At room temperature, formaldehyde is an irritating gas, and benzene is usually a colorless and odorless gas. The pungent and dazzling gas that people can feel in a heavily polluted room is formaldehyde.
According to the Sampling Survey Report of Indoor Air Quality in Nine Cities of China issued by Indoor Environment and Health Branch of china environmental science Research Institute and Tsinghua University Building Environment Testing Center, the sampling rate of formaldehyde in indoor air in nine cities is 46.2%.
Decoration pollution will release a large number of volatile compounds, among which formaldehyde is the most harmful to human health. Long-term low-concentration exposure to formaldehyde can lead to sick building syndrome, which makes people feel respiratory irritation, tears and runny nose, dizziness and fatigue. The World Health Organization has listed formaldehyde and benzene as carcinogens.
Extended data:
Scientific methods to reduce the influence of formaldehyde
Understanding the formaldehyde content and indoor air quality in the home by scientific methods is helpful to solve the problem better. Experts pointed out that ordinary families can take some effective measures to reduce indoor decoration pollution.
First of all, pay attention to the selection of materials before decoration, do not over-decorate, and control the pollution sources of decoration.
Secondly, assuming that the decoration pollution has been caused, and clearly know what kind of building materials are caused, it is recommended to replace the seriously polluted ones when conditions permit. In addition, develop good living habits and pay attention to window ventilation.
Third, window ventilation is an effective way to remove indoor air pollution. However, considering the specific situation, such as sandstorm, frequent outdoor heavy pollution weather and high temperature and heat in summer, it is impossible to open the window for a long time.
Many towers have poor ventilation conditions, and many warehouses have no vents. In view of these limited ventilation conditions, an air purifier with "the right medicine" can be used.
There are many kinds of air purifiers with different functions, some for particulate matter, some for benzene series and some for formaldehyde. What kind of indoor decoration pollution is it? Consumers need to choose an air purifier with corresponding purification function.
Many families will use carbon bags to purify the air after renovation. Zhang Yinping pointed out that if only activated carbon, the ability to deal with formaldehyde is not strong.
In addition, benzene series and other substances mainly come from paints and coatings, and are also one of the important sources of indoor decoration pollution. Because paints and coatings mainly exist on the surface of building materials, their duration is shorter than that of formaldehyde. Generally, the content can reach the national standard after being ventilated for several months after decoration.
In fact, indoor air quality, especially decoration pollution, has been a problem in China for about twenty years. The government and academic circles are paying more and more attention to this issue, and the media and ordinary consumers are also paying more and more attention.
In 2002, China promulgated the Indoor Air Quality Standard (GB/T 18883-2002), and subsequent authoritative standards and policies are constantly being updated and promulgated.
On the one hand, these standards are increasing in number; On the other hand, the quality is constantly improving. At present, China is stepping up the formulation of "healthy building standards" and will brand buildings in the future, in which air quality is one of the important indicators to measure the health level of buildings.
People's Network-It is very common that formaldehyde will not volatilize for more than ten years after renovation.