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目的了解北京市朝阳区公共场所室内甲醛污染随装修后时间和季节的变化趋势。方法 2012—2013年抽取辖区内3类公共场所,包括文化娱乐、商场超市及住宿类场所;利用大气采样器采集室内空气进行甲醛项目的检测。结果公共场所室内空气中甲醛存在超标情况,装修后半年到1年的公共场所室内甲醛浓度要高于装修后小于半年时间的,如2012年分别为(0.095 09±0.033 57)和(0.051 94±0.032 40)mg/m3,2013年分别为(0.063 56±0.043 50)和(0.045 13±0.033 49)mg/m3,2年间差异均有统计学意义(t值分别为7.145、3.096,P<0.05);夏季甲醛浓度高于其他季节。结论北京市朝阳区公共场所室内空气中甲醛污染,在春夏季释放增加。
Objective To understand the trend of indoor formaldehyde pollution in public places in Chaoyang District of Beijing with time and season after decoration. Methods From 2012 to 2013, three public places in the area were selected, including cultural entertainment, shopping malls, supermarkets and accommodation facilities. Indoor air samples were collected using atmospheric samplers for the formaldehyde test. Results Formaldehyde in indoor air of public places exceeded the standard. The indoor formaldehyde concentration in public places in the first six months to one year after decoration was higher than that in renovated buildings by less than six months. For example, in 2012, the formaldehyde concentrations in indoor air were (0.095 09 ± 0.033 57) and (0.051 94 ± (0.063 56 ± 0.043 50) and (0.045 13 ± 0.033 49) mg / m3 in the year of 2013. The average annual mean was statistically significant (t = 7.145, 3.096, P <0.05, respectively) ); Summer formaldehyde concentration higher than other seasons. Conclusions Formaldehyde pollution in indoor air of public places in Chaoyang District of Beijing increased in spring and summer.