3. Applicable Pollutants: Submicron Particulate Matter (PM) greater than or equal to 0.3 micrometer (μm) in aerodynamic diameter, and PM greater than or equal to 0.12 μm in aerodynamic diameter that is chemically, biologically, or radioactively toxic; hazardous air pollutants (HAPs) that are in particulate form, such as most metals (mercury is the notable exception, as a significant portion of ...

Due to the increasing use of polypropylene-based nonwoven dust masks and air filters, environmental problems that occur due plastic pollution resulting from disposal these materials have also increased. Hence, an eco-friendly filter based on PVA nanofibers (NFs) was fabricated by electrospinning a fabric, its performance evaluated as capable blocking or capturing particulate matter. The quality...

This study aimed to focus on the design and development of low-cost do-it-yourself (DIY) air purifiers, using a ventilating fan, pump, water an ultrasonic generator that can be used during haze pollution. Six types household purifiers were fabricated. The amount particulate matter (PM) carbon dioxide (CO2) levels recorded at 0, 10, 20, 30, 60 min (min), then, repeated 3 times. After 10 3rd expe...

The use of personal protective equipment during the Covid-19 pandemic may inhibit social interaction and learning process children. A child respirator that is suitable for children's growth development has been developed. Its designing was done by computer-aided design validated computational fluid dynamics simulation. device consists inhale exhale system, face cover, headband. Various air filt...