We all know that we can't move in immediately after the decoration of the new house, because the content of formaldehyde in the room is relatively high at this time. We must know about the harm of formaldehyde, which is very harmful to human body. For some friends who want to move into a new house as soon as possible, it is urgent to remove indoor formaldehyde, so many families will use activated carbon. Can activated carbon really remove indoor formaldehyde? How to use activated carbon? Today, let's talk about whether activated carbon is useful for removing formaldehyde.
Can activated carbon really remove formaldehyde?
Activated carbon is an amorphous carbon in the form of powder, granule, block and honeycomb. Even activated carbon has regularly arranged crystals. Because of its stable characteristics, it has heat resistance, alkali resistance, acid resistance and water resistance. It is widely used in modern chemical industry, environmental protection and other fields.
Although the general activated carbon has a good absorption capacity, if it only depends on absorption to remove formaldehyde, it will reach the saturation state in a short time. At this time, the activated carbon will not only fail to remove formaldehyde, but also become a pollution source and release the absorbed formaldehyde to the outside, which has a negative effect.
Even if activated carbon can remove formaldehyde, the effect is relatively slow and the effect is not complete. When the old activated carbon used at home is used for about 3 months, it must be replaced with new carbon. The effect will be better at this time.
How to use activated carbon correctly?
Dosage of activated carbon:
Newly decorated rooms (including offices, hotels, etc.) shall be used according to the dosage of 1-2 bags per square meter (i.e. 50-100g). The daily protection of indoor environment can be appropriately reduced according to the degree of pollution.
Note: 50-100g per square meter is used to calculate the total space use, and does not mean that 50-100g is placed evenly per square meter.
Usage of activated carbon:
1. First of all, we take out the activated carbon after purchasing it and place it in the bedroom, cabinet, study, living room, bathroom, storage room and other places that need purification.
2. Generally speaking, the treatment area of a box of activated carbon is about 120 square meters. Depending on the pollution, it is recommended to increase the use when the pollution is serious. Keep the window open and ventilated when using, and the effect is better.
3. Activated carbon generally has no toxicity and side effects. It is recommended to place a bag of 1-1.5 square meters in the newly decorated room.
4. The unopened shelf life of activated carbon is 5 years, and the validity period after unsealing is 3 years. Pay attention to the service life.
5. After 30 days of use, activated carbon can decompose harmful substances after exposure to the sun for 3-5 hours, and its recycling effect is still significant.
Will the activated carbon leak out from the activated carbon after adsorbing toxic and harmful gases?
The process in which the molecules of the adsorbed toxic and harmful gases are released from the micropores of activated carbon is called "desorption" of activated carbon or "regeneration" of activated carbon. The "desorption" of activated carbon needs to be completed in specific equipment through complex process methods such as thermal regeneration, chemical elution, solvent extraction regeneration and biological regeneration. Therefore, in the natural environment, the toxic and harmful gas molecules adsorbed in the micropores of activated carbon can not leak out by themselves.
