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Estimating infiltration of quasi-ultrafine aerosol by the absorbance method: Air quality in schools
Stehlíková, Pavla ; Braniš, Martin (advisor) ; Hovorka, Jan (referee)
Estimating infiltration of quasi-ultrafine black carbon particles by an absorbance method: air quality in Pavla Stehlíková Abstract This diploma thesis focused on the estimating quasi-ultrafine particles amount in school gyms continue previous study researched air quality in schools. The size-segregated mass concentration of particulate matter was measured in three elementary school gyms in central part of Prague, on periphery of Prague and in a small settlement Černošice during twenty campaigns, from 2005 to 2009. The mass concentration of particulate matter were measured by 5-staged Sioutas impactor. For this thesis we have selected samples on filters with particle size <0,25µm. To evaluate carbonaceous particles amount we used reflectance. Reflectance was transformed into an absorption coefficient (m- 1 .10-5 ). The average levels of absorptions coeficients were higher outdoors (14,66 ± 8,93 m- 1 .10-5 ) than indoors (13,64 ± 8,08 m-1 .10-5 ). The correlations between absorption coeffitients outdoors and indoors were significant for all schools (Spearman's correlation coefficient at intervals 0,834-0,957, regression slope 0,759-1,007), suggesting a high outdoor-to-indoor penetration rate. The weak correlation between absorption coefficients and number of exercising pupils (correlation coefficient 0,059)...
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Estimating infiltration of quasi-ultrafine aerosol by the absorbance method: Air quality in schools
Stehlíková, Pavla ; Braniš, Martin (advisor) ; Hovorka, Jan (referee)
Estimating infiltration of quasi-ultrafine black carbon particles by an absorbance method: air quality in Pavla Stehlíková Abstract This diploma thesis focused on the estimating quasi-ultrafine particles amount in school gyms continue previous study researched air quality in schools. The size-segregated mass concentration of particulate matter was measured in three elementary school gyms in central part of Prague, on periphery of Prague and in a small settlement Černošice during twenty campaigns, from 2005 to 2009. The mass concentration of particulate matter were measured by 5-staged Sioutas impactor. For this thesis we have selected samples on filters with particle size <0,25µm. To evaluate carbonaceous particles amount we used reflectance. Reflectance was transformed into an absorption coefficient (m- 1 .10-5 ). The average levels of absorptions coeficients were higher outdoors (14,66 ± 8,93 m- 1 .10-5 ) than indoors (13,64 ± 8,08 m-1 .10-5 ). The correlations between absorption coeffitients outdoors and indoors were significant for all schools (Spearman's correlation coefficient at intervals 0,834-0,957, regression slope 0,759-1,007), suggesting a high outdoor-to-indoor penetration rate. The weak correlation between absorption coefficients and number of exercising pupils (correlation coefficient 0,059)...
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