Citizens who want to decorate new houses in winter may have to pay attention to it. Experts say that this season's renovation is particularly likely to cause excessive benzene. Zhou Chunliang, director of the Provincial Air Pollution Control Center's indoor air detection department, introduced that they had sampled 420 homes that had been renovated since the winter, of which 195 had exceeded benzene, accounting for 46.4% of the total. Most of the reasons for this situation are due to the fact that the "three bases and two sides" have not dried out when painting.
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"The newly-renovated houses use environmentally-friendly materials. Why are there excessive benzene?" Yesterday, Liu Hai, a resident of the Furong Court in Changsha City, was extremely depressed by the test report.
Liu Hai was married on New Year's Day and wanted to catch a new house before New Year's Day, so he began renovations in early November. Liu Hai has strictly selected materials with environmental protection signs during the renovation. After the 35-day renovation period, the house was ventilated and air-conditioned for two weeks. However, the results of professional indoor air testing surprised him. "The benzene exceeded the standard, and my home's indoor air exceeded 5.6 times that of benzene," he said in frustration.
Experts told him that while brushing the wall paint, he brushed the paint five times as required by the “three bottoms and two sides.†But because of his eagerness and the low temperature, the paint did not dry out, and then covered the paint behind. So that the harmful substances in the paint can not be evaporated, eventually causing excessive standards.
Zhou Chunliang introduced newly renovated homes in the winter and spring season. The most harmful substances in the indoor air exceeding the standard are benzene, toluene, xylene (collectively known as benzene series) and total volatile organic compounds (TVOC). The indoor disease control department of the Provincial Disease Control Center has sampled 420 users since the end of the winter, including 195 households that exceeded benzene, exceeding the standard rate of 46.4%, and exceeding 172 toluene and xylene levels. For 41%, there were 181 households with excessive total volatile organic compounds (TVOC) exceeding the standard rate of 43.1%. The over-standard rates were all above 40%, of which the one with the highest benzene exceeding the standard value was 0.93 mg/m3. , exceeding the standard 8 times.
Into the winter and spring seasons, low temperature, high humidity, benzene series and TVOC in wall paints and paints are not volatile. Zhou Chunliang suggested that during the winter and spring seasons, it is necessary to pay attention to the construction techniques of the wall and wait for the wall to dry before proceeding to the next process. In addition, after the completion of the renovation, do not rush to stay, at least ventilated and dry for more than a month, so that benzene, toluene, xylene and TVOC and other harmful substances fully evaporated. In the event of indoor air pollution exceeding standards, experts can be asked to help find the source of pollution and conduct professional management.
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