Abstract:
Objective To study the level of fine particulate matter(PM
2.5) from smoking in public place and to evaluate the feasibility of PM
2.5 to be used as an index for monitoring smoking quantificationally.
Methods TSI Sidepak AM510 was used to measure the concentration of PM
2.5 in four types of public place such as rest room in bath center,restaurant,karaoke bar,and cyber cafe in Tongzhou district,Beijing.The data was collected and the relation between smoking and indoor PM
2.5 concentration in public place was analyzed.
Results The average concentration of indoor PM
2.5 in public places with and without smoking was 435.7±471.9,220.6±205.5μg/m
3,respectively,and there was a significant difference between them(Z=-7.348,P<0.001).Furthermore,there were remarkable differences between the average concentration of indo or PM
2.5 of the different smoking levels(χ
2=271.447,P<0.001).The average concentration of indoor PM
2.5 was positively related to the ratio of smokers(r=0.754,F=23.708,P<0.001).When ventilation(score≤2)was relatively bad,the average concentration of indoor PM
2.5 was 515.9±441.2μg/m
3,and when the ventilation score >2,the concentration was 115.9±84.7μg/m
3(Z=-19.791,P<0.001).The difference between them had statistical significance,and the difference was found both at places with and without smoking(P<0.001).Nomatter howthe ventilation was,the average concen trations of indo or PM
2.5 in the place with smoking were all obviously higher than that of without smoking(P<0.05).
Conclusion Smoking could increase the concentration of indoor PM
2.5 in public places and the average concentration of PM
2.5 may reflectindo or air pollution from smoking in publicplace.