Residential Indoor Air Quality Evaluation And Influence Factors Analysis In Chongqing Area

Residential indoor pollution has become increasingly serious, the Chinese center for disease control and prevention statistics show that China’s excess deaths caused by indoor air pollution each year up to 111000 people, the excess number of outpatient service 220000 person-time, excess emergency number 4.3 million. The WHO suggests that nearly half of the people exposed to indoor air pollution. Residential indoor environment due to the complexity of functions, different room pollution influence factors is not the same. To investigate different residential room indoor environment pollutants and the factors affecting the influence factors, this paper USES the concept of the combination of subjective and objective research, through the questionnaire and the questionnaire measured way, analyzed the influence of different environmental factors of the room, to evaluate the indoor air quality, the development level of environmental factors may affect the residential indoor pollutants concentration, so as to guide users avoid disadvantages, to better improve the environmental pollution.A large survey investigation is carried in Chongqing main nine areas, a total of 2200 questionnaires, the recovery of 1624 questionnaires, 1536 valid questionnaires. By analyzing impact of the form of residential, residential area, decoration years and the number of family members smoked daily on different rooms, it is found that the sitting room and bedroom thermal environment, sitting room and bedroom ventilated environment, the kitchen ventilation environment are affected by different degrees. Health association analysis by two binary logistic regression found that if you are too cold to sleep in win, what’s the sitting room the light during the day, you also often hear indoor and outdoor sound vibration and can’t sleep if you close doors and windows, if you shut doors/windows and don’t open air conditioning fan to sleep in summer, whether the lampblack effect is good, how serious is the kitchen smell six factors are still significant relationship to health.We measure indoor pollutants level of 50 residentials indoor formaldehyde, benzene, toluene, xylene, TVOC and PM2.5 and analysis its relationship with typical residential indoor environment factors, the results shows that: in the outdoor air pollution situation(200 m) can significantly affects the concentration of formaldehyde, benzene series and PM2.5, suburban housing is lower than the urban of concentration of benzene content; Temperature has prominent effects on chemical pollutants, relative humidity prominent has effects on particulate matter; Floor types can significantly influence the bedroom TVOC concentration; Ventilation can effectively improve the concentration of sitting room formaldehyde and kitchen TVOC; Using chemical commodities can significantly increase the concentration of benzene content levels; Air purifier and plant can reduce air pollutant concentration to a certain degree. We use Comprehensive Index Method invented by professor Shen Jinming of Tongji University to judge indoor air quality. We found that the kitchen pollution is most serious, followed by the sitting room, the last is the bedroom. It is recommended that the user control pollution according to different function room with various kinds of pollution, we need to improve indoor environment according to the characteristics of the different rooms: the sitting room focuses on reducing number smoking, outdoor air filter and reducing the use of chemicals; Bedroom focuses on improving thermal wet environment, concise decoration, reasonable sound and light conditions; kitchen focuses on cleaning habits.