What are the sources of indoor air quality pollution?
We know more about the dangers of indoor pollution than indoor pollution. Through the long-term analysis of indoor air composition analysis, the main sources of indoor air pollutants are mainly the following aspects: construction itself, interior decoration, furniture, combustion products, human activities and air conditioning syndrome.
- The pollution caused by the building itself is mainly ammonia. The concrete admixtures and antifreeze used in construction work contain a large amount of ammonia substances, which are slowly released into the wall from the wall due to changes in environmental factors such as temperature and humidity, resulting in ammonia in the indoor air. Pollution. In addition, the radioactive gas generated from the decay of radioactive materials in stone, floor tiles and ceramic tiles in underground soils and buildings can also cause excessive levels of radioactive materials in the room.
- The pollution caused by interior decoration is mainly formaldehyde, benzene and other pollution. Mainly from the use of paint, plywood, particle board, foam filler, interior wall coating, plastic veneer and other decorative materials. For example, artificial boards such as plywood, blockboard, medium density fiberboard and particleboard, because the adhesive used in these materials is formaldehyde-based urea-formaldehyde resin, and the residual and unreacted aldehydes in the board are gradually released to the surrounding environment. Other decorative materials that contain formaldehyde and are likely to be emitted to the outside world include wall coverings, wallpapers, chemical carpets, foams, paints and coatings.
- The pollution caused by furniture is mainly pollution of formaldehyde, benzene and heavy metals. According to the survey, indoor air pollution caused by furniture has become the third largest source of pollution after building pollution and decorative pollution. At present, furniture products are dominated by wood-based panel furniture (also known as panel furniture), and wood-based panels for furniture are medium-density fiberboard, of which formaldehyde is the most important environmental indicator in panel furniture. However, the production of furniture is not large. Some small workshops and underground furniture processing factories use unqualified wood-based panels and paints to produce inferior quality products due to backward production technology. At the same time, some soft furniture, such as various sofas, especially fabric sofas, mattresses, etc., mainly use benzene-containing glue, and also emit various harmful gases.
- Indoor air pollution caused by combustion products. Cooking and smoking are the main pollutants of indoor burning. The smoke components in the kitchen and the smoke components in cigarettes are extremely complex. More than 3,800 substances have been analyzed, which are present in the air in a gaseous or aerosol state. Among them, gaseous substances account for 90%, and many substances are carcinogenic.
- The body’s own metabolism and the volatile components of various domestic wastes are also a cause of indoor pollution. People in the indoor activities, in addition to the body itself through the respiratory tract, skin, sweat glands can discharge a large number of pollutants, other daily life, such as makeup, pest control, etc. can also cause air pollution, so when the number of people in the room is too much, it will make people tired, head Faint, even shock. In addition, people who are indoors will increase the indoor temperature and promote the proliferation of microorganisms such as bacteria and viruses.
From the above analysis, we can understand that the factors causing indoor air pollution are various. The pollution of indoor air caused by the release of harmful substances such as formaldehyde, benzene and homologues contained in decoration materials is only one of them. However, it is the most important and common factor in indoor air pollution. When people do not fully understand the factors affecting indoor air quality, the point of eliminating indoor air pollution points to decorative materials, and it appears that green decoration is used. Even if the material is environmentally friendly, the concept of green decoration can be understood.
There are five types of pollution sources that affect indoor air quality:
1. Fuel combustion products such as carbon dioxide, carbon monoxide, nitrogen oxides, alkanes and aldehydes;
2. Use of chemicals and other aerosols, such as pesticides. , deodorant, mousse, hair gel, etc.;
3. Use of electronic products, such as household appliances, laser printers, photocopiers, etc.;
4. Release of building materials and decorative materials, such as brick, cement, asbestos products, plywood, particle board Plastic veneers, paints, carpets, etc. will release a large amount of toxic and harmful gases;
5. Human activities such as breathing, skin secretions, indoor pets and flowers discharge and smoking.
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