Figure 1
From: High-performance inertial impaction filters for particulate matter removal
(a) Photographs of a random location in China during (I) a moderate day and (II) an extremely PM2.5-related hazardous day, respectively. (b) Conceptual sketches of two types of existing commercial air filters in common use: (I) a fibrous air filter with static electricity and (II) a membrane air filter with tiny pores. (c) Conceptual illustrations of the basic building block of an inertial impaction filter. Inset is the cross-sectional structure of an inertial impaction filter unit.
