There are many sources of decoration pollution, and a considerable part of them are caused by improper materials used in the decoration process. It includes volatile organic compounds such as formaldehyde, benzene and xylene. How much do you know about this? In the decoration process, try to choose materials with less organic pollutants to effectively reduce the pollution caused by decoration! In this small series, you will introduce the common decoration pollution, and add decoration for everyone. Cold knowledge of pollution!
Home improvement pollution No. 1 killer formaldehyde pollution introduction Many decoration materials contain a certain amount of formaldehyde, after the new home, many owners are deeply affected by formaldehyde pollution. What is formaldehyde pollution? What kind of harm does it cause to the human body and the environment? Xiaobian is your science.
What is formaldehyde pollution?
Formaldehyde (chemical formula HCHO) is a colorless, water-soluble liquid with a strong volatility and a pungent odor. Indoor formaldehyde is mainly derived from building materials, furniture, artificial boards, various adhesive coatings and synthetic textiles.
Form of formaldehyde pollution
Formaldehyde reacts with ionic chlorides in the air to form dichloromethyl ether, which is a carcinogen. Formaldehyde can be adsorbed and enriched by high-specific surface materials in the room, and re-released when the indoor temperature rises, which aggravates the pollution effect. China's "Indoor Air Quality Standards" stipulates that the limit of formaldehyde in indoor air is 0.10mg/m3.
Sources and hazards of formaldehyde pollution
The amount of formaldehyde emitted by fossil fuel combustion is small, but smoking is an important source of formaldehyde. It is determined that about 2.4 mg of formaldehyde can be emitted per cigarette, and the concentration of formaldehyde in the flue gas directly inhaled from the cigarette may exceed the warning concentration by more than 400 times. At present, all kinds of artificial boards and their furniture are usually made of urea-formaldehyde resin as an adhesive, which may be the largest source of formaldehyde. Formaldehyde has a strong stimulating effect on the mucous membranes of the eyes, nose and throat. The most common symptoms are irritation and headache, which can cause allergic dermatitis and asthma. Since formaldehyde can react with proteins to form nitrogen methine compounds to coagulate and denature proteins in cells, cell function can be inhibited.
Method and indicator for detecting formaldehyde pollution
Small goldfish are raised in shallow basins with a liquid surface depth of less than 5 cm. If the small goldfish die within one week, the indoor formaldehyde concentration is at least 3 to 5 times higher than the normal standard. It is also possible to self-test the indoor air environment by using plants, and place the plants in different positions in the home. If the plants quickly wither, the environment in the home is polluted, and the degree of withering indicates that the degree of pollution is different. In addition, it can also detect formaldehyde pollution in the home through professional testing instruments. Generally speaking, the free formaldehyde contained in the home does not exceed 0.08mg/m2.
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