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Characteristics of Floating Micro-particle Collection Efficiency According to Gas Flow Conditions in the Channel
Summary
This study tested electrostatic precipitators as a method for capturing airborne microplastic particles, achieving up to 94.3% collection efficiency by optimizing electrode spacing and injection pressure. The findings provide baseline engineering data for developing practical air filtration systems to remove microplastics from indoor or workplace air, which is important given growing evidence that humans regularly inhale plastic particles.
Recently, large amounts of microplastics have been detected not only in the ocean but also in the atmosphere. Studies have reported the environmental pollution and harmful effects on human health caused by microplastics floating in the atmosphere. However, previous research on particle collection using electrostatic precipitators has mainly focused on fine and ultrafine dust. Therefore, in this study, the collection efficiency of 100-mesh microplastic particles was measured at different electrode distances and injection pressures using an electrostatic precipitator. At an injection pressure of 4 bar, the collection characteristics at different electrode distances were higher in the order of 25, 45, and 35 ㎜ due to the influence of turbulence, and the maximum efficiency was 91.8%. At an electrode spacing of 25㎜, the collection efficiency increased as the injection pressure increased because turbulence generation was reduced. The maximum collection efficiency was measured at 94.3% at an injection pressure of 6 bar. The results of this study could be used as basic data for research on capturing and removing floating microplastics in the air through electrostatic precipitation.