Plant adsorption method
The results showed that the best formaldehyde absorption effect was found in mallow, and the worst in Clivia. The plants with strong resistance to formaldehyde, such as Mallory, Cymbidium and Chlorophytum, can be used to absorb formaldehyde. Although the plant adsorption method can remove a certain amount of formaldehyde, but the adsorption is slow, the amount of formaldehyde released by decoration materials is far greater than that of plant adsorption, and the effect of plant adsorption method in purifying indoor formaldehyde is not significant.
Activated carbon adsorption method
The principle of purifying formaldehyde in indoor air by activated carbon depends on its developed specific surface area and pore structure, and passively adsorbs formaldehyde and other pollutants into the space of activated carbon through air circulation. Therefore, the more developed the pore structure and the larger the specific surface area, the stronger the adsorption capacity of activated carbon. Although the physical adsorption method can remove formaldehyde, it depends on the air flow. When the indoor air is not flowing, it can only adsorb the formaldehyde in the contact air, and the overall adsorption effect of indoor formaldehyde is not significant. When the adsorption is saturated, the degradation effect of formaldehyde will be greatly reduced, and it can not continuously and effectively adsorb indoor formaldehyde.