If the source of formaldehyde cannot be eliminated at the source, can we only let the formaldehyde act recklessly? of course not!

Removal of formaldehyde in home decoration is a long-term task. When you search for methods to remove formaldehyde in decoration on the Internet, you will get a variety of tips, but is it really useful? Let's evaluate them one by one.

1. Bamboo charcoal, activated carbon, diatom mud adsorb formaldehyde

Practicality: ★✩✩✩✩

Can it be adsorbed? Yes, but there are two conditions. One requires air flow to allow formaldehyde to contact these adsorption carriers; the second is that the contact area should be large. However, the problem of adsorption is that it will be released after saturation. That is to say, when these materials absorb enough formaldehyde, if the temperature rises, the originally absorbed formaldehyde will be released, causing secondary pollution.

2. Green plants absorb formaldehyde

Practicality: ★✩✩✩✩

There are some green plants that can absorb formaldehyde, such as spider plant. Studies have shown that if a room of 100 square meters and a floor height of 3 meters, the concentration of formaldehyde is 0.5 mg/m3, a spider plant needs to work for 1 year to absorb free Formaldehyde, this is not counting the amount of continuous release from the sheet. In other words, keeping dozens or hundreds of spider plants in your home might be a little useful in theory.

3. Photocatalyst decomposes formaldehyde

Practicality: ★✩✩✩✩

If the adsorption fails, then decomposition of formaldehyde is always okay? Photocatalyst can decompose formaldehyde into water and carbon dioxide. Not to mention that this thing may have secondary pollution, and it may not be possible to buy the real product. In addition, photocatalysts need to have a necessary environmental condition to remove formaldehyde: ultraviolet light.

① The number of ultraviolet rays required by the photocatalyst is not satisfied by the ultraviolet rays in the sun, and the room needs to be filled with ultraviolet array lamps to meet.

② The formaldehyde that can be processed by the photocatalyst is only the formaldehyde around it, and it cannot be processed beyond a few centimeters.

③ The photocatalyst particles are the -10th power of PM2.5, which is a new air pollutant for the home environment

④ At present, most of the domestic photocatalyst products cannot remove formaldehyde for a long time and can only be maintained for one or two months. The main purpose of Japanese photocatalysts is to use the exterior walls of buildings, and they are not used to remove formaldehyde in homes.

4. Products that remove formaldehyde

Practicality: ★★✩✩✩

There are also special formaldehyde removal products on the market. For example, formaldehyde scavengers "remove" formaldehyde by means of chemical reactions. The essence of this method is to oxidize formaldehyde into formic acid, but it is easy to decompose by itself. Not to mention the damage to the wood, and it will lose its effectiveness within a few hours, and it is impossible to achieve "one spray forever". Moreover, high-concentration hydrogen peroxide sprayed in the air will cause new pollution hazards to people. Other oxidizing agents and reducing agents can not effectively remove formaldehyde, and will introduce similar new pollution.

5. Open windows for ventilation

Practicality: ★★★★★

In fact, the most useful method is dilution. When the concentration of formaldehyde is low, it is safe. The most common method of dilution is ventilation.

Formaldehyde has two major characteristics, one is that it releases faster at high temperatures, and the other is that it is easily soluble in water. Under the conditions of high temperature, high humidity and negative pressure, the speed of formaldehyde decomposition and emission will increase. High temperature, such as summer or indoor air conditioning and heating; high humidity, humidifier; negative pressure, in addition to opening windows for ventilation, you can spend about 300 yuan to buy an exhaust fan to exhaust air outside.

Someone has done a test in his new home, turning on the heating air conditioner, turning on the humidifier, and using an exhaust fan with an air volume of 520m³/h to exhaust. After 24 hours, the concentration of formaldehyde is reduced by half without rebounding after ten days. In fact, summer is a good season to remove formaldehyde.

5. Fresh air system

Practicality: ★★★★✩

The favorite way of local tyrants. Opening windows for ventilation is very suitable in summer, but in winter, it seems a bit unsuitable. If the decoration budget is not tight, it is better to spend 20,000 to 30,000 to install a fresh air system, which can not only bring outdoor fresh air into the room, but also through PM2.5 filtration and heat exchange to ensure that the indoor temperature is not lost.

6. Air purifier (including activated carbon filter)

Practicality: ★★★★✩

Air purifiers were not originally aimed at formaldehyde, but formaldehyde pollution has been fired up in recent years. The activated carbon filter in the air purifier can physically adsorb formaldehyde. Although the adsorption is less, it is still somewhat effective. However, it should be noted that in order to prevent secondary pollution, the activated carbon filter should be replaced regularly, generally every 7-8 months.

    There are so many methods mentioned above, but I personally think that the most effective way to decorate and remove formaldehyde is ventilation. If there is no condition to install a fresh air system, maybe you can try indoor heating, humidification, and exhaust methods. The budget is small. effective.