Is it true that activated charcoal regains activity after sun exposure?

Activated charcoal is exposed to the sun after a long time. Activated carbon needs to be used for a period of time, not to dry the formaldehyde inside, but to dry the water molecules attached to the surface of the activated carbon, and keep the small holes on the surface of the activated carbon unblocked, so that it can continuously adsorb harmful gases such as formaldehyde until the activated carbon is saturated. Whether it is activated carbon or bamboo charcoal, there are some large or small particles, the small particles are calcined or activated, and there are many honeycomb-shaped pores on the surface, and their formaldehyde absorption and odor absorption all rely on the small pores on the surface.

Therefore, the purpose of exposure is to keep the surface of the activated carbon pores unblocked, as long as the pores are unblocked, the activated carbon can continuously adsorb harmful gases until the pores inside are saturated. <>

Activated charcoal needs to be exposed to the sun after a period of use. The main reasons are:

1.Activated carbon can not only adsorb harmful gases in the air, but also adsorb moisture;

2.The use of old activated carbon moisture will also inhale more;

3.If the tidal gas is inhaled, it will naturally occupy the "space" for the adsorption of toxic gases in the carbon;

Therefore, exposure to the sun can remove the moisture in the charcoal, making room for continued adsorption of toxic gases.

In addition, during the exposure of activated carbon, the air inside the carbon will be heated and expanded, and the carbon body will be washed out and covered.

dust on the carbon pores and open new carbon pores to improve the adsorption performance of activated carbon.

There are tricks when you are exposed to the sun, and you must lay a waterproof cloth on the ground when you are exposed to the sun, so that the moisture on the ground will not re-enter the charcoal body. Even if the coconut shell activated carbon has a high quality level, if you want to extend the service life, you need to expose it to the sun for a long time before using it. <>

Activated carbon is black powdery or lumpy, granular, honeycomb-shaped amorphous carbon, and there are also crystalline carbon arranged in a regular manner. In addition to carbon elements, activated carbon also contains two types of admixtures: one is chemically bound elements, mainly oxygen and hydrogen, which are left in the carbon due to incomplete carbonization, or in the activation process, foreign non-carbon elements are chemically combined with the surface of activated carbon; Another type of admixture is ash, which is the inorganic part of activated carbon, and ash is easy to cause secondary pollution in activated carbon.

Activated carbon is widely used in production and life due to its strong adsorption.

More than 80%-90% of activated carbon is composed of carbon elements, which is why activated carbon is a hydrophobic adsorbent. In addition to carbon elements, there are also two types of admixtures: one is chemically bound elements, mainly oxygen and hydrogen, which are left in the carbon due to incomplete carbonization, or in the activation process, foreign non-carbon elements are chemically combined with the surface of activated carbon, such as when activated with water vapor, the surface of activated carbon is oxidized or oxidized by water vapor; Another type of admixture is ash, which is the inorganic part of activated carbon.

It is true that activated carbon can be regenerated. But it is doubtful that it can regenerate under the sun.

No one in the laboratory puts activated carbon (activated carbon is almost not used in the laboratory, but we use zeolite molecular sieves) to regenerate it in the sun, at least in the oven. So blindly believe that basking in the sun is the same as a new one, or give up, at most it has a certain effect, and after a few regenerations, it is better to replace it with a new one, and it will be adsorbed in the sun.

The principle is adsorption equilibrium.

When formaldehyde is absorbed: environmental formaldehyde content The amount of formaldehyde adsorbed by activated carbon.

When regeneration: environmental formaldehyde content The amount of formaldehyde adsorbed by activated carbon.

Adsorption develops in the direction of equilibrium, and adsorption and regeneration are completed.

Heating accelerates the equilibrium process, while molecular movement intensifies, causing gas molecules to desorb from the activated carbon. Vaucing also helps with regeneration. <>

When using activated carbon, it is best to dry it once a week and change it once a month, otherwise it is easy to cause secondary pollution due to adsorption saturation. If you want to remove formaldehyde from the house as soon as possible, it is recommended that you carry out a variety of methods at the same time, and the following is an introduction to several commonly used methods for removing formaldehyde.

1. Wise Stone.

It is a purification product favored by decoration families in recent years, compared with other formaldehyde removal products, its own pores are more, with the dual function of absorption and decomposition, and the speed of formaldehyde removal is also fast. Its unique decomposition function can save the time of drying, and it is more convenient to use, which can effectively control the formaldehyde problem for a long time. When choosing, it is important to note that it is a gray ore with an irregular shape and is not a round particle.

2. Wind fan.

If you want to eliminate formaldehyde in the house as soon as possible, you can put a floor fan at home after the decoration is completed, and open the window for ventilation at the same time, if the outdoor wind allows, the fan can increase the flow speed of indoor and outdoor air, reduce the indoor formaldehyde content, and speed up the release of formaldehyde, it may be the most effective and low-cost way

3. Photocatalysts.

Photocatalyst, as the name suggests, is a catalyst mentioned in our junior high school chemistry, which decomposes formaldehyde into carbon dioxide and water through light, reduces the formaldehyde content in the room, and achieves the purpose of removing formaldehyde.

4. Formaldehyde remover.

There are many principles of formaldehyde scavengers, there are formaldehyde decomposition, formaldehyde is closed, the former is only the free formaldehyde is decomposed, the bonded formaldehyde inside the material is still in the continuous decomposition and release, the latter is the use of protective film to isolate formaldehyde from the air, formaldehyde still exists, when the protective film is broken, formaldehyde will still gush out in large quantities!

Fifth, high temperature.

In the case of high temperature, it can promote the conversion of formaldehyde in the bound state into free formaldehyde and reduce the total content of formaldehyde, because formaldehyde penetrates deep into the board, although formaldehyde cannot be completely removed, but its effect is still very obvious.

