Volatile organic compound emissions from a landfill, plume dispersion and the tropospheric ozone modeling

Corrêa, Sérgio Machado; Souza, Carolina Vieira De; Sodré, Eduardo Delfino; Teixeira, Jorgina Rosete

doi:10.1590/s0103-50532012000300017

Cited by 13 publications

(12 citation statements)

References 11 publications

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“…Benzene concentrations were close to those found in different studies [30], [35], except for samples collected in landfill areas [1], [36]. The highest BTEX concentrations at the landfill area exceeded the maximum value obtained in the three workshops.…”

Section: Resultssupporting

confidence: 85%

Btex in an occupational environment

Martins¹,

Borba²,

Santos³

et al. 2019

Int. J. EI

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The BTEX group (benzene, toluene, ethyl benzene and xylene) are known for their potential toxic, mutagenic and carcinogenic effects, especially in an indoor occupational environment, where these substances dissipate with greater difficulty. Thus, the present work evaluated the concentrations, mutagenicity and cytotoxicity of the BTEX group in the indoor air of workshops involving painting and varnishing. Samples were collected using air pumps from the outside of the open environment workshops and from the inside of each of the three workshops. The chemical analyses were carried out using gas chromatograph with mass spectrometry. The mutagenic and cytotoxicity potentials were determined using the Salmonella/microsome and WST/LDH assays, respectively. The concentrations of each constituent of the BTEX group were below the limits established by the National Institute for Occupational Safety and Health and toluene presented the highest value. Moreover, these compounds did not induce mutagenic activity in the TA98 and TA100 Salmonella typhimurium strains either in the presence or in the absence of metabolization, and no cytotoxic effects were observed in the A549 human lung cells. These results may be related to the low BTEX values found in the occupational environment, as can be seen in some other studies. Nevertheless, at low concentrations, these compounds may cause toxicity by a pathway not investigated in this study or may have interacted with other non-monitored air constituents, reducing their toxicity. The present study sought to obtain more information and clarifications regarding occupational exposure to BTEX, contributing to the risk assessment of the workers exposed to these substances.

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Section: Resultssupporting

confidence: 85%

Btex in an occupational environment

Martins¹,

Borba²,

Santos³

et al. 2019

Int. J. EI

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“…5,14 Other publications by our group detail its applicability. 3,15 OZIPR allows for simulating chemical and physical processes that occur in urban troposphere using a trajectory model. This model can be understood as a column of air at the base that encompasses the entire studied region, just up to the atmosphere mixing layer, similar to a box with a movable cover, which is a function of the mixture layer height throughout the day.…”

Section: Modeling Proceduresmentioning

confidence: 99%

Measurements of emissions from motorcycles and modeling its impact on air quality

Garcia¹,

Corrêa²,

Penteado³

et al. 2013

J. Braz. Chem. Soc.

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The increase in the number of motorcycles in large Brazilian cities is due to several factors such as traffic, low cost, mobility, few parking lots and the low efficiency of public transportation, becoming an important factor in air quality deterioration. In this context, vehicle emissions monitoring is essential to understand the contribution to air pollution as a whole. In this scenario, the emissions were sampled on a motorcycle dynamometer test bench and analyzed by gas chromatography and on-line analyzers according to the EC/97/24 standard (European Commission). Emissions from motorcycles using commercial gasoline (with 22% of ethanol) were used in combination with meteorological data and ambient air pollutants for Rio de Janeiro City (Brazil) during the Winter of 2011, using the trajectory model OZIPR (Ozone Isopleth Package for Research) and the chemical model SAPRC99 (State-wide Air Pollution Research Centre) to assess the impact on the ozone formation in the troposphere of Rio de Janeiro for the next several years. The results indicate that ozone levels will exceed the established limits by national legislation within three years. The study also showed that pollutant emission rates stay in agreement with emissions recommended by the Brazilian legislation for all phases. The increase in ozone concentration occurs due to high emissions of reactive volatile organic compounds in an atmosphere with high levels of nitrogen oxides (NOx). Given this scenario, additional measures are necessary to manage emissions from mobile sources in the future.

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“…Other publications by our group detail its applicability [11,12]. In summary, the input data for a simulation are the following:  Speciation of VOC of the local atmosphere in ppmC fractions.…”

Section: Model Developmentmentioning

confidence: 99%

Impact of motorcycles on urban tropospheric ozone

Garcia

Corrêa

Penteado

et al. 2013

WIT Transactions on Ecology and the Environment

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The increased number of motorcycles in the large Brazilian cities is due to several factors such as traffic, low cost, mobility, few parking lots and low efficiency of public transportation, making it an important factor in air quality deterioration. In this context, vehicle emissions monitoring is essential to understanding the contribution on air pollution. Emissions of two representative motorcycles using gasohol (gasoline with 22% of ethanol) were evaluated on a dynamometer test bench and analyzed by gas chromatography mass spectrometry and on-line analyzers according to the EC/97/24 standard. Emission data obtained in combination with meteorological data and ambient air pollutants for the city of Rio de Janeiro (Brazil) during the winter of 2011, using the trajectory model OZIPR and chemical model SAPRC to assess the impact on the ozone forming potential in the troposphere of Rio de Janeiro city for the next years. The results indicate that ozone levels will exceed the established limits by national legislation within three years. The increase in ozone concentration occurs due to high emissions of reactive volatile organic compounds in an atmosphere with high levels of nitrogen oxides. Given this scenario, additional measures are necessary for the management of emissions from mobile sources.

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Volatile organic compound emissions from a landfill, plume dispersion and the tropospheric ozone modeling

Cited by 13 publications

References 11 publications

Btex in an occupational environment

Btex in an occupational environment

Measurements of emissions from motorcycles and modeling its impact on air quality

Impact of motorcycles on urban tropospheric ozone

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