@Article{AlvimGCCSRPRFPN:2018:DeVORe,
author = "Alvim, D{\'e}bora Souza and Gatti, Luciana Vanni and Corr{\^e}a,
Sergio Machado and Chiquetto, J{\'u}lio Barboza and Santos,
Guaciara Macedo and Rossatti, Carlos de Souza and Pretto,
Ang{\'e}lica and Rozante, Jos{\'e} Roberto and Figueroa Rivero,
Silvio Nilo and Pendharkar, Jayant and Nobre, Paulo",
affiliation = "{Universidade Federal do ABC (UFABC)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Estadual do Rio de
Janeiro (UERJ)} and {Universidade de S{\~a}o Paulo (USP)} and
{University of California} and {Instituto de Pesquisas
Energ{\'e}ticas e Nucleares (IPEN)} and {Instituto de Pesquisas
Energ{\'e}ticas e Nucleares (IPEN)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Determining VOCs Reactivity for Ozone Forming Potential in the
Megacity of Sao Paulo",
journal = "Aerosol and Air Quality Research",
year = "2018",
volume = "18",
number = "9",
pages = "2460--2474",
month = "Sept.",
keywords = "Ozone-forming potential, Air quality, VOCs, Incremental
reactivity.",
abstract = "High ozone (O-3) concentrations are a major concern about air
quality in the Sao Paulo Metropolitan Area (SPMA). During 2016,
the 8-hour state standard of 140 mu g m(-3) was exceeded on 32
days, whereas the 1-hour national standard of 160 mu g m(-3) was
exceeded on 76 days. Exposure to such unhealthy O-3 levels and
other pollutants can lead to respiratory disease. The focus of
this study is to determine the main O-3 precursor in terms of the
volatile organic compounds (VOCs) in order to provide a scientific
basis for controlling this pollutant. In this work, 66 samples of
hydrocarbons, 62 of aldehydes and 42 of ethanol were taken during
the period from September 2011 to August 2012 from 7:00 to 9:00
a.m. The OZIPR trajectory model and SAPRC atmospheric chemical
mechanism were used to determine the major O-3 precursors. During
the studied period, aldehydes represented 35.3% of the VOCs,
followed by ethanol (22.6%), aromatic compounds (15.7%), alkanes
(13.5%), ketones (6.8%), alkenes (6.0%) and alkadienes (less than
0.1%). Considering the concentration of VOCs and their typical
reactivity, the simulation results showed that acetaldehyde
contributed 61.2% of the O-3 formation. The total aldehydes
contributed 74%, followed by aromatics (14.5%), alkenes (10.2%),
alkanes (1.3%) and alkadienes (e.g., isoprene; 0.03%). Simulation
results for the SPMA showed that the most effective alternative
for limiting the O-3 levels was reducing the VOC emissions, mainly
the aldehydes.",
doi = "10.4209/aaqr.2017.10.0361",
url = "http://dx.doi.org/10.4209/aaqr.2017.10.0361",
issn = "1680-8584",
language = "en",
targetfile = "alvim_determining.pdf",
urlaccessdate = "27 abr. 2024"
}