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|Type:||Artigo de evento|
|Title:||Vocs Concentrations At Metropolitan Area Of São Paulo, Brazil|
|Author:||De Albuquerque E.L.|
Camargo De Lima Tresmondi A.C.
|Abstract:||The atmospheric concentrations of VOC were measured in the urban atmosphere of Metropolitan Area of São Paulo (MASP), Brazil. The main emission sources in each sampling site were identified. Passive and active sampling methods were applied. Selected VOC among alkanes, cycloalkanes, and aromatic compounds were analyzed. VOC concentrations varied a lot in each campaign in function of aspects related to sampling site, characteristics of emission sources, and changes in meteorological parameters. In active campaigns, VOC concentrations showed distinct profile of time variation for different seasonal and meteorological conditions. In passive sampling procedure, VOC experimental sampling rates were estimated from the validation of passive sampling process. These experimental sampling rates were the first found in an urban atmosphere of Brazilian cities. This made possible to perform a simultaneous passive monitoring campaign in eight different sites at MASP during ≈ 5 mo. In all samples, the VOC found in highest concentrations were (overall average concentration) toluene (16.5 μg/cu m), m,p-xylenes (7.6 μg/cu m), n-hexane (6.7 μg/cu m), ethylbenzene (4.1 μg/cu m), and 1,2,4-trimethylbenzene (3.1 μg/cu m). These results will aid in the development of monitoring programs for VOC and creation of public policies for air quality management in Brazil. This is an abstract of a paper presented at the 105th AWMA Annual Conference and Exhibition (San Antonio, TX 6/19-22/2012).|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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