Abstract
This study focused on measuring the pollution characteristics, the monthly and seasonal variation rule of formaldehyde in the teaching machine room of Guangxi Normal University from March 2016 to February 2018, and the correlation between formaldehyde concentration and temperature or humidity were also analyzed. The results indicated that seasonal and monthly variation rule of formaldehyde changed with temperature and humidity in the teaching machine room. The concentration of formaldehyde was higher in summer and autumn, while was lower in winter and spring. Further analysis indicated that there was a strongly positive correlation (R2>0.87, R2>0.85, R2>0.81, p<0.01) between formaldehyde concentration and temperature, relative humidity or absolute humidity. It concluded that the formaldehyde concentration increased with the increase in the temperature and humidity. The maximum concentrations of formaldehyde in sitting breathing area and standing breathing area were 0.442mg/m3, 0.445mg/m3 and 0.184mg/m3, 0.213mg/m3 in July 2016, 2017, respectively. After eleven years, the formaldehyde in the teaching machine room was still seriously exceeded the standard (0.1mol/L), and decreased the temperature or humidity could effective alleviate the level of indoor formaldehyde concentration.
Highlights
With the improvement of economic level and life style, people′s concept of production and life is changing constantly [1], and in order to make the indoor environment more comfortable and beautiful, the upsurge of decoration continues to rise [2]
The release of pollutants (VOCs and formaldehyde) from the inner wall covered by wallpaper increased the prevalence of atopic dermatitis [9]
A total of 9 sampling points set in the teaching machine room, which 5 sampling points distributed on each diagonal line
Summary
With the improvement of economic level and life style, people′s concept of production and life is changing constantly [1], and in order to make the indoor environment more comfortable and beautiful, the upsurge of decoration continues to rise [2]. The problem of indoor air pollution has become more and more seriously, which has critically endangered human safety that a lot of research has been carried out at domestic and abroad [3, 4]. Formaldehyde is one of the causes of human disease [5], the weekly prevalence of rhinitis or eye, throat, skin symptoms were 18.8%, 11.6%, 15.6% and 11.1%, respectively [6]. The exposure of indoor formaldehyde may increase the risk of common cold in children [7,8]. The release of pollutants (VOCs and formaldehyde) from the inner wall covered by wallpaper increased the prevalence of atopic dermatitis [9]. Formaldehyde is a common indoor air pollutant, which has obvious effect on human health [10]
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