Why does summer become the season when formaldehyde is more likely to exceed the standard? What other factors will affect the indoor formaldehyde concentration?
1. What is formaldehyde?
Formaldehyde is a toxic and harmful gas, which is irritating and carcinogenic. It can be found in many indoor environments. The main sources of formaldehyde are new building materials and furniture, such as boards, floors, paints, coatings, glue, wallpaper and other new decoration materials that produce formaldehyde. In addition, cleaning products, tobacco products, printed matter, automobiles and industrial processes used in daily life will also release harmful gases such as formaldehyde.
Formaldehyde will irritate the respiratory system, skin and eyes after entering the human body, leading to headache, sore throat, sore throat, runny nose, cough and other symptoms. Long-term exposure to high concentrations of formaldehyde will also increase the risk of chronic diseases such as cancer, liver injury, neuropathy and chromosome aberration. Severe cases may also induce more serious diseases such as leukemia and nasopharyngeal carcinoma, which is self-evident.
Second, why does summer become the season when formaldehyde is more likely to exceed the standard?
1, insufficient ventilation
Especially in hot summer, people usually use air conditioners to close doors and windows to reduce indoor temperature. However, due to the lack of ventilation, indoor air pollutants have increased significantly.
2. High temperature
The temperature is higher in summer. The boiling point of formaldehyde is 19 degrees. When this temperature is reached, formaldehyde will evaporate in the form of gas. The research shows that every time the indoor temperature rises 1 degree Celsius, the formaldehyde volatilized from wooden furniture and floors will increase the formaldehyde concentration in indoor air by 0. 15-0.37 times. In summer, the average temperature is above 28 degrees, and the highest temperature approaches 40 degrees, which accelerates the release of formaldehyde in indoor furniture and decoration materials, resulting in an increase in indoor formaldehyde content.
The air humidity is high in summer.
It is rainy and rainy in summer, and the humidity in the air is high and the air pressure is low, which reduces the convection between indoor air and outdoor air and is easy to cause the retention of polluted gas. Humid environment is also one of the conditions of formaldehyde pollution, because formaldehyde has hydroxyl functional groups with affinity for water molecules and is easily soluble in water, and formaldehyde in furniture is easily attracted by water molecules, thus causing pollution.
Third, in addition, what other factors will affect the indoor formaldehyde concentration?
1. Influence of different decoration degrees on indoor formaldehyde concentration
Wood floors, artificial plywood, wallpaper wall covering, latex paint, synthetic fibers, adhesives and other building materials commonly used in interior decoration will release formaldehyde, and the formaldehyde content released by different decoration degrees is different, thus affecting indoor air quality. Because the economic conditions are improving day by day, interior decoration is generally high-grade. According to the usage of indoor floor, wall coating, plywood and density board, all formaldehyde concentration data are divided into medium and good decoration degree. The average formaldehyde concentration in the environment with good decoration degree is obvious. The degree of decoration in Gao Qian is average, and the over-standard rate of the decorated environment is 50% higher than that of the moderately decorated environment. Therefore, the quality of decoration materials used after decoration is better, but there are more decoration materials and more formaldehyde pollution.
2. The influence of furniture with different decoration materials on indoor formaldehyde concentration.
At present, most of the furniture is artificial board, which is beautiful and cheap, and it is the first choice for ordinary residents. The artificial boards for furniture, such as plywood, blockboard (large core board), density fiberboard, particleboard, etc., mostly use urea-formaldehyde resin as adhesive and are usually treated with formaldehyde. Urea-formaldehyde resin is formed by the synthetic reaction of urea and formaldehyde, and then curing agent is added. Because excessive formaldehyde is added in the synthesis process of urea-formaldehyde resin, a large amount of free formaldehyde remains in the resin, and at the same time, the formaldehyde that has participated in the reaction will also generate unstable groups, which will decompose during the use of the board and release formaldehyde. Therefore, when these materials are introduced into the living room, the indoor formaldehyde concentration exceeds the standard.
3. The influence of different decoration time on indoor formaldehyde concentration.
There is a significant difference in indoor formaldehyde concentration in different decoration time, and the indoor formaldehyde concentration in places decorated within half a year is significantly higher than that in Gao Qian after half a year. The concentration of formaldehyde decreased with the increase of decoration time. Within 2-3 years after renovation, the probability of formaldehyde concentration exceeding the standard is more than half. It will take more than 10 years to fully meet the standards.
Fourth, then, how should we get rid of formaldehyde at home?
1. Place activated carbon.
Except formaldehyde, activated carbon is not suitable for large-scale use, but it can be placed in closets, shoe cabinets, drawers, bookcases and other places with relatively narrow space.
2, regular ventilation.
You can open the window in the morning and evening when the weather is cool, which can effectively reduce the concentration of indoor pollutants, especially in families with pregnant women or babies. If the pollution source is complicated, it needs to be handled by professionals outside in addition to formaldehyde Company.
3. Except formaldehyde company
It is a scientific and effective method to find in addition to formaldehyde Company to control indoor pollution. However, there are different brands of in addition to formaldehyde institutions in the market. When you choose a reliable in addition to formaldehyde company, you should first look at the reputation of the industry, the quality of in addition to formaldehyde products and whether there are abundant construction cases.
The above is some knowledge about formaldehyde. Summer is the season when formaldehyde, toluene and other pollutants are released the most, and it is also the best season to clean up pollution. Everyone should pay more attention to prevention and control.