唐山农村地区冬季室内外PM_(2.5)浓度污染特征

The pollution characteristics of indoor and outdoor PM_(2.5)in the rural areas of Tangshan in winter

为了解中国北方农村地区冬季室内外PM_(2.5)污染特征,选择河北唐山某农村燃煤与非燃煤室内外PM_(2.5)进行实验研究。结果表明:(1)燃煤采样点室内外PM_(2.5)分别为47.9~370.0、14.8~145.0μg/m^3,非燃煤采样点室内外PM_(2.5)分别为13.6~217.0、10.9~131.0μg/m^3。(2)室内外PM_(2.5)浓度具有一定的相关性。(3)采样期间的20d内,根据《环境空气质量标准》(GB 3095—2012)二级标准(PM_(2.5)24h均值限值为75μg/m^3),燃煤采样点室外PM_(2.5)超标率为10%,而非燃煤采样点为5%;根据GB 3095—2012一级标准(PM_(2.5)24h均值限值为35μg/m^3),燃煤采样点室外PM_(2.5)超标率为35%,而非燃煤采样点为20%;根据《建筑通风效果测试与评价标准》(JGJ/T 309—2013)规定室内PM_(2.5)的日均值应小于75μg/m^3,燃煤采样点室内PM_(2.5)超标率为65%,而非燃煤采样点为35%。

In order to understand the pollution characteristics of indoor and outdoor PM 2.5 in the rural areas of Northern China,one of rurals in Tangshan was studied as the sampling site.The results showed that:(1)the indoor and outdoor PM 2.5 in the coal-fired sample points were 47.9-370.0 and 14.8-145.0μg/m 3.The indoor and outdoor PM 2.5 in the non-coal-fired sample points were 13.6-217.0 and 10.9-131.0μg/m 3.(2)The concentrations of indoor and outdoor PM 2.5 had a certain corelation.(3)During the sampling period(20 d),10%of the outdoor PM 2.5 in the coal-fired sample points exceeded the second standard of“Environmental air quality standard”(GB 3095-2012)(PM 2.5 24 h mean limit was 75 g/m 3),and 5%of that in the non-coal-fired sample points;35%of the outdoor PM 2.5 in the coal-fired sample points exceeded the first standard of GB 3095-2012(PM 2.5 24 h mean limit was 35 g/m 3),and 20%of that in the non-coal-fired sample points;65%of the indoor PM 2.5 in the coal-fired sample points exceeded“The standard of the measurement and evaluation for efficiency of buiding ventilation”(JGJ/T 309-2013)(PM 2.5 daily mean values was less than 75 g/m 3),and 35%of that in the non-coal-fired sample points.