城市住宅室内空气污染物时空特征分析

TEMPORAL AND SPATIAL CHARACTERISTICS OF INDOOR AIR POLLUTANTS IN URBAN RESIDENTIAL BUILDINGS

检索Web of Science、PubMed、ScienceDirect、中国知网、万方和维普数据库2000—2019年公开发表的国内外城市住宅室内空气污染的相关研究文献,获得15项研究,11723条数据,并系统分析了我国城市住宅室内空气污染物在采暖季和非采暖季的污染现状、变化及成因。Meta分析结果表明:室内空气污染物浓度在采暖季和非采暖季差异(季节性差异)显著(P<0.05),标准化均数差(SMD)为0.43,95%置信区间(CI):[0.19,0.66];其中PM 2.5、NO 2、苯的季节性差异在2013—2019年SMD(95%CI):0.64[0.46,0.82],较2000—2012年的SMD(95%CI):0.99[0.11,1.87]有所缓解;与国外相似地区室内污染物SMD(95%CI):0.54[0.21,0.86]比较,我国严寒、寒冷地区室内污染物SMD(95%CI):0.90[0.37,1.43],季节性差异更大。因此,我国城市住宅室内污染受采暖影响较大,严寒、寒冷地区更为明显;近年来,部分污染物季节性差异有缓解趋势。

By retrieving the relevant research literature on indoor air pollution of domestic and foreign cities published by Web of Science,PubMed,ScienceDirect,CNKI,Wanfang and Vip network Database from 2000 to 2019,we gained 15 studies,11723 data items.The current situation,changes and causes of indoor air pollutants in urban area in the heating season and non-heating were analyzed systematically.The meta-analysis showed that the indoor air pollutant concentration was significantly different between the heating season and the non-heating season(P<0.05),and the standardized mean difference(SMD)was 0.43,and 95%confidence interval(CI)was[0.19,0.66].The seasonal difference of PM 2.5,NO 2 and benzene in 2013—2019 was with SMD of 0.64 and 95%CI of[0.46,0.82],while in 2000—2012 it was with SMD of 0.99,95%CI of[0.11,1.87],getting relived to some extent;compared with similar foreign areas,with SMD of 0.54,95%CI of[0.21,0.86],the seasonal difference of China’s severe cold and cold regions was greater with SMD of 0.90,95%CI of[0.37,1.43].Therefore,the indoor air quality of urban residential buildings in China was greatly affected by heating,and in the severe cold and cold regions it became more obvious.In recent years,the seasonal differences in some pollutants got alleviated.