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Doctoral Thesis
DOI
https://doi.org/10.11606/T.6.2003.tde-12072021-184134
Document
Author
Full name
Rogerio Aparecido Machado
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2003
Supervisor
Committee
Assunção, João Vicente de (President)
Colacioppo, Sérgio
Gatti, Luciana Vanni
Guekezian, Marcia
Philippi Júnior, Arlindo
Title in Portuguese
Avaliação de compostos orgânicos voláteis em ambientes interiores climatizados
Keywords in Portuguese
Avaliação
Compostos Orgânicos Voláteis
Interiores Climatizados
Poluição do Ar de Interiores
Abstract in Portuguese
Tomando por base a Portaria 176 da Agência Nacional de Vigilância Sanitária que cita a necessidade do levantamento de dados sobre compostos orgânicos voláteis - COV - existentes em ambientes fechados climatizados de atividades ocupacionais, foram analisados os compostos orgânicos voláteis no ar interior e exterior de escritórios climatizados do centro da cidade de São Paulo com ausência de tabagismo. As análises foram quantitativas para tetracloreto de carbono, clorofórmio, benzeno e tolueno e qualitativas para as demais substâncias. As amostras foram coletadas através de tubos com carvão ativado e as análises realizadas por Cromatografia Gasosa/Espectrometria de Massas. Foram validados os métodos de coleta e análise utilizados, segundo critério do National Institute for Occupational Safety and Health (NIOSH). Os resultados mostraram ausência de clorofórmio e apenas algumas amostras acusaram traços de tetracloreto de carbono, mas em 76,7% das amostras foi encontrado benzeno e em 100% foi encontrado tolueno, sendo estes em concentrações similares às encontradas na literatura estrangeira. Qualitativamente também foram encontradas as mesmas substâncias citadas nos ambientes interiores climatizados de outros países. Como conclusões foi verificada a existência de COV potencialmente nocivos para saúde, no ar interior de ambientes climatizados, mesmo com ausência de tabagismo. A metodologia adaptada para realizar as coletas e análises demonstrou ser urna alternativa viável e confiável em relação às existentes na literatura técnica. Também foi constatado que a maioria dos COV presentes no ar dos escritórios pesquisados tinham por fonte o ar externo e que os condicionadores de ar tipo SPLIT e de janela concentram as substâncias no ar interno, enquanto os condicionadores centrais promovem a diluição destas substâncias.
Title in English
Analysis of volatile organic compounds in acclimatized indoor environments
Keywords in English
Acclimatized Indoor
Analysis
Indoor Air Pollution
Volatile Organic Compounds
Abstract in English
In accordance with Portaria 176 of Agência Nacional de Vigilância Sanitária, that mentions the need of a data collection of volatile organic compounds -VOC- existing in occupational activity closed acclimatized environments, volatile organic compounds were analyzed in the indoor, and outdoor air of São Paulo City downtown acclimatized offices, where there was no tobacco smoking. Analyses were quantitative for carbon tetrachloride, chloroform, benzene, and toluene, and qualitative for the other substances. Samples were taken into tubes with activated carbon and analyses were performed by Gas Chromatography/Mass Spectrometry. The sampling and analyzing methods used were validated in compliance with criteria of the National Institute for Occupational Safety and Health (NIOSH), USA. Results showed chloroform absence, and only some samples indicated carbon tetrachloride traces, but in 76.7% of the samples benzene was found and in 100% of the samples toluene was detected, these substances were in similar concentrations to those found, respectively, in the foreign literature. Qualitatively, the same substances, as mentioned to be in other countries' acclimatized indoor environments, were also found. As a conclusion, the existence of VOC, potentially harmful for the health, was observed in the air of acclimatized environments, even though without tobacco smoking. The methodology adapted to take the samples, and perform the analyses, proved to be a viable, and reliable alternative if compared to those existing in the technical literature. It was also found out that most part of the VOC present in the air of the investigated offices had outside air as a source, and SPL1T, and window-type air conditioners concentrate these substances in the indoor air, while central air conditioners provide dilution of these substances.
 
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Publishing Date
2021-07-12
 
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