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为了解北京市顺义区不同室内环境与室外大气PM_(2.5)浓度,进一步分析室内、外PM_(2.5)浓度的关系,于2013年5月—2014年4月采用环境空气PM_(2.5)重量法测定该区3个室内监测点和1个室外监测点的大气PM_(2.5)浓度。结果显示,3个室内监测点(办公室、住宅和学校)的PM_(2.5)浓度中位数分别为53.7、55.8、90.1μg/m~3,室外PM_(2.5)浓度为109.9μg/m~3;按照GB3095—2012《环境空气质量标准》规定的二级标准(75μg/m~3),学校和室外PM_(2.5)浓度超标;住宅、办公室大气PM_(2.5)浓度低于室外,差异均有统计学意义(P<0.05),而学校与室外PM_(2.5)浓度无明显差异;随着室外大气PM_(2.5)浓度的升高,住宅、办公室PM_(2.5)浓度呈上升趋势(P<0.05)。提示本次监测地区的室内大气PM_(2.5)浓度易受到室外影响。
In order to understand the PM_ (2.5) concentrations in different indoor and outdoor atmospheres in Shunyi district of Beijing, the relationship between indoor and outdoor PM_ (2.5) concentrations was further analyzed. From May 2013 to April 2014, PM_ (2.5) The PM_ (2.5) concentrations in the atmosphere of 3 indoor monitoring sites and 1 outdoor monitoring site were measured. The results showed that the median PM_ (2.5) concentrations of three indoor monitoring sites (office, residential and school) were 53.7, 55.8 and 90.1 μg / m ~ 3 respectively, and the outdoor PM 2.5 concentration was 109.9 μg / m ~ 3 (2.5 μg / m 3) at school and outdoors was exceeded according to the second-grade standard (75 μg / m 3) as set forth in the Ambient Air Quality Standard of GB3095-2012; the PM_ (2.5) concentrations in the residential and office air were lower than those in the outdoors (P <0.05), while there was no significant difference between school and outdoor PM_ (2.5) concentrations. With the increase of outdoor PM_ (2.5) concentration, the PM_ (2.5) ). It is suggested that the indoor PM_ (2.5) concentration in this monitoring area is vulnerable to outdoor influences.