拉萨市新装修住宅室内空气甲醛变化分析

Analyses on change of formaldehyde in indoor air of newly decorated house in Lhasa

对拉萨地区三户新装修住宅室内空气中甲醛含量进行为期数月的监测,三户不同类型新装修室内空气中均检出甲醛。拉萨地区新装修室内空气中甲醛呈缓慢下降的趋势,波动较小,通过分析,是由于拉萨地处高原,空气干燥温度偏低,抑制了甲醛早期大量挥发。因此没有出现甲醛含量急剧下降趋势,而是缓慢下降。随着时间的推移,三户住宅室内甲醛均逐渐降低,但由于早期材料内的甲醛不能及时挥发到空气中,致使材料中甲醛残留扩散慢,从而达标时间可能延长。

Formaldehyde had been monitored in indoor air of three newly renovated houses in Lhasa for several months,and the indoor air of three different renovated styles house were detected formaldehyde. In Lhasa,formaldehyde in indoor air of newly renovated was slow decline, less volatile, through analysis,Lhasa is located in the plateau,air drying and temperature are low,suppresses volatilizing much formaldehyde into air at early time,formaldehyde content and therefore a sharp decline in the trend does not appear, but slow decline. Over time, the three houses indoor formaldehyde were gradually reduced, but because of formaldehyde within the material can＇t be timely evaporate into the air,causing the formaldehyde in material residual and diffusion is slow,So compliance time may be extended.