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Indoor Air Quality Assessment of Elementary Schools in Curitiba, Brazil |
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| Authors: | R H M Godoi D Avigo Jr V P Campos T M Tavares M R R de Marchi R Van Grieken A F L Godoi |
| Institution: | 1. Department of Environmental Engineering, Federal University of Parana, Curitiba, PR, Brazil 2. Centro Universitário Positivo, UnicenP, Curitiba, PR, Brazil 3. Institute of Chemistry, Federal University of Bahia, Salvador, BA, Brazil 4. Analytical Chemistry Department, S?o Paulo State University, UNESP, Araraquara, SP, Brazil 5. Department of Chemistry, University of Antwerp, 2610, Antwerp, Belgium |
| Abstract: | The promotion of good indoor air quality in schools is of particular public concern for two main reasons: (1) school-age children spend at least 30% of their time inside classrooms and (2) indoor air quality in urban areas is substantially influenced by the outdoor pollutants, exposing tenants to potentially toxic substances. Two schools in Curitiba, Brazil, were selected to characterize the gaseous compounds indoor and outdoor of the classrooms. The concentrations of benzene, toluene, ethylbenzene, and the isomers xylenes (BTEX); NO2; SO2; O3; acetic acid (HAc); and formic acid (HFor) were assessed using passive diffusion tubes. BTEX were analyzed by gas chromatography–ion trap mass spectrometry and other collected gasses by ion chromatography. The concentration of NO2 varied between 9.5 and 23?µg m?3, whereas SO2 showed an interval from 0.1 to 4.8?µg m?3. Within the schools, BTEX concentrations were predominant. Formic and acetic acids inside the classrooms revealed intermediate concentrations of 1.5?µg m?3 and 1.2?µg m?3, respectively. |
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