Research On Indoor Air Quality Evaluation Of Traditional And Modern Residential Houses In Rural Guizhou

With the rapid economic development,the types of residential buildings in rural areas have undergone great changes.The indoor air quality of residential houses is closely related to the physical and mental health of residents,so it is very necessary to evaluate the indoor air quality of rural residential houses.Guizhou,as a place where ethnic minorities live,coupled with rapid economic development in recent years,has diversified construction types in rural areas,which can be divided into traditional houses and modern houses as a whole.At present,the theoretical research on indoor air quality in this area is relatively weak.Therefore,in response to this problem,this article will take the rural areas of Guizhou as the research area,and take the typical traditional houses and modern houses in the rural areas of Guizhou as the research objects,and carry out evaluation research on the indoor air quality of the traditional houses and modern houses in the rural areas of Guizhou.This article mainly does the following research work:(1)Investigate the basic characteristics of traditional and modern houses in Guizhou rural areas through questionnaire surveys,and analyze the factors affecting the indoor perceived air quality of traditional and modern houses.The results of the study show that Most residents believe that indoor perceived air quality is good,and the factors that significantly affect the indoor air quality of traditional and modern houses are basically the same,including cleaning frequency,indoor smoking status,window opening habits,cooking energy,and heating status.(2)In the sample of the questionnaire survey,16 typical residential houses were selected,and field measurements were conducted in summer and winter(non-heating period and heating period).Research indicates:In summer,the average indoor concentrations of CO,CO₂,PM2.5,PM10 and TVOC in traditional and modern houses meet the standard requirements,and the average concentrations of pollutants tested in traditional houses are basically higher than those in modern houses.During the non-heating period in winter,the average concentration of pollutants in the living rooms of traditional houses and modern houses basically met the standard.The average concentrations of CO,CO₂,PM2.5,and PM10 in the living rooms of traditional houses were higher than those of modern houses.The average concentration of pollutants tested in the bedrooms of traditional houses meets the standard requirements;the average concentrations of CO,CO₂ and TVOC in the bedrooms of modern houses also meet the standard requirements.The average concentrations of PM2.5 and PM10 are relatively high,160.23±33.46?g/m³,179.14±41.49?g/m³.The average concentrations of CO₂ and TVOC in the kitchens of traditional and modern houses are basically up to the standard,and the average concentrations of PM2.5 and PM10 are relatively high;the average concentrations of pollutants tested in the kitchens of traditional houses are higher than those of modern houses.During the winter heating period,the average concentration of indoor pollutants tested when using open combustion heating in traditional and modern houses exceeded the limit specified by the standard;the average concentration of indoor PM2.5,PM10 and TVOC in modern houses was significantly higher than that in traditional houses.When a wood stove with a chimney is used for heating,the average indoor concentration of CO,CO₂,and TVOC is lower;the average concentration of PM2.5 and PM10 is higher,the traditional houses respectively are188.70±164.57?g/m³,217.59±199.40?g/m³,and the modern houses respectively are 168.67±157.54?g/m³,and 199.88±212.20?g/m³.The average concentration of pollutants tested indoors when electric stoves are used for heating are all lower than the limit specified in the standard;there is no significant difference between the average concentration of indoor pollutants tested in traditional houses and modern houses.(3)Use the comprehensive index method to evaluate the indoor air quality of traditional and modern houses in rural Guizhou in summer and winter(non-heating period and heating period).The evaluation results show that the indoor air quality of traditional houses and modern houses in summer is generally better,and there is no significant difference between the two.The indoor air quality of traditional houses during the non-heating period in winter is worse than that in summer.Among the tested pollutants,CO and PM2.5 have a greater impact on indoor air quality;similarly,the indoor air quality of modern houses is also poor compared with summer,PM2.5 and PM10 have a greater impact on indoor air quality.There is no significant difference in indoor air quality between traditional houses and modern houses during the heating period in winter.Compared with the non-heating period in winter,the indoor air pollution of traditional houses and current houses is more serious during the heating period in winter.Among them,the indoor air pollution in open-burning heating houses is more prominent,and CO and PM2.5 have a greater impact on indoor air quality;the use of wood stoves with chimneys is second,and PM2.5 and PM10 have a greater impact on indoor air quality;The indoor air of the residential house is not polluted when the electric stove is used for heating.