The Variations of the Concentration of Formaldehyde in Indoor Air of Newly Decorated Living Rooms / 环境与健康杂志

ABSTRACT

Objective To study the characteristics of the variations of formaldehyde concentration in indoor air of newly decorated living rooms. Methods The formaldehyde concentrations in indoor air of newly decorated rooms were determined with model 4160_2 formaldehyde analyzer during the different periods after decoration. Results At the 10th minute after closing all the windows and doors in the newly decorated rooms, the formaldehyde concentrations of indoor air exceeded the standard nearly as high as 2 times, reached 51% of the peak concentration at the 30th minute, and reached the peak concentration (0.652 mg/m 3) at the 420th minute, then decreased gradually with the prolongation of periods after decoration and accorded with the sanitary standard in the 4th month after decoration. The whole study was carried out at the indoor air temperature of 27.8～29.9 ℃. Conclusion The indoor air pollution by formaldehyde was serious in newly decorated living rooms. The ventilation should be enhanced during the first 4_month period after decoration, so that the formaldehyde concentration could be decreased gradually.