深圳市不同类型公共场所室内PM_(10)与PM_(2.5)污染情况及相关性

Pollution and correlation of indoor PM_(10) and PM_(2.5) in different types of public places in Shenzhen City

目的了解深圳市不同类型公共场所室内PM_(10)与PM_(2.5)污染状况,分析其相关性。方法采用分层随机抽样方法抽取深圳市10家医院、9家宾馆、11家商场进行监测,采用美国TSI公司的光散射式粉尘测定仪(DUSTTRAKTNⅡ8532),在开始、中间、结束共4个时间段进行PM_(2.5)与PM_(10)的1 min时间加权平均质量浓度。结果深圳市公共场所室内PM_(10)质量浓度为90μg/m3,PM_(2.5)质量浓度为32μg/m3。不同类型的公共场所室内PM_(2.5)与PM_(10)的浓度存在差异。从公共场所室内PM_(2.5)对PM_(10)的贡献率为49%(26%~59%)来看,室内的PM_(10)中PM_(2.5)占到49%,PM_(2.5)与PM_(10)存在高度相关性。结论深圳市公共场所室内PM_(2.5)与PM_(10)污染状况不容忽视,政府应将其纳入常规监测范围。

[Objective]To investigate the pollution status of indoor PM10 and PM2.5 in different types of public places in Shenzhen,and to analyze their correlation. [Methods] Stratified random sampling method was applied to select 10 hospitals,9 hotels and 11 stores for monitoring,by using light scattering type dust measuring instrument of American TSI company（DUSTTRAKTN II8532）. Four periods（the beginning,middle and the finish） were chosen to check 1 minute time-weighted average concentration of PM2.5 and PM10. [Results] The concentrations of indoor PM10 and PM2.5 in public places were 90 μg/m^3 and 32 μg/m^3 in Shenzhen.The concentrations of indoor PM2.5 and PM10 varied in different types of public places. The contribution rate of PM2.5 to PM10 in public places was 49%（26%-59%）,and PM2.5 accounts for 49% of indoor PM10,and there was a high correlation between PM2.5 and PM10. [Conclusion] The pollution of indoor PM2.5 and PM10 in public places in Shenzhen can＇t be ignored,and the government should incorporate it into the scope of routine monitoring.