Many people now buy new houses, and naturally cannot be renovated. Even if many families choose decorative building materials that meet national testing standards or even high standards, they will inevitably suffer from formaldehyde. Let's take a look at the harms of "killer" formaldehyde.
Formaldehyde aqueous solution is "formalin". The chemical formula of formaldehyde is CH2O, which is a colorless, easily soluble and irritating toxic gas soluble in water. Formaldehyde in the air can be absorbed by the human body through the respiratory tract, and formaldehyde is generally stored in aqueous solutions. A 35% to 40% formaldehyde aqueous solution is called "formalin", which is highly corrosive and is mainly used for the preservation of specimens and corpses.
Formaldehyde is a primary carcinogen
The World Cancer Organization's International Agency for Research on Cancer (IARC) formally identified formaldehyde as a primary carcinogen in 2004. Fully proved that formaldehyde can cause nasopharyngeal cancer, sinus cancer, lung cancer and blood cancer "leukemia".
Furniture and wall paint are the main sources of indoor formaldehyde
Newly renovated dwellings, man-made boards, decorative materials, building materials, furniture, wall paints, and coatings make extensive use of adhesives. Is the main source of indoor formaldehyde. In addition, household products, disinfectants, textiles, and cosmetics all contain formaldehyde. Approximately 3-18 micrograms of formaldehyde is released per 100 square centimeters of plywood for 1 hour.
Each time the temperature rises by 1 degree, the formaldehyde concentration increases by 0.15-0.37 times
Formaldehyde is a volatile gas. For every 1 degree increase in temperature, the formaldehyde concentration increases by 0.15-0.37 times. The boiling point of formaldehyde is 19 ° C. When the indoor temperature is 30 ° C, the amount of formaldehyde released ***. Summer is the season of formaldehyde, especially Huangmeitian. High temperature and humidity are most likely to promote the volatilization of formaldehyde.
Indoor formaldehyde release cycle from 3 to 15 years
It is generally recognized that newly renovated houses are vacant for 3 months, that is, in fact, 3 months is far from eliminating formaldehyde. Long volatility cycle and high toxicity are the two characteristics of formaldehyde. The indoor formaldehyde release cycle is generally 3-15 years.
Formaldehyde poisoning symptoms
1. Get up early in the morning and feel stuffy, nauseous and dizzy;
2. The family often catches a cold and the immunity decreases;
3. Uncomfortable throat, foreign body sensation, and poor breathing;
4. Indoor people suffer from a variety of respiratory diseases and do not heal for a long time;
5. Massive skin allergies, or multiple skin diseases; long-term infertility of newlyweds;
6. Women's irregular menstruation, normal pregnant women give birth to deformed fetuses, or cause breast cancer;
7. Indoor plants die, pets get sick, behave abnormally, or even die;
8. Sinusitis, sore throat, pneumonia, asthma, etc., and even canceration;
9. The child coughs, sneezes, decreases his intelligence and immunity, and has no energy;
10. Inducing children or weak people to suffer from high-risk diseases such as leukemia and heart disease.
Formaldehyde can cause leukemia
International cancer research structure IARC has fully demonstrated that formaldehyde can cause leukemia. There are about 40,000 new cases of leukemia in China every year, 50% of which are children, and most of them are 2-7 years old. Home decoration causes indoor environmental pollution and is considered the main cause of the disease.
Formaldehyde easily causes fetal malformations
A report issued by the US Environmental Protection Agency in 2010 pointed out that air pollutants such as smoke, particulate matter, paint odors (formaldehyde, benzene), and ozone in indoor air should attract people's attention. Excessive exposure to these pollutants will increase the risk of preterm birth and low birth weight. Premature birth and low birth weight are important factors causing mental retardation and fetal malformation.
Window ventilation removes formaldehyde most effectively
Activated carbon and green plants have the effect of removing formaldehyde, but the most effective and direct way is to open the window for ventilation. In summer, the temperature is high and the formaldehyde volatilizes quickly. The doors and windows of a newly renovated house should be closed tightly for a few days. This will help formaldehyde be released from the floor and home as soon as possible, and then open the window for convection ventilation. Repeatedly, the effect of removing formaldehyde will be better.
Activated carbon can be selected to have a smaller particle size, with an average of 15 grams per square meter. Green plants should choose negative-tolerant varieties suitable for indoor growth and larger leaves. Such as Penny, Celestial Star, Evergreen, Dragon Blood Tree, Green Ficus, Oleander, Green Dill.
Mechanical ventilation is optional in haze days
High temperatures in summer, most people choose to close the window to open the air conditioner. How to prevent heatstroke, haze and formaldehyde in summer, the best way is to use a fresh air purifier to achieve mechanical ventilation. The fresh air purifier is an air purifier with a fresh air device, which filters the outdoor air and sends it indoors. The two-way circulation fresh air system simultaneously removes indoor formaldehyde, benzene, and CO2 to the outdoors. Mechanical ventilation is actually better than window ventilation, because it is not affected by wind direction and speed, and guarantees indoor and outdoor air replacement for 24 hours.
Formaldehyde affects our health. Please choose natural materials as much as possible during the decoration process.