| Title: | Volatile organic compounds speciation and their influence on ozone formation potential in an industrialized urban area in Brazil |
| Author(s): | Galvao ES; Santos JM; Reis Junior NC; Stuetz RM; |
| Address: | "a Departamento de Engenharia Ambiental , Universidade Federal do Espirito Santo , Vitoria , ES , Brazil. b School of Civil and Environmental Engineering , The University of New South Wales , Sydney , NSW , Australia" |
| DOI: | 10.1080/09593330.2016.1142001 |
| ISSN/ISBN: | 1479-487X (Electronic) 0959-3330 (Linking) |
| Abstract: | "Speciation and the influence on the ozone formation potential (OFP) from volatile organic compounds (VOCs) have been studied between February June 2013 in Vitoria, ES, Brazil. Passive samplers were installed at three air-quality monitoring stations and a total of 96 samplings were collected. A total of 78 VOCs were characterized by gas chromatograph-mass spectrometer. The predominant group was organic acids, followed by alcohols and substituted aromatics and 14 precursor species were quantified. An analysis correlating concentrations with wind direction was conducted to identify possible sources. The OFP was calculated applying the scale of maximum incremental reactivity proposed by Carter.[ 23 ] Ozone precursors with the greatest OFP such as undecane, toluene, ethylbenzene and m, p-xylene compounds were the most abundant with means of 0.855, 0.365, 0.259 and 0.289 microg m(-3), respectively. The benzene, toluene, ethylbenzene and xylene (BTEX) group was found below the limits considered harmful to the health of the population living in Vitoria. The OFP calculated for the precursors group was 22.55 microg m(-3) for the rainy season and 32.11 microg m(-3) for the dry season. The VOC/NOx ratio in Vitoria is approximately 1.71, indicating that the region has a VOC-limiting condition for the production of ozone" |
| Keywords: | Air Pollutants/*analysis/chemistry Brazil Cities Environmental Monitoring/*methods Ozone/*chemistry Volatile Organic Compounds/*analysis/chemistry Ozone formation potential (OFP) maximum incremental reactivity (MIR) scale nitrogen oxides (NOx) volatile or; |
| Notes: | "MedlineGalvao, Elson Silva Santos, Jane Meri Reis Junior, Neyval Costa Stuetz, Richard Michael eng England 2016/01/19 Environ Technol. 2016 Sep; 37(17):2133-48. doi: 10.1080/09593330.2016.1142001. Epub 2016 Mar 10" |
