrubbing have a limitation to conduct for applying indoor condition because they are focused on specific or harsh environments. In this study, PM removal effects with electric charged droplets generated by electrospraying were experimentally conducted in indoor experimental condition. The electric charge of particles and droplets was measured by Faraday cup to obtain electrostatic effect between particles and droplets. Based on electric charge of particles and droplets, we can successfully predict the deposition constant analytically, and compare the experimental result.