As we all know, the renovation of new houses is one of the main causes of serious indoor air pollution, so do you know the small coup to effectively remove formaldehyde? Let's take a look at the small coup to effectively remove formaldehyde with me.
Small coup to effectively remove formaldehyde 1 1. Activated carbon adsorption method.
Put activated carbon, bamboo charcoal and so on. Adsorb formaldehyde in the room. Advantages: cheap and practical, simple process, non-toxic and harmless to human body. Disadvantages: easy saturation failure, poor quantity control and incomplete in addition to formaldehyde.
Second, the plant decontamination method.
A room of about 10 square meter needs two pots of plants with a height of 1.5 meters to take effect. This method can remove formaldehyde from the air by photosynthesis of plants during the day. Advantages: green and pollution-free, beautifying the environment and harmless to human body. Disadvantages: Limited by time and space, it can only play a good role in sunny days, and it can't completely remove formaldehyde, and it is only effective for medium and low pollution.
Third, negative ion in addition to formaldehyde method.
A large number of ecological negative ions with small particle size and high activity are released through the air negative ion generator or negative ion air purifier, so that they can actively decompose harmful substances in the air and react with them to decompose into nontoxic carbon dioxide and water. Advantages: no dead angle, no secondary pollution, convenient and worry-free. At the same time, it can supplement "air vitamins" for the air and can be used for a long time to optimize the air. Disadvantages: the technical requirements are high, and the national patented technology needs to be adopted.
Fourth, the window ventilation method.
Long-term window ventilation, so that indoor toxic substances flow out of the room with the air. Advantages: zero cost, ready to use. Disadvantages: Formaldehyde volatilization is greatly affected by temperature, and the volatilization time is as long as 3- 15 years, which makes it impractical to ventilate vacant new houses all the year round.
5. Chemical removal method.
Some formaldehyde scavengers can be used to react with free radical formaldehyde to achieve the purpose of scavenging. Advantages: simple operation and good first aid effect. Disadvantages: Formaldehyde can not be completely removed, and it will continue to volatilize after a certain period of time, which is easy to produce secondary pollution.
Sixth, the method of placing special fruits and vegetables.
You can put grapefruit peel, pineapple, onion and other fruits and vegetables in the indoor corner to remove the smell of formaldehyde. Advantages: convenient implementation and obvious deodorization effect. Disadvantages: it has no practical significance for removing formaldehyde, but it covers up the irritating taste of formaldehyde.
Small coup to effectively remove formaldehyde 2 1, negative ion purification
The molecular size of formaldehyde is about 0.27 nm. After surface species, adsorbents and negative ions combine with bacterial cells in the air, the energy inside the cells is transferred, and the structure changes, leading to their death. The inhaled particles such as smoke, dust and pollen floating in the air gather and naturally settle, thus achieving the purpose of purifying the air.
Advantages: simple use; High-voltage discharge and other technologies make the air produce negative ions, which combine with particulate pollutants in the air to make tiny particles gather and settle, which has a certain effect on purifying the air.
2. Soak in water, vinegar and black tea to remove formaldehyde.
Many people on the Internet say that because formaldehyde is soluble in water, you can put more pots at home to absorb formaldehyde, or soak it in vinegar or black tea. It is a fact that formaldehyde is soluble in water, water, alcohol and ether. Free formaldehyde in the air will dissolve into it when it meets water during movement, which is similar to the adsorption principle of activated carbon. The contact area between a basin of water and air is only the size of a basin, while the specific surface area of internal pores of 1g activated carbon can reach the size of a football field. Even if you put a hundred pots of water in the room, the adsorption effect will not be much stronger than a small bag of activated carbon. Therefore, it is obviously unrealistic to use water, black tea and vinegar to adsorb formaldehyde. The release of formaldehyde is closely related to indoor temperature and humidity. With the increase of temperature, the release of formaldehyde will greatly increase. The experimental results show that when the relative temperature in the air increases 10%, the indoor formaldehyde emission will increase by about 5%.
