Understanding Ozone Concentrations During Weekdays and Weekends in the Urban Area of the City of Rio de Janeiro

Martins, Eduardo Monteiro; Nunes, Anna C. L.; Corrêa, Sérgio Machado

doi:10.5935/0103-5053.20150175

Cited by 20 publications

(21 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless, the concentrations are of the same order of magnitude as those determined at other locations in Rio de Janeiro, Brazil, and in other countries with developed or emerging economies and lower than typical values for some industrial and urban areas of developing countries in Asia (Chan et al, 2002). They are also in agreement with the results recently reported by Martins et al (2015) using the same method. A benzene/ toluene ratio of around 0.5 (w/w) has been reported as characteristic of vehicular emissions (Duan et al, 2008).…”

Section: Concentrationssupporting

confidence: 82%

“…Except for Maracanã, the studied locations are in the south area of the city characterized by a higher standard of living and a better air quality. As shown in Table II, Martins et al (2015) determined a mean benzene concentration of 7.9 mg m -3 in several streets of the north area of the city, indicating a severe air quality deterioration and risk for visitors and permanent residents.…”

Section: Concentrationsmentioning

confidence: 99%

See 1 more Smart Citation

Isoprene, benzene and toluene levels at the major landmarks of Rio de Janeiro during the 2014 FIFA World Cup

Souza

Oliveira

Arbilla

2016

ATM

View full text Add to dashboard Cite

RESUMENSe recolectaron muestras de aire en los días anteriores al Campeonato Mundial de Futbol FIFA 2014 y durante la celebración de éste, en los principales puntos turísticos de Río de Janeiro, Brasil. Las muestras fueron recolectadas y analizadas siguiendo el método TO-15 de la US-EPA. El isopreno fue seleccionado como indicador de las emisiones biogénicas, y el benceno y el tolueno como indicadores de las emisiones vehiculares primarias. Se encontraron concentraciones de isopreno, benceno y tolueno en los intervalos 0.39 a 2.32 µg m , respectivamente. También se calcularon las reactividades cinéticas y mecánicas de estos compuestos para estimar su contribución a la formación de oxidantes atmosféricos. Las concentraciones de benceno y tolueno muestran que las emisiones urbanas impactan de manera considerable las áreas verdes de la ciudad. Los niveles de isopreno son similares a los encontrados previamente en otras regiones con vegetación. ABSTRACTAir samples were collected in the days before and during the 2014 FIFA World Cup at the major landmarks of Rio de Janeiro, Brazil. Samples were collected and analysed following Method TO-15 (US-EPA). Isoprene was selected as a marker of biogenic emissions, and benzene and toluene were selected as markers of anthropogenic emissions, primarily vehicular emissions. The isoprene, benzene, and toluene concentrations ranged from 0.39 to 2.32 µg m -3 , 2.27 to 10.16 µg m , respectively. The kinetic and mechanistic reactivities of these compounds were also calculated to estimate the actual contribution of these compounds to atmospheric oxidant formation. The benzene and toluene concentrations indicated that greener areas of the city are strongly affected by urban emissions. Levels of isoprene were similar to those previously determined in other areas with vegetation.

show abstract

Section: Concentrationssupporting

confidence: 82%

Section: Concentrationsmentioning

confidence: 99%

Isoprene, benzene and toluene levels at the major landmarks of Rio de Janeiro during the 2014 FIFA World Cup

Souza

Oliveira

Arbilla

2016

ATM

View full text Add to dashboard Cite

show abstract

“…NO 2 + OH → HNO 3 (5) The "weekend effect" in urban areas has been reported in several locations, e.g., Arizona [15], California [16], Chile [5], Ecuador [17], Mexico City [18], Rio de Janeiro [19], São Paulo [9], India [20] Shanghai [21], Guangzhou [22], Europe [23], and Cairo [24].…”

Section: Introductionmentioning

confidence: 99%

Ground Level Ozone Formation Near a Traffic Intersection: Lisbon “Rotunda De Entrecampos” Case Study

et al. 2020

View full text Add to dashboard Cite

Ground-level ozone in cities is increasing mainly due to traffic exhaust aftertreatment devices, i.e., tailpipe catalytic converters. The chemical reaction of O3 formation indicates radiation and nitrogen oxides as main players. Thus, we investigate correlations between O3, global radiation, nitrogen oxides, temperature, and precipitation in several periods of the year (2017) near a traffic roundabout in Lisbon city (coordinates 38°44’55’’ lat, −9°08’56’’ long). The weekend effect, school break versus school period, day and night, and seasonal effect were explored. Low-cost sensors (LCS) of O3, NOx, and temperature were tested to see if they can be used to get historical data on other cities and locations. The main innovation is the calibration of the sensor directly with real data (uncontrolled environment). Raw data were compared and led us to conclude that MQ-131 has a better performance than the MICS-4514 sensor. The results indicate that the diurnal cycle of ozone concentration has a mid-day peak around 1–2 pm and a lower nighttime concentration below 5 ppb Weekends and school break period (251 days a year) have the highest values of Ozone, this is due to lower NOx emissions and thus lower levels of ozone destruction reaction (NOx-titration reaction). August is a hotspot month with a maximum concentration of 71 ppb.

show abstract

“…Este modelo, mesmo que relativamente simples em comparação com modelos 3D, permite o entendimento de diversos processos cinéticos na atmosfera e tem sido usado em estudo de reatividade, [22][23][24][25] determinação de conjunto mínimo de COVs representativos, 26 estudo de episódios de poluição, 27,28 e elaboração de estratégias de controle da qualidade do ar. 29 Com o aumento no número de veículos e a formulação de novos combustíveis, o modelo pode ser utilizado para analisar o impacto dessas mudanças.…”

Section: Modelo Oziprunclassified

Urbanization and the Challenges in the Characterization of Air Quality

Silva

Arbilla

2018

Rev. Virtual Quim.

View full text Add to dashboard Cite

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.

show abstract

Understanding Ozone Concentrations During Weekdays and Weekends in the Urban Area of the City of Rio de Janeiro

Cited by 20 publications

References 3 publications

Isoprene, benzene and toluene levels at the major landmarks of Rio de Janeiro during the 2014 FIFA World Cup

Isoprene, benzene and toluene levels at the major landmarks of Rio de Janeiro during the 2014 FIFA World Cup

Ground Level Ozone Formation Near a Traffic Intersection: Lisbon “Rotunda De Entrecampos” Case Study

Urbanization and the Challenges in the Characterization of Air Quality

Contact Info

Product

Resources

About