Particulate matter and student exposure in school classrooms in Lublin, Poland

This study reports particle mass (PM) and number (PN) concentrations and student exposure in classrooms in three secondary schools in Lublin, Poland, during the winter (February–March) and summer (May–June) season measurements. The emissions from residential coal combustion and particle generating didactic experiments carried out in the classrooms significantly influenced the particle concentrations. In the winter season the average student exposure to PM and PN was respectively 2.1±0.4 (mean±standard deviation) and 1.5±0.5 times higher than outdoors.