Experimental Study on the Factors Affecting Indoor PM2.5 Concentration
Abstract
With the frequent haze, PM2.5 pollution has aroused widespread concern. As people stay longer indoor, the concentration of PM2.5 indoor affects more on human health. Several main factors affecting indoor PM2.5 concentration is examined. Experimental conditions are as follows, tightly closed doors and windows, no mechanical ventilation and purifying measures turned on, and at the same time, the outdoor is slightly polluted or even worse. The experimental results show that the ratio I / O of indoor and outdoor air pollutant concentration is less than 1. In the case of heavy pollution outdoor, the indoor crowd played the role of biological vacuum cleaners, so that indoor PM2.5 concentration decreased. Indoor smoking significantly increased the concentration of PM2.5, the concentration per square meter increased up to 0.5 mg/m3. The concentration of PM2.5 in the room of the buildings adjacent the street will further increase due to the increase of the traffic flow and the idle speed of the traffic jam. The conclusion is smoking, street construction can lead to an increase of indoor PM2.5 concentration. A huge increase in the concentration of PM2.5 is caused by smoking, so, people is recommended to pay enough attention to avoid smoking indoors or timely ventilation. I/O ratio with people indoor is more less than that of no people indoor when outdoor pollution is serious.
Keywords
Indoor, PM2.5, Factors, Relativity, Smoking.
DOI
10.12783/dtetr/ecame2017/18482
10.12783/dtetr/ecame2017/18482
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