SRI Center for Physical Sciences and Technology, Savanorių ave. 231, 02300, Vilnius, Lithuania.
Helmholtz Centre for Environmental Research-UFZ, Permoserstrasse 15, 04318, Leipzig, Germany.
Environ Sci Pollut Res Int. 2020 May;27(13):15592-15606. doi: 10.1007/s11356-020-08093-9. Epub 2020 Feb 20.
Aerosol particle number (PNC) and mass concentrations (PMC) were studied in 11 primary schools during the 2017-2018 school years (from September to May) in Vilnius, Lithuania, with the aim to evaluate the main aerosol pollution sources and its levels. Expeditious information on the total aerosol particle concentration over the full range of sizes (from 0.01 to > 1 μm) was estimated using a condensation particle counter (CPC). Particle number and mass concentrations in the size range of 0.3-10 μm were measured and estimated using an optical particle sizer (OPS). The use of aerosol particle size spectra (OPS) in school lodgements facilitated the identification of the main sources of indoor air pollution. The main sources responsible for the elevated levels of indoor PN and PM aerosol concentrations were determined: local canteens in the absence of ventilation (particle concentrations up to 97,500 part/cm (CPC)), the school-grader activity during the lesson breaks (275-586 μg/m), soft furniture and carpets in the classrooms and corridors (~ 200 μg/m), and in some cases (city center) elevated outdoor aerosol pollution levels (16800-18,170 part/cm). Elevated aerosol pollution levels were also due to the occasional sources: construction works during lessons (200-1000 μg/m), scraping the exterior walls of buildings near schools (up to 1600 μg/m), and the use of petrol-powered trimmers during cutting of green plantings (22500-66,400 part/cm (CPC)).
在立陶宛维尔纽斯的 11 所小学中，研究了 2017-2018 学年（9 月至 5 月）期间的气溶胶粒子数（PNC）和质量浓度（PMC），目的是评估主要的气溶胶污染来源及其水平。使用凝结核计数器（CPC）快速估计全粒径范围内（从 0.01 到 >1 μm）的总气溶胶粒子浓度。使用光学粒子计数器（OPS）测量和估计 0.3-10 μm 粒径范围内的粒子数和质量浓度。在学校宿舍使用气溶胶粒子大小谱（OPS）有助于识别室内空气污染的主要来源。确定了导致室内 PN 和 PM 气溶胶浓度升高的主要来源：通风不良的当地食堂（颗粒浓度高达 97,500 个/立方厘米（CPC））、课间休息时的学校级活动（275-586 μg/m）、教室和走廊中的软家具和地毯（~200 μg/m），在某些情况下（市中心）还存在室外气溶胶污染水平升高（16800-18,170 个/立方厘米）。偶尔的来源也会导致气溶胶污染水平升高：上课期间的施工工程（200-1000 μg/m）、学校附近建筑物外墙刮擦（高达 1600 μg/m）以及使用汽油动力修剪机修剪绿植（22500-66,400 个/立方厘米（CPC））。
