--formaldehyde. Mainly from artificial boards, it will stimulate people's respiratory system, causing diseases such as pharyngitis and asthma. It is listed as a suspicious carcinogen by the World Health Organization. China stipulates that the concentration of formaldehyde in the living room cannot exceed 0.08 mg/m3. - Benzene. Including benzene, toluene and xylene, mainly in paints, glues and various interior wall coatings. Benzene can damage the body's hematopoietic function, cause blood diseases, and can cause cancer. It has been identified as a carcinogen by the World Health Organization. The "Indoor Air Quality Hygienic Code" formulated by the Ministry of Health in 2001 stipulates that the standard of benzene in indoor air is less than 0.087 mg per cubic meter. - Ammonia. Indoor ammonia is mainly derived from concrete antifreeze. Ammonia gas mainly causes damage to the respiratory tract, eye mucosa and skin of the human body, causing symptoms such as tearing, headache, and dizziness. In 2001, the Code for Indoor Environmental Pollution Control of Civil Buildings stipulated that the concentration of ammonia in indoor air is less than 0.2 mg per cubic meter. --radon. It is found in construction cement, slag bricks, decorative stone and soil. Earthworms are a radioactive substance whose main hazard to the human body is lung cancer. According to reports, sputum is the second leading cause of lung cancer in addition to smoking. The national standard for strontium content in China is: new houses are less than 100 BQ/m3; old houses are less than 200 BQ/m3. In addition, the radioactivity of building materials can also cause radiation damage to the human body. This is mainly the radioactive material produced by the decay of radium, radon and potassium in natural stone. According to the relevant provisions in the "Limits of Hazardous Materials for Interior Decoration Materials", according to the radioactive level of decoration materials, natural stone products are divided into three categories: A, B, and C. For interior decoration, Class A stone should be selected. Misunderstanding of room decoration Scientifically determine the decoration design. Even for qualified products, it is best not to use a large area of ​​material, especially the floor material of the room. Be sure to consider the carrying capacity of the space, otherwise it may cause damage due to excessive accumulation of certain harmful substances. The decorative design of the room should not use a large amount of color paint for the one-sided pursuit of color, to prevent indoor lead pollution. Scientifically choose the construction process. In addition to special requirements, generally do not lay a large core board under the composite floor; correctly select the wall sealing material; use the large core board to hit the cabinet and the heating cover, which must be sealed with formaldehyde sealant, preferably not Exposed areas; paints are best used with thicker paint and good sealing. Scientific and reasonable accommodation. Newly renovated houses should not be rushed to stay. They should be ventilated indoors for a period of time, usually in a month or so, and then staying after the release of harmful gases. If you have any conditions, you should first ask the indoor environmental testing department to conduct tests, listen to the opinions of experts, and adopt scientific management methods for the problems to determine the appropriate check-in time.
It is intermediate to be used many chemicals.
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