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人在室内停留的时间约占60～80％以上。尤其采暖季节,在室内存在污染源的情况下,室内空气中SO_2悬浮性颗粒物质(SPM)浓度常可高于室外大气,室内SO_2可为室外的1.5～2倍。因此,人在室内的暴露量常常数倍于室外。我国北方广大居民冬季采暖和作饭以燃煤为主,其污染程度可能要大大高于国外资料介绍的数值。我们于1982年在河北省某市对不同采暖方式的22个住户进行了室内空气污染调查,同时进行室外大气的对比调查。现将结果报告如下:
People stay indoors for about 60 ~ 80% of the time. Especially during the heating season, SO2 suspended particulate matter (SPM) concentration in indoor air may be higher than that in outdoor atmosphere, indoor SO2 may be 1.5 to 2 times of outdoor when there are sources of pollution in the interior. Therefore, the amount of indoor exposure is often several times more than outdoor. The majority of residents in northern China in winter heating and cooking to coal-based, its pollution may be much higher than the value of the introduction of foreign information. We conducted a survey on indoor air pollution in 22 households in different heating modes in a city of Hebei Province in 1982, and conducted a comparative survey of outdoor air. The results reported below: