Comparison the advantage and disadvantage of PM2.5 Prevention way 

PM2.5 Prevention way 

1.Filtration method 

Including the air conditional, Humidifier, air freshener, etc., the advantage is obviously reduce PM2.5 concentration; disadvantage :filter membranes need to clean and replace . 

2.Water adsorption 

For ultrasonic atomizer, indoor water curtain, pool, fish tank, etc., It can absorb the hydrophilia PM2.5 in the air , disadvantage is increasing the humidity , can’t effectively wipe off hydrophobicity PM2.5.

3.Plant absorption 

Plant leaves has large surface area, can absorb the harmful gas and adsorb PM2.5. The advantage is output favorable gas, the disadvantage is low absorption rate, some plants produce  harmful gas .

4.Anion and plasma method

By electrifying particles in the air, coalesced to form larger particles and settled, but the particulates did not move actually, just adhere to the nearby surface .it easily cause dust again. High Voltage ion technology during work produce byproducts such as ozone.

Photocatalyst is generic terms of Photosemiconductor material with photocatalytic function represented by nanometer titanium dioxide.  It coats in the basic material surface to produce Catalytic degradation function under the light, degrades poisonous and harmful gases in the air. Good Photocatalytic air purification plant with ultraviolet source, the purification efficiency is 3% (According to the device inlet and outlet pollutant concentration difference calculation), the best also doesn’t reach 5% . So the purification efficiency is very low, and relative researches show that it will produce the Highly toxic intermediates in the photocatalytic process.

Compared with the advantage and disadvantage of removing PM2.5, It is safer to use a conservative filter.