深圳市某区中小学教室可吸入颗粒物现况评价

Descriptive study of indoor air PM10,PM2.5,PM1.0 of primary and middle schools in Shenzhen

目的了解深圳市某区中小学教室空气可吸入颗粒物状况,为改善中小学教学环境卫生状况提供科学依据。方法分层抽取深圳市某区19所中小学114个教室,采用DUSTMATE环境粉尘仪对PM 10,PM 2.5,PM 1.0进行检测。结果 PM 10最大值为0.418mg/m3,超出国家标准1.79倍;PM 2.5最大值为0.142 mg/m3,超出美国EPA新标准3.06倍;PM 1.0最大值为0.056 mg/m3。工业区中小学教室PM 10,PM 2.5,PM 1.0含量高于商业区和居民区,差异均有统计学意义(P值均<0.05)。小学教室PM 10、PM 2.5合格率均高于中学教室;教室PM 10,PM 2.5含量随着楼层增加而下降,差异均有统计学意义(P值均<0.05)。结论深圳市某区中小学教室颗粒物PM 10,PM 2.5,PM 1.0污染情况严重,应引起高度重视并采取综合控制措施。

Objective To investigation the indoor air PM10, PM2.5, PM1.0 of primary and middle Schools in Shenzhen, and provide scientific basis for the government to development relevant health policies, improving the teaching environment and health condition. Methods Stratified sampling method was adopted to select 89 classrooms from 11 kindergartens in a district of She nzhen , the level of PM10, PM2.5, PM1.0 were meas- ured by field monitoring equipment. Results The maximum of PM10 was 0. 396mg/m3 which was over 1.64 times of national standard. The maxi- mum of PM2.5 was 0. 137 mg/m3 , over 2.91 times of the standard of American EPA （ 2006 updated }. The maximum level of PM1.0 was 0. 063rag/ m3. The level of indoor air PM10, PM2.5, PM1.0 in industrial estate schools were much higher than those in residential and trading area{ P〈0.05 }. The normal percent of indoor air PM10, PM2.5 in primary Schools were higher than those in middle school ; and the level of PM 10, PM 2.5 decline with storey rising. Conclusion In study district, the environmental problems of indoor air PM 10, PM 2.5 and PM 1.0 of school must be paid e- nough attention to, and it is necessary to took comprehensive measures to protect the health of children.