Main pollution sources of household formaldehyde
One is interior decoration materials. Such as particleboard, fiberboard, composite floor, plywood, paint, etc. , containing formaldehyde, benzene, xylene, styrene and other volatile harmful substances 10.
The second is building materials. Such as granite, marble and some glazed tiles, will produce radioactive substances, such as radium, thorium, potassium and radon. Long-term absorption of radon decay radiation can lead to lung cancer and nasopharyngeal cancer.
The third is indoor supplies. Harmful substances such as pesticides, correction fluids and cosmetics commonly used by people also produce substances such as carbon monoxide and dichloromethane.
National standard for household formaldehyde emission
1, China people's and national standard "Hygienic standard for formaldehyde in indoor air" stipulates that the maximum allowable concentration of formaldehyde in indoor air is 0.08 mg/m3.
2. People's Republic of China (PRC) national standard "Solid Wood Composite Flooring" stipulates that the formaldehyde emission of Grade A solid wood composite flooring is less than or equal to 9 mg/100g; The formaldehyde emission of grade B solid wood composite floor is equal to 9 mg-40 mg/100 g. ..
3. The National Technical Requirements for Environmental Label Products-Artificial Wood Board stipulates that the formaldehyde emission in artificial wood board should be less than 0.20 mg/m3; The formaldehyde emission from the wood floor should be less than 0. 1.2mg/m3.
Indoor formaldehyde content standard: according to the national mandatory standard, after closing doors and windows 1 hour, the formaldehyde emission per cubic meter of indoor air shall not be greater than 0.08mg；; If it reaches 0. 1-2.0 mg, 50% normal people can smell the smell; When it reaches 2.0-5.0 mg, the eyes and trachea will be strongly stimulated, and symptoms such as sneezing and coughing will appear; 10 mg or more, dyspnea; If it reaches more than 50 mg, it will cause critical diseases such as pneumonia and even lead to death.
How to control indoor formaldehyde
Ventilation mode: pollution is released the most just after renovation. The effect of deodorant is not much better at this time. The best way is to open the window for ventilation. After the renovation of the new house, it must be ventilated every day.
Plant method: First of all, it is safer than chemical in addition to formaldehyde method, and there is no secondary pollution. Compared with chemical removal method, it is better because it is extracted from plants. With the improvement of people's living standards and the strengthening of environmental protection concept, this pure herbal method of removing decoration pollution will be more and more popular.
Activated carbon method: it can adsorb harmful substances, but don't think that it will be tasteless at home immediately after using activated carbon. Activated carbon lasts for 3 to 6 months, then it will be saturated and lose its activity.
The above is the relevant content of the national indoor formaldehyde standard issued by Bian Xiao. I believe many friends have understood. According to the content standard explained by Bian Xiao, you can have a reference for formaldehyde detection in your home to see if the indoor formaldehyde in your home meets the standard. If it exceeds the standard, it must be removed in time, so as to better protect the health of family members. Well, that's the end of Bian Xiao's introduction. Want to know more about other contents of national indoor formaldehyde standards, please continue.