1. Plant removal method (only useful for slight pollution)
Use chlorophytum. Flowers such as aloe vera and pig excrement beans absorb indoor pollution gas, but plants absorb carbon dioxide during the day and release oxygen at night, which is harmful to human body, especially those who are allergic to pollen and flowers. The role of plants in removing harmful gases is very limited, and at best they can only be used as an auxiliary means of indoor environmental management. More specifically, only when the indoor air is slightly polluted can plants play a small role in removing odor. When indoor air pollution is serious, plants will be powerless, and even plants themselves will be smoked to death by harmful gases; More importantly, even if plants are absorbing harmful gases, people should not leave the task of controlling harmful gases entirely to plants.
2. Bamboo charcoal adsorption (not recommended)
Bamboo charcoal is made from old bamboo by high temperature firing. Due to the loose texture and low hardness of bamboo charcoal, under the action of external force, micropores are easily blocked and deformed, and it is difficult to keep the original state. Regular activated carbon manufacturers will not use bamboo to produce activated carbon. In addition, the pore size of bamboo charcoal is larger than that of shell charcoal and coal, which is not conducive to the adsorption of gas molecules. Even if adsorbed, it is easy to desorb. Treatment technology: Many bamboo charcoal sold in the market is only fired at high temperature and has no activation. It can only be called charcoal, not activated carbon at all, not air purification activated carbon. Please pay attention to consumers, don't be credulous because of the misleading propaganda and low price of bamboo charcoal, and beware of being deceived. Packing tightness: Air-purifying activated carbon must be absolutely in a sealed package during transportation and sales, because it will start to adsorb when it comes into contact with air, and its saturation period is certain. Therefore, professional air purification activated carbon must be sealed, and the packaging of bamboo charcoal products, in order to reduce costs, simply does not care about the adsorption of the products themselves, generally using adhesive tape or simple binding, there is no sealing effect at all.
3. Formaldehyde scavenger (chemical removal is easy to produce secondary pollution)
At present, a wide variety of formaldehyde scavengers are dazzling. Some remove formaldehyde by physical action, others by chemical action. However, indoor decoration and indoor air monitoring experts pointed out that formaldehyde scavenger can only temporarily close the pollution source in a short time to prevent formaldehyde volatilization, but it can not completely eliminate formaldehyde pollution. Because formaldehyde pollution is persistent, usually lasting for 10 ~ 15 years, it is basically impossible to eradicate the product at one time or completely unless formaldehyde itself has volatilized. Some spray formaldehyde scavengers are very convenient to use. Although they temporarily eliminated the odor in the air, they only formed a protective film on the outer layer of the pollution source, and the source of formaldehyde volatilization was not solved. After this protective film fails, it will still release a lot of formaldehyde to pollute the indoor air. Some formaldehyde scavengers claim that they can react chemically with formaldehyde, but if the formaldehyde scavengers react incompletely with formaldehyde, other toxic substances may be generated, resulting in secondary pollution.
4. Air purifier (same principle as activated carbon)
The air purifier is very expensive. After several months of use, the effect will obviously drop, and finally it will not work. As long as you observe carefully, the expensive high-end air purifiers on the market now basically use activated carbon to deodorize and detoxify. Air purifiers are effective only when they are powered on, and they are ineffective without power on. Closed spaces are also polluted by formaldehyde, such as cabinets and drawers. So all air purifiers can't solve it.
5. Photocatalyst (effective but limited)
It is effective, but it has great limitations, which leads to unsatisfactory results. First of all, high-quality photocatalyst should be colorless and transparent. Photocatalysts on the market are mostly white and milky white. High-quality photocatalyst is very expensive, and the cost of using it to remove pollution will be high. Therefore, some governance companies use inferior photocatalyst instead of high-quality photocatalyst, which of course cannot achieve results. According to Dr. Li from China Photocatalytic Standards Committee, all 600 yuan/liter photocatalyst products on the market are not photocatalysts, and only large manufacturers can reduce the cost to 600 yuan. Moreover, photocatalyst is mainly used in building materials and textiles, but it is not used in foreign pollution control industries. At present, there are nano photocatalyst sterilization products sprayed on the market, which is extremely irresponsible behavior of relevant manufacturers. If in addition to formaldehyde wants to use photocatalyst particles, it needs millions of nano titanium oxide particles to capture formaldehyde. People living in such an environment will certainly inhale photocatalyst particles, which is likely to cause great harm to the human body, even more harmful than formaldehyde.
