Compostos carbonílicos atmosféricos: fontes, reatividade, níveis de concentração e efeitos toxicológicos

Andrade, Marta Valéria Almeida Santana de; Pinheiro, Heloísa Lúcia C.; Pereira, Pedro Afonso de Paula; Andrade, Jaílson Bittencourt de

doi:10.1590/s0100-40422002000700013

Cited by 68 publications

(79 citation statements)

References 47 publications

(80 reference statements)

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“…Concentrations of the higher aldehydes were generally very low and in most of the samples were under the limit of detection. Formaldehyde and acetaldehyde concentrations determined in this work are in the same range as those published previously for downtown Rio de Janeiro and other Brazilian cities, 19 in addition to other recent nonpublished results obtained by our laboratory for these areas. This was an expected result since in a recent emission inventory for the metropolitan area of Rio de Janeiro, the contribution of the airport to VOC emissions was estimated as 0.3% of fixed sources and 0.04% of mobile sources.…”

Section: Resultssupporting

confidence: 89%

“…In Brazil, the acetaldehyde/formaldehyde ratios determined in urban areas are generally high due to the use of ethanolcontaining fuels. 19 In 2001, Montero et al 11 reported ratios in the range 1.0-2.0 (mass). Similar values were reported for a commercial mall parking lot and a business building parking lot, which may be considered a light duty vehicle signature.…”

Section: Resultsmentioning

confidence: 99%

“…Aldehydes are important constituents of atmospheric chemistry and their reactions have been discussed in detail. 19 They are emitted by anthropogenic sources as a result of incomplete combustion processes and evaporative losses, in addition to emission from trees and other vegetation. They are also formed in the atmosphere from photochemical degradation of other organic compounds.…”

Section: Resultsmentioning

confidence: 99%

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Formaldehyde and acetaldehyde concentrations in the idle and taxiway areas of an urban airport

Guimarães¹,

Varandas²,

Arbilla³

2010

J. Braz. Chem. Soc.

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A fim de determinar o impacto das emissões de aldeídos num aeroporto, sobre a qualidade do ar, foram determinadas as concentrações de acetaldeído e formaldeído nas áreas de pouso e decolagem do aeroporto nacional Santos-Dumont no Rio de Janeiro, Brazil. O aeroporto está localizado a aproximadamente 1 km do centro da cidade e, no ano de 2007, teve uma média de 70.000 pousos e decolagens. Foram coletadas 129 amostras no período de março a novembro de 2007. Para o formaldeído foram observadas concentrações no intervalo 2,6 a 10,3 µg m -3 e para o acetaldeído, no intervalo, 4,3 a 19,7 µg m -3 . Durante a manhã, as relações A/F (acetaldeído/ formaldeído, em unidades de massa) se encontraram no intervalo 0,7-1,0. Nos horários da tarde as concentrações de formaldeído foram menores e as de acetaldeído aumentaram. As concentrações de formaldeído e acetaldeído estão no mesmo intervalo que valores previamente obtidos para o centro da cidade e possivelmente não afetem a produção de ozônio a nível local.To estimate the impact of aldehyde emissions at an airport on the air quality, formaldehyde and acetaldehyde concentrations were measured in the idle and taxiway areas of the Santos-Dumont national airport in Rio de Janeiro. The airport is located about 1 km from downtown Rio de Janeiro and had an average of 70,000 landings and take-offs during 2007. A total of 129 samples were collected in the period from March to November 2007. Formaldehyde concentrations ranged from 2.6 to 10.3 µg m -3 , and acetaldehyde concentrations ranged from 4.3 to 19.7 µg m -3 . During the morning, A/F ratios (acetaldehyde/formaldehyde ratios, in mass units) were in the range 0.7-1.0. In the afternoon, formaldehyde concentrations were lower and acetaldehyde concentrations generally increased. Formaldehyde and acetaldehyde concentrations were in the same range than values previously published for downtown and may not affect ozone production in a local scale.Keywords: aircraft engine emissions, aldehydes, airport air quality IntroductionThe impact of aircraft emissions on air quality has been investigated in several recent studies. Perl et al. 1 estimated the emissions due to aircraft operations at a mid-sized French airport in 1987, 1990 and 1994 and suggested a perspective of future emissions under different scenarios. These results show that, currently, aircraft emissions may be considered negligible in comparison with those generated by surface transportation sources. However, in the long-term, aviation might be considered a growing air pollution problem.Literature data show that the critical stages for aircraft emissions are those when the aircraft is waiting on the ground (the taxi and idle phases). In these phases, aircraft engines do not operate at their optimum conditions and emit significant amounts of carbon monoxide and hydrocarbons. 2 Pison and Menut 2 presented a analysis modeling of the aircraft traffic emissions impact on the ozone concentrations over Paris. They used a volatile organic compound (VOC) speciation reported by the Europe...

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Formaldehyde and acetaldehyde concentrations in the idle and taxiway areas of an urban airport

Guimarães¹,

Varandas²,

Arbilla³

2010

J. Braz. Chem. Soc.

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“…Os compostos carbonílicos (CC) de baixa massa molar encontram-se bastante difundidos na natureza 1 e são absorvidos pelo organismo humano através da respiração 2,3 , por absorção cutânea ou pela ingestão de alimentos e bebidas 1,4,5 .…”

Section: Introductionunclassified

“…Essas propriedades são mais acentuadas nos CC, tais como aldeídos e cetonas de menor massa molar que possuem insaturação e substituintes halogenados 1 .…”

Section: Introductionunclassified

Efeito da presença e concentração de compostos carbonílicos na qualidade de vinhos

Azevedo¹,

Reis²,

Silva³

et al. 2007

Quím. Nova

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Electrochemical Study of 2,4‐Dinitrophenylhydrazine as Derivatization Reagent and Aldehydes at Carbon Glassy Electrode

et al. 2017

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A selective method based on derivatization with 2,4‐dinitrophenylhydrazine (DNPH) is described for the determination of several carbonyl compounds. The factors affecting the derivatization reaction of aldehyde and DNPH were investigated. The product of the derivatization reaction has been characterized by UV/Vis spectrophotometry, NMR, infrared spectroscopy and cyclic voltammetry. Then, an electrochemical study for the determination of aldehyde‐2.4‐dinitrophenylhydrazone was performed at glassy carbon electrode (GCE) using square wave voltammetry (SWV). After the optimization of experimental parameters, the limits of detection (at 3σ) obtained for all aldehyde‐2,4‐DNPH were varied from 15.82 to 78.39 μmol L−1 and relative standard deviations were between 1.8 and 4.5%. Finally, the proposed method was applied to determine the aldehydes concentration in drinking water and orange juice samples with satisfactory results.

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Compostos carbonílicos atmosféricos: fontes, reatividade, níveis de concentração e efeitos toxicológicos

Cited by 68 publications

References 47 publications

Formaldehyde and acetaldehyde concentrations in the idle and taxiway areas of an urban airport

Formaldehyde and acetaldehyde concentrations in the idle and taxiway areas of an urban airport

Efeito da presença e concentração de compostos carbonílicos na qualidade de vinhos

Electrochemical Study of 2,4‐Dinitrophenylhydrazine as Derivatization Reagent and Aldehydes at Carbon Glassy Electrode

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