Inhalable particulate matter is one of the main pollutants in China and it’s harmful to both human
health and atmosphere. Particle with an aerodynamic diameter less than or equal to 2.5μm is called PM2.5
or fine particle. It’s the main cause of haze weather in China nowadays and causes a great concern [1].
What’s more, PM2.5 has very big specific surface area and it can absorb large amount of heavy metal,
PAHs and some other toxic substances. And because of its tiny size it can get into human alveolus, which
definitely hurts human body more than larger particle [2]. However, the removal efficiency for PM2.5 of