成都市部分新装修居室空气中甲醛的浓度

目的了解新装修居室空气中甲醛污染情况。方法测定了28户新装修家庭和单位的室内空气和家具的甲醛浓度,同时还测定了其中的2个办公室空气中甲醛的个体接触浓度。结果家具中的甲醛浓度中位数(0.260mg/m3)显著高于室内空气中的浓度(0.062mg/m3),Z=-5.098,P<0.0001;办公室空气中甲醛浓度的中位数为0.046mg/m3,个体采样的中位数为0.078mg/m3,个体接触水平虽略高于空气中的浓度,但差异无显著性(Z=-1.905,P=0.057)。结论家具是室内空气中甲醛污染的来源之一,室内空气采样能较好地代表个体接触水平。

Study on Concentrations of Formaldehyde in Newly Decorated Apartments

Objective To investigate the concentrations of formaldehyde in newly decorated apartments. Methods In this study we monitored the concentrations of formaldehyde in indoor air of 28 newly decorated apartments and offices and furnishings. In order to analysis the correlation between formaldehyde concentration of indoor air and personal exposure level, 17 persons' exposure levels were measured by personal air monitoring in 2 offices. Results The medians of formaldehyde concentrations in indoor air and furnishings were 0.062 mg/m3 and 0.260 mg/m3 respectively. The concentration of formaldehyde in furniture was significantly higher than that in indoor air (Z=-5.098,P<0.000 1). The medians of formaldehyde concentration in indoor air of offices and personal exposure level were 0.046 mg/m3 and 0.078 mg/m3 respectively, which showed no statistically significant difference (Z=-1.905,P=0.057). Conclusion Furnishings were the significant resource of formaldehyde and had an impact on indoor air quality in newly decorated apartments. The monitoring results of formaldehyde concentration in indoor air could reflect the personal exposure level. In order to maintain indoor air quality, ventilation rate should be increased by opening windows frequently.