Speciation Analysis of Ozone Precursor Volatile Organic Compounds in the Air Basins of the Rio de Janeiro Metropolitan Area

Arbilla, Graciela

doi:10.21577/1984-6835.20170111

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…The MRRJ has been described in a previous study (Silva et al, 2017). More than 35% of the MRRJ is covered by the Atlantic rain forest (both primary and secondary forests), including the Pedra Branca and Gericinó-Mendanha parks, which form a natural boundary that separates the west district from the rest of the city.…”

Section: Materials and Methods The City And The Metropolitan Region O...mentioning

confidence: 98%

Using mobile air quality station data to identify critical areas in the city of Rio de Janeiro regarding pollutant concentrations

Rodrigues,

Dantas,

Siciliano

et al. 2023

Rev. Bras. Ciênc. Ambient.

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Recent studies have shown that tropospheric ozone, fine particulate matter and nitrogen dioxide are the urban air pollutants of major concern regarding human health effects. Monitoring air quality is a challenge in several cities, such as Rio de Janeiro, where the number of fixed-site air quality monitoring stations and their spatial distribution are insufficient to assess the extent of atmospheric pollutants. However, despite this lack of resources, the data obtained by mobile stations are a valuable means of determining which areas are experiencing critical air quality conditions, and provide key information for an air quality management program. The main purpose of this study was to conduct a critical analysis of data obtained by the Municipal Department of Environment and Climate (SMAC) mobile station in the period 2010–2018. Concentrations determined for particulate matter with a diameter ≤2.5 µm (PM2.5), O3, NO2, SO2 and CO showed that PM2.5 and O3 are the pollutants of major concern, and that the north of the city has higher air quality indices for these compounds. In addition, the south-west district had relatively high ozone levels, probably owing to low concentrations of NO2 in a volatile organic compound (VOC)-limited ozone formation regime. These factors should be considered by the municipal government in future discussions of control strategies for managing the city’s air quality. This study also shows the value of mobile stations in making a preliminary survey of pollutant concentrations, mainly in countries with limited financial investment in air quality management.

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Section: Materials and Methods The City And The Metropolitan Region O...mentioning

confidence: 98%

Using mobile air quality station data to identify critical areas in the city of Rio de Janeiro regarding pollutant concentrations

Rodrigues,

Dantas,

Siciliano

et al. 2023

Rev. Bras. Ciênc. Ambient.

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“…A determinação e especiação dos COVs, mesmo não sendo legislados, se torna essencial para a compreensão dos processos de formação e consumo de ozônio. 9 Da mesma forma, medidas para o controle das concentrações de ozônio envolvem o controle de seus precursores, COVs e NOx. Para melhorar o conhecimento dos processos na atmosfera, entender de que forma as concentrações de COVs e NOx influenciam os níveis de ozônio e, especialmente, para fornecer informações que possam auxiliar na tomada de decisões sobre estratégias de controle ambiental, foram desenvolvidos modelos de qualidade do ar.…”

Section: Introductionunclassified

Urbanization and the Challenges in the Characterization of Air Quality

Silva

Arbilla

2018

Rev. Virtual Quim.

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The increase in urbanization, as well as the changes in consumption patterns, lead to an increase in the use of resources, waste generation, water pollution and a degradation in air quality since the 20 th century. Air Quality monitoring and control have become a huge challenge, mainly in major cities. The physical and chemical processes in urban atmosphere are very complex and include ozone and other secondary pollutants formation. The relation between primary pollutants and ozone concentrations are nonlinear and depends on very complex chemical mechanisms and the atmospheric conditions, mainly temperature and solar radiation. In this work the most used methods for the determination of volatile organic compounds, which are ozone precursors and are not determined by automatic monitoring stations, it is also presented as well as an air quality model of simple implementation. Using the trajectory model OZIPR (Ozone Isopleth Package for Research), from US Environmental Protection Agency, together with SAPRC mechanism (Air Pollution Research Center), the ozone isopleths, curves with the maximum ozone concentrations, can be calculated for different initial concentrations of volatile organic compounds (VOCs) and nitrogen oxides (NOx = NO + NO2). From the obtained results it is possible to infer the main characteristics of ozone forming processes in urban ambient. The results also show the importance of obtaining all the meteorological and concentrations parameters, mainly CO, NO, NO2 and O3, in a monitoring station as well as the concentration and VOCs speciation's in order to understand and explain ozone levels.

