In the home decoration industry, high environmental protection has become a universal requirement. In view of a series of damage caused by indoor pollution to human body, who calls it "bad building syndrome". At present, many countries have done a lot of research on the nature and harm of pollution. In addition to the well-known free formaldehyde, other pollution sources will cause damage to human beings in varying degrees. Today, the first-line board brand Xuebao will explain what substances may cause indoor pollution in home decoration.
1. Volatile harmful organic compounds
In the process of home decoration, such as emulsion paint and thermal insulation materials for walls, wallpaper, latex paint, PNC board, a series of plywood, as well as plastic and leather products, as well as a series of indoor man-made panels, such as plywood, europine board, big core board, decorative panel, especially furniture and other products made of density board and plywood, They can release volatile organic compounds (VOCs). More than 350 kinds of indoor harmful substances have been identified by the environmental protection agency of the United States and the European Union.
Different decoration materials and pollution period are also different. In China, a series of tracking tests have been done for three kinds of commonly used decorative products, such as wall coating, floor and wallpaper. It is found that there are floating periods of half a month, one month and two to three months respectively for the three kinds of materials.
Indoor VOC pollution can stimulate skin mucosa and even nervous system, causing allergic symptoms and neurobehavioral abnormalities. In other pathological studies, the stability of tear film decreased, pharyngeal congestion, albumin content in tear cells increased, and the number of inflammatory cells increased significantly. Other animal experiments have shown that it has potential mutagenicity and carcinogenicity.
There are some nuclides including thorium and uranium in decoration materials, which have natural radioactivity. The radiation level of concrete and limestone is low, the radiation level of ceramic tile and marble brick is medium (the radioactivity of ceramic tile glaze is much higher than the back), and the radiation level of granite and slag brick is the highest.
This kind of radionuclide may cause harm to human body, including digestive system, hematopoietic system, immune system, etc.
3. Other pollution sources
In addition to the above two kinds of substances, indoor building materials will also release some other harmful chemicals. For example, sulfide, fluoride; Paint, such as paint, usually contains lead; There are also metal substances, such as nickel, lead, chromium, cobalt, which exist in ceramics and stone materials. Some precipitates may cause damage by polluting the diet or passing through the human body in the form of aerosols.