Secondly, photocatalyst is a kind of catalyst, which does not react by itself. Only under certain conditions can the chemical reaction be promoted, and this condition is very harsh, and it can only be done under the condition of ultraviolet light. Can our house be guaranteed to have ultraviolet rays for 24 hours? All photocatalysts that claim not to use light are not photocatalysts at all. There's no way to justify it. Moreover, it is harmful for the human body to absorb ultraviolet rays for too long. Some companies add accelerant to strengthen the role of photocatalyst, which has hidden dangers of chemical pollution. Long-term use will cause corrosion indoors and cars, and may conflict with some indoor and car equipment such as decoration materials and car films. Finally, photocatalytic pollution removal is only superficial, and it is a passive way, which can not solve the volatile source at all. Imagine: volatile pollution sources (such as furniture) continue to release pollutants (such as formaldehyde for 3- 15 years), and photocatalyst is like an air purifier. The pollution source releases a little, and the photocatalyst absorbs and decomposes a little. However, the human body is also using photocatalyst to adsorb polluted gases, so it is also harmful to the human body.
6. Air freshener (covering the smell is not removing it)
It is out of the question. The smell of air freshener can only cover up the decoration smell for a short time, but it can't be removed. If you smell an odor after decoration, you can basically determine that toxic gases such as formaldehyde and benzene in this space exceed the standard.
7. Folk methods of spreading soil (not working at all)
Put tea residue, grapefruit peel, onion slices, pineapple pieces, etc. In a newly renovated room or fumigate the whole room with white vinegar. It is suggested not to come to in addition to formaldehyde by some indigenous methods. Formaldehyde is very harmful. Putting some onions and pineapples will not solve the problem. In order to solve some harmful smells left by decoration, many people take some "indigenous methods" such as lighting candles, putting pineapples, onions and vinegar to absorb indoor harmful gases. In fact, this practice is unscientific. According to experts, formaldehyde is the main harm to human body after decoration, and it is impossible to absorb formaldehyde by lighting candles. Because candles are mainly composed of animal oil and aliphatic hydrocarbons, and formaldehyde is an unstable organic matter, it will be evenly distributed throughout the room. When the candle burns, formaldehyde is converted into formic acid, and the indoor oxygen is reduced accordingly. In fact, it is competing with people for oxygen, and the reduction of oxygen is harmful to the human body. Moreover, when the candle burns, it will release lead and mercury that are harmful to human body. It is also unscientific for some people to put chopped pineapples at home. Because pineapple can only cover indoor harmful gases, it can't eliminate indoor environmental pollution at all. This is tantamount to "stealing the bell." Therefore, to prevent and control indoor environmental pollution, it is the most undesirable to rely on "indigenous methods", which will only cover up the smell, make people numb, lower their vigilance and do more harm.
8. Activated carbon adsorption method (lasting and remarkable effect)
Activated carbon is a porous carbonaceous substance with a highly developed pore structure. The porous structure of activated carbon provides it with a large surface area, which can fully contact with gas (impurities), thus giving it unique adsorption performance, making it very easy to adsorb and collect impurities. Just like magnetic force, all molecules attract each other. Because of this, a large number of molecules on the pore wall of activated carbon can produce strong attraction, so as to attract harmful impurities to the pore size. However, not all activated carbon can adsorb harmful gases. Only when the pore structure of activated carbon is slightly larger than the diameter of harmful gas molecules, and harmful gas molecules can completely enter (neither too large nor too small), can the best adsorption effect be achieved. This is why activated carbon with different pore structures is created by constantly changing raw materials and activation conditions, which is suitable for various impurity adsorption applications. Experts pointed out that the best way to control indoor formaldehyde pollution is to use activated carbon and open windows for ventilation. Because the structural characteristics of activated carbon are many pores and strong adsorption, many disinfection masks are made of activated carbon. It is best to choose activated carbon with relatively small particles. The smaller the particles, the better the adsorption effect. Generally, newly renovated rooms use activated carbon, and the dosage is per square meter 1 bag (50g). Activated carbon is easy to use, and can adsorb formaldehyde and other polluting gases, without secondary pollution. Secondly, it is also very effective to open the window frequently for ventilation and strengthen indoor and outdoor air convection.