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“…The X/B ratios obtained were 0.94 and 1.19 for BTP and UFABC, respectively, suggesting the influence of aged air mass (Kumar et al, 2018). These values were lower than those observed in a previous study for the PIC area (X/B: 2.5, for samples of twodays, Boian et al, 2015), at an urban traffic site in the MASP (X/B: 2.53, Alvim et al, 2017) and industrial sites at Canada, Japan, Texas and urban/ industrial area of Rio de Janeiro, Brazil (X/B: 1.28, 1.56, 1.67 and 1.69, respectively (Miller et al, 2011;Tiwari et al, 2010;Leuchner and Rappenglück, 2010;Silva et al, 2017). The lower X/B observed in our study can be explained by the higher mixing ratios of benzene in relation to m+p-xylene, mainly at the BTP site.…”

Section: Ratios and Correlation Between Btex Speciesmentioning

confidence: 84%

“….................................... 46 Figure 2.10. Comparison of relative BTEX mass contributions (%) observed in industrial and urban areas: Rio de Janeiro, Brazil(Silva et al, 2017), Dunquerke, France(Roukos et al, 2009), Lanzhou, China(Jia et al, 2016), Texas, United States(Leuchner and Rappenglück, 2010), Ulsan, Korea(Kim et al, 2019), Windsor, Canada(Miller et al, 2011), Yokohama, Japan(Tiwari et al, 2010). *Present study represents the averaged concentrations for both sampling sites.…”

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confidence: 99%

Reactive hydrocarbons (C6-C11) in the Metropolitan Area of São Paulo

Coelho

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Os compostos orgânicos voláteis (COVs) são fundamentais nas reações atmosféricas, produzindo ozônio troposférico (O3) e aerossóis orgânicos secundários (SOA). Dentre os COVs, destacam-se os hidrocarbonetos (HCs), incluindo os compostos aromáticos (ex. (BTEX: benzeno, tolueno, etilbenzeno, m,p-e o-xilenos) sendo emitido diretamente na atmosfera, em áreas urbanas, por escapamentos de veículos, evaporação de combustível, uso de solventes, emissões de gás natural e processos industriais. São Paulo é o estado brasileiro com maior ocupação territorial e mais de 47 milhões de habitantes, somado ao maior desenvolvimento econômico e à maior frota automotiva, causando degradação da qualidade do ar. Na região metropolitana de São Paulo (RMSP), em particular, a frota de mais de 7 milhões de veículos tem sido reconhecida como a principal causa de eventos de poluição do ar, mas problemas de saúde e queixas da população do entorno de um importante complexo industrial e petroquímico do MASP também receberam atenção. Nesse contexto, o presente estudo avaliou os HCs próximos ao Complexo Petroquímico de Capuava (CPC) na RMSP, no período de 2016 a 2022. Na primeira etapa foram analisados dados de diferentes HCs com base em amostragens horárias em dois locais diferentes durante, 2016-2017. Na segunda parte do estudo foram analisadas as emissões descontroladas de material particulado (PM) e COVs, que ocorreu entre abril e maio de 2021 no CPC, com base nos dados da estação de qualidade do ar de Capuava (CETESB) e aplicando o modelo de pluma gaussiana -AERMOD (steady-state plume model), estimamos as concentrações de COV e PM10. Finalmente, uma análise dos dados horários de benzeno e tolueno foi fornecida, para seis estações de qualidade do ar (Capuava,

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Speciation Analysis of Ozone Precursor Volatile Organic Compounds in the Air Basins of the Rio de Janeiro Metropolitan Area

Cited by 6 publications

References 6 publications

Using mobile air quality station data to identify critical areas in the city of Rio de Janeiro regarding pollutant concentrations

Using mobile air quality station data to identify critical areas in the city of Rio de Janeiro regarding pollutant concentrations

Urbanization and the Challenges in the Characterization of Air Quality

Reactive hydrocarbons (C6-C11) in the Metropolitan Area of São Paulo

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