Formaldehyde is also a master who bullies the soft and is afraid of the hard, if one method doesn't work, we will go to two, and if two don't work, we will go to the two! Formaldehyde will only be removed as soon as possible if multiple methods are carried out at the same time.

After exposure, the activated carbon evaporates the water and keeps the adsorption of the activated carbon smooth.

While adsorbing harmful gases such as formaldehyde, activated carbon will also adsorb moisture in the air, and the water will block the capillary tube if it adheres to the surface of the small holes, so that the activated carbon can not continue to adsorb. Therefore, when using, it is necessary to bask the activated carbon frequently in the sun to evaporate the water in it and keep the capillary of the activated carbon unblocked.

Generally speaking, the temperature is high in summer, and one day of exposure to the sun can restore the activity of activated carbon. In winter, the temperature is relatively low, and the ultraviolet rays are not strong enough, so it is recommended to put it in a sunny, dry, and high temperature place. Two days is enough.

--This information comes from Haoheyuan Activated Carbon****, I hope it will be helpful to you.

But it is certainly not as good as vapor desorption, and all the process of desorption and recovery is essentially the process of releasing toxic substances, so don't put it in a closed room to bask in the sun...

Activated carbon can be used after exposure, after sun exposure, the water molecules attached to the surface of the activated carbon will evaporate, keep the small holes on the surface of the activated carbon unblocked, so that the activated carbon will continue to adsorb formaldehyde and other harmful gases until the activated carbon is saturated.

Activated carbon is black powdery or lumpy, granular, honeycomb-shaped amorphous carbon, in addition to containing carbon elements, it also contains two admixtures, one is a chemically bonded element, mainly including oxygen and hydrogen, which is convenient for activated carbon to be chemically combined with foreign non-carbon elements and activated carbon surface when adsorbed.

Another admixture is ash, which is the inorganic part of activated carbon, but it is easy to cause secondary pollution of activated carbon.

Activated carbon can volatilize a small amount of substances attached to the activated carbon after exposure, but can not volatilize the adsorbed formaldehyde, so it cannot rely on the exposure of the sun to realize the recycling of activated carbon, and ensure that the activated carbon in the room is replaced in time after a period of use.

Activated carbon that usually needs to be exposed to the sun is activated carbon that has been placed for a long time or is damp, and when activated carbon is used, in addition to absorbing toxic gases in the air, it will also absorb humid moisture in the air, which will occupy the space for adsorbing toxic gases in the carbon, so the method of exposure will be used to remove the moisture in the carbon to make room for continued adsorption of toxic gases.

You can get a sun, no problem.

Yes, if you use it for a long time, it is best to take it to the sun, and the effect will be better.

Activated carbon can generally be used for 6-12 months, and under normal circumstances, it can not be used after 3-6 times in the sun, and the more times it is sun, the worse the effect will be.

Activated carbon adsorption mainly relies on force.

The adsorbed harmful substances are difficult to desorb, and the "desorption" of activated carbon needs to be completed in specific equipment through complex processes such as thermal regeneration, chemical elution, solvent extraction regeneration, and biological regeneration, and cannot be obtained by drying. However, activated carbon drying in the sun can reduce moisture and help adsorb harmful gases. As an adsorbent product such as activated carbon, it has a certain amount of saturation, and it can be used all the time when the product has not yet reached saturation.

However, activated carbon has a large adsorption capacity, and it will not be saturated after long-term use, so it does not need to be replaced frequently.

Activated carbon is the main tool we commonly use to adsorb formaldehyde and other odors, and activated carbon can be placed in the home and car to adsorb bad smells in a closed environment. However, activated carbon will also absorb saturation, so after a period of time, you need to replace it with a new activated carbon pack. It is also possible to dry activated charcoal for a period of time and then reuse it, but does it really work?

The more common household activated charcoal is used for about a year. If the activated carbon is to be reused, simply wrap the activated carbon in gauze and then expose it to sunlight for 3 to 5 hours to release the space in the activated carbon that is occupied by water molecules. It can be reused for 3-8 months.

Depending on the above method, it can be reused 3-8 times.

If you want to reuse industrial activated carbon, you need to desorb it through a professional treatment or send it back to the manufacturer for activation before it can be used again.

Useful, but weak.

The process of emptying and repurposing activated carbon saturated with pollution absorption is known in the professional sense as "desorption". Activated carbon exposure to sunlight is effective in removing water, but the desorption of contaminants is very limited. Because the temperature is higher in the sun, the molecule is more active and desorption is a little faster than absorption, but only a little faster.

In other words, if you want to completely remove the pollutants that have been absorbed for three months through sun exposure, you may need to be exposed to the sun for two months straight.

In order to remove all the contamination of activated carbon adsorption, a very complex operation is required. It can only be carried out by using special high-temperature and high-pressure reaction columns, which is very cumbersome for ordinary users. It is better to buy new activated charcoal directly to save money and effort.

1.The height of the activated carbon: In addition to the cabinet, the height of the space should be within 180 cm, regardless of the height of the space. This is because formaldehyde is heavier than air and is mainly concentrated in the middle and lower part of space, exactly the same height as the human body.

2.Activated charcoal has the effect of removing formaldehyde, but the action is slightly slower. In addition, it must be replaced periodically as described above. For a new home that is urgently needed, it is recommended to use it in combination with other treatment methods, such as finding a professional formaldehyde treatment company at the same time.

3.Usually, after renovating a new house, open the windows and ventilate it for at least two to three months. You can also use a fan to speed up the exchange of fresh air and indoor air and vent harmful gases outside.

When checking in, a large amount of activated carbon can be placed in place according to the above method to help absorb some harmful gases such as formaldehyde.