3, coconut charcoal in addition to formaldehyde
Coconut shell charcoal is a new type of activated carbon, which is composed of gray and black particles. Gray particles are a mixture of coconut shell activated carbon, photocatalyst and tourmaline, which has strong adsorption capacity and high adsorption rate.
4. Nanjing Stone in addition to formaldehyde
Na Shi Jing is a popular material for controlling formaldehyde pollution in recent years. It has two kinds of small particles: black and white. It can not only absorb a lot of formaldehyde gas, but also decompose these formaldehyde gases into water vapor and carbon dioxide.
5. Photocatalysts outside in addition to formaldehyde
After adding platinum photocatalyst, nano-TiO _ 2 is excited by electrons, and free electrons will soon combine with absorbed oxygen to generate superoxide radicals, thus realizing the redox reaction of formaldehyde and catalyzing the decomposition of formaldehyde under the condition of no illumination.
6. Plants absorb formaldehyde
Plants can inhale some harmful substances through photosynthesis, but the effect of this method is extremely limited. The reason for this is the following：
1, plants usually inhale some harmful substances during the day, but they have no such function at night. The law of people's life is generally outdoor during the day and indoor at night. When people need air purification most, plants can't play a corresponding role.
2. The harmful substances absorbed by plants are extremely limited. The national standard requires that the formaldehyde emission value is less than 0.08 mg/m3, and the formaldehyde in most newly decorated houses is not less than 0.2 mg/m3, while the formaldehyde absorbed by the high formaldehyde absorption efficiency is only 20 micrograms per hour. A room of 100 square meter, with a height of 3 meters, a formaldehyde value of 0.2 mg/m3, and 1.800 pots of green radish. To reduce formaldehyde to 0.08 mg, almost the whole room space needs to be filled, which is still carried out under the condition of sufficient light during the day, and it is necessary to ensure that no formaldehyde is released during the absorption process. In fact, formaldehyde has been continuously released from the renovated furniture. Therefore, plants can only play an auxiliary role in controlling harmful substances such as formaldehyde and benzene.
7. Plant sources
Purifying and atomizing plant-derived air into terpenoids has a wide range of biological activities, but relying on traditional production methods of plants is one of the bottlenecks in popularization and application. Using synthetic biology strategy to create microbial "cell factory" is expected to provide advanced technology for low-cost and sustainable supply of terpenoids from plants. Tanshinone is the main fat-soluble active component of Salvia miltiorrhiza, which belongs to norditerpenoids of rosin alkanes.
Small coup to effectively remove formaldehyde 3 1. Removal of indoor formaldehyde: ventilation method.
Through the circulation of indoor air, the content of harmful substances in indoor air can be reduced, thus reducing the harm of such substances to human body. People often close doors and windows in winter, so the indoor and outdoor air can't circulate. Not only the formaldehyde content in indoor air will increase, but also radon will accumulate continuously, even reaching a very high concentration.
Radon is the second leading cause of lung cancer (smoking ranks first). It is estimated that radon causes 3% to 14% of all lung cancers. It is easier for smokers to get lung cancer, which is the main reason for non-smokers to get lung cancer.
Ventilation and radon reduction is the most effective method for all mankind at present.
Advantages: good effect and no cost.
Disadvantages: It takes a long time, and formaldehyde removal generally takes more than three years.
2. Removing indoor formaldehyde: deodorization method
Formaldehyde deodorant can capture and decompose harmful pollutants such as formaldehyde, benzene and ammonia, kill harmful microorganisms such as germs and mites, purify the air and eliminate odor.
Governance misunderstanding
1. It is unrealistic to use water, black tea and vinegar to adsorb formaldehyde. When the relative humidity in the air increases by 10%, the indoor formaldehyde emission will increase by about 5%.
2. In the process of purifying the air with plants, the plants themselves will be hurt and even die.
3. Using orange, pineapple and grapefruit peel can not only remove formaldehyde, but also increase the indoor formaldehyde content.
4. Green plants that absorb formaldehyde, such as green radish, aloe, Sanskrit, etc., have fast absorption speed and obvious effect, but will lead to secondary release. Be sure to replace or throw them away regularly.