During the “National Quality Month†in September, the newspaper and the Municipal Quality Supervision Bureau jointly launched the “Free Testing of Home Improvement Air Quality†activities. Recently, the quality inspection institute of the inspection unit announced the test results. Among the 90 households registered in Nanjing, 48 households with indoor air pollutants formaldehyde, benzene and TVOC were qualified, 42 households were unqualified, and 42 of them all exceeded the standard. Among them, there are two TVOC pollutants exceeding the standard.
The cloakroom has become a serious disaster area
According to the data, 32 of the 42 households that failed the test were completed within 6 months, and 28 of them were completed within 3 months. The experts of the Municipal Quality Inspection Institute reminded the public that the first six months after the completion of the renovation was a period of high pollutant concentration and the fastest period of dissipation. If there are conditions, it is recommended to leave the work after the completion of the renovation for a long enough time to stay.
In the decoration family where the formaldehyde is unqualified, most of the families are pursuing the decoration effect, and the artificial floor panels, the surface painting and the complicated patterns are widely used. "The release of these single-product pollutants may be up to standard, but they are densely placed in a limited space, and the release of pollutants will form a superposition effect, causing indoor air pollution." Experts told reporters that from the inspection situation, As long as a large number of MDFs are used in such closed spaces as the cloakroom, formaldehyde is detected to exceed the standard. “Some of the citizens took part in the test because they felt that the cloakroom had a big taste. As a result, the air quality really exceeded the standard, but the test data of the single plates that make up the cloakroom were qualified.â€
No smell is not pollution
After seeing the test results, many families have raised the question: It is obvious that the home has not smelled after the decoration and ventilation. Why do the pollutants exceed the standard? In this regard, the expert explained: "It is not reliable to smell with the nose. If it is in a polluted environment for a long time, it will produce a 'smell-passivation' phenomenon. Even if there is smell in the house, the owner is not easy to detect.
Some citizens also suggested that the use of air purifiers can eliminate indoor pollution? Experts remind that although air purifiers can absorb indoor air pollutants, due to the large amount of pollutants in the initial stage of decoration, it is necessary to regularly clean the air purifier filter. The saturated filter element can easily release the originally absorbed pollutants, causing secondary pollution of the indoor environment.
High temperature and high humidity, formaldehyde is the fastest
The release of formaldehyde is a slow, continuous, uninterrupted process. According to experts, the formaldehyde volatilization period can last from 3 to 15 years depending on the decoration materials and time.
"According to the chemical characteristics of formaldehyde, under high temperature and high humidity, the resin will accelerate hydrolysis, increase the amount of formaldehyde released, increase the temperature by 1 time, increase the humidity by 12%, and increase the formaldehyde emission by about 15%. On the contrary, under the condition of low temperature and low humidity, Formaldehyde is released slowly and the amount of release is also low. Experts believe that to reduce formaldehyde pollution, home decoration and ventilation time should be chosen in the summer.
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