Compostos orgânicos voláteis presentes na baixa atmosfera de áreas públicas da cidade de Curitiba-PR, Brasil e sua influência sobre as folhas de Tillandsia stricta

• Ano de defesa: 2009
• Autor(a) principal: Azevedo, Roosevelt de
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Positivo; Brasil; Pós-Graduação; Programa de Pós-Graduação em Gestão Ambiental; UP
• Palavras-chave em Português: Poluição atmosférica; BTEX; Tráfego urbano; Bioindicadores; Danos à vegetação; CNPQ::CIENCIAS BIOLOGICAS; CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA
• Link de acesso: https://repositorio.cruzeirodosul.edu.br/handle/123456789/2370

In this study the occurrence of volatile organic compounds, particularly benzene, toluene, ethylbenzene, and xylenes (BTEX), in some public areas of Curitiba, Paraná, Brazil, was evaluated. The concentrations of the studied compounds were then related to the density of vegetation present in each area. Passive diffusive samplers were used for the gaseous pollutants, later detected and quantified by Gas Chromatography equipped with Flame Ionization Detector (GC/FID). Average benzene concentrations were between 3.9 to 6.1 µg.m-3, with higher values occurring where the vegetation was characterized as poorly dense. For toluene, average concentrations ranged from 6.5 to 7.2 µg.m-3 while for the other compounds average concentrations were between 1.1 and 2.2 µg.m-3. According to toluene/benzene, m+p-xylene/benzene, and o-xylene/benzene ratios the source of BTEX in the studied areas is the vehicle emission. The effect of such pollutants was evaluated by means of a bio indicator, Tillandsia stricta. Variation in total chlorophyll content as well as in stomatic density and leave’s tissue were detected in some plant samples and may be related to the BTEX concentrations found in the studied areas