中国部分城市装修后居室空气中甲醛浓度及季节变化

Seasonal Change of Formaldehyde Concentration in the Air of Newly Decorated Houses in Some Cities of China

目的研究居室装修后空气中甲醛污染水平及冬夏季变化趋势。方法按地理位置和装修水平,冬季在北京、上海、重庆、天津、长春、宁夏石嘴山6个城市中选择1487户进行居室空气中甲醛浓度监测,夏季在北京、重庆、宁夏石嘴山3个城市选择787户进行居室空气中甲醛监测。结果夏季与冬季相比,居室空气中甲醛浓度均值分别为(0.290±0.238),(0.301±0.194)mg/m3,基本持平。冬、夏季浓度分别有66.58%、81.48%的住户居室空气中甲醛浓度是国家标准的1～5倍,分别有17.69%、6.35%的住户在0.10mg/m3以下。结论我国城市居室空气甲醛污染严重,装修半年后居室空气中甲醛还处于较高的污染水平。

Objective To investigate the seasonal change of formaldehyde concentration in the air of the newly decorated houses. Methods Indoor air formaldehyde concentrations were determined in 1 487 houses selected in 6 cities in the winter, and in 787 houses selected in 3 cities in the summer. Results In the winter, the investigated houses in which the air formaldehyde concentration was 1-5 times of the Chinese national standard occupied 66.58%, in the summer, they occupied 81.48%. An average concentration [（0.290±0.238） mg/m^3] of indoor air formaldehyde in summer was almost the same as that [（0.301±0.194） mg/m^3] in winter. Conclusion Air formaldehyde still is in a high level in half a year after house decoration finished that means the indoor air formaldehyde pollution is serious in some cities of China.