The environmental aspects of the evaporation of BTEX from gasoline with and without ethanol

Fedrizzi, Franciele; Cagliari, Jóice; Teixeira, Cláudia Echevenguá; Finotti, Alexandra Rodrigues; Filho, Irajá do Nascimento

doi:10.1504/ijewm.2013.051820

Cited by 5 publications

(6 citation statements)

References 15 publications

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“…Maleic acid and citraconic acid both correlate strongly with each other ( r = 0.93) and moderately with their trans -isomers, fumaric acid [ r (maleic) = 0.68, r (citraconic) = 0.66] and mesaconic acid [ r (maleic) = 0.56, r (citraconic) = 0.56], indicating that the acids originate from similar sources or were formed through similar processes. Maleic acid, the main representative of the four acids, can originate from the oxidation of aromatic compounds such as benzene, xylene, or toluene. − Those volatile organic compounds (VOCs) can be emitted from numerous sources, such as the evaporation of solvents or gasoline, , the combustion of coal, , and the exhaust of motor vehicles . Although maleic acid is mainly related to vehicular exhaust, during field campaigns, the contribution of sources to the measured concentrations depends mainly on the sampling location and the season.…”

Section: Resultsmentioning

confidence: 99%

“…Maleic acid, the main representative of the four acids, can originate from the oxidation of aromatic compounds such as benzene, xylene, or toluene. 68−70 Those volatile organic compounds (VOCs) can be emitted from numerous sources, such as the evaporation of solvents or gasoline, 71,72 the combustion of coal, 73,74 and the exhaust of motor vehicles. 75 Although maleic acid is mainly related to vehicular exhaust, 15 during field campaigns, the contribution of sources to the measured concentrations depends mainly on the sampling location and the season.…”

Section: Overview Of Organic Constituent Concentrations At Mountmentioning

confidence: 99%

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Origins of Particulate Organic Acids during High-Altitude Transport over the North China Plain: Results from Mount Tai and a Flight Campaign in Winter 2019

Kwiezinski,

van Pinxteren,

Hoffmann

et al. 2024

ACS Earth Space Chem.

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Measurements of atmospheric organic particle composition at higher altitudes are scarce. The present study discusses concentrations and sources of PM and organic constituents based on winter-time observations at Mount Tai and aircraft measurements above the North China Plain (NCP). For PM 2.5 at the mountain site, concentrations up to 94 μg m −3 were measured. Correlations with surrounding cities indicated that, despite an observed boundary layer height below the sampling altitude (1534 m asl), polluted air masses from the plain ascended to the mountaintop, possibly due to orographic effects. Organic constituents showed mean concentrations ranging from ∼1 ng m −3 for terpene-derived acids and some branched or unsaturated dicarboxylic acids but could reach up to ∼100 ng m −3 for oxalic acid. A cluster heatmap revealed correlational relationships between the compounds that originate from sources, including traffic, combustion of coal, waste, and biomass as well as secondary formation. Average concentrations of most short-chain organic acids taken in the general upwind direction of Mount Tai at mean flight altitudes of ∼4000 m averaged 10−25% of the mountain ones outside haze periods, suggesting that chemical formation during high-altitude transport could have occurred. One flight sample showed high concentrations of up to 180 ng m −3 for oxalic acid, which is comparable to mountain haze periods, corroborating earlier observations of elevated pollution layers in the area even at such altitudes. CAPRAM multiphase modeling reproduced selected mountain concentrations of malonic and succinic acids reasonably well, while an initial underestimation of oxalic acid could be reduced by including salt formation and thereby enhanced phase partitioning. Overall, this study addresses observational gaps at high altitudes over the NCP and suggests processes and sources that might also be relevant in other regions.

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Section: Resultsmentioning

confidence: 99%

Section: Overview Of Organic Constituent Concentrations At Mountmentioning

confidence: 99%

Origins of Particulate Organic Acids during High-Altitude Transport over the North China Plain: Results from Mount Tai and a Flight Campaign in Winter 2019

Kwiezinski,

van Pinxteren,

Hoffmann

et al. 2024

ACS Earth Space Chem.

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“…Os cálculos de degradação/inertização dos compostos de interesse foram baseados na comparação direta das áreas dos picos cromatográficos. [32][33][34] 3 RESULTADOS E DISCUSSÃO…”

Section: Ntroduçãounclassified

Gerenciamento de resíduos de glutaraldeído, xilenos e formaldeído em um hospital escola e em um laboratório universitário de anatomia

Manfredini

Filho

Schneider

2020

BJD

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“…The main advantages of the ethanol-blend fuels are the reduction of greenhouse gas emissions and the higher octane number of gasoline (Fedrizzi et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Despite the benefits provided by the mixture, the presence of ethanol in gasoline may affect the BTEX (benzene, toluene, ethylbenzene and xylenes) volatilization and these compounds may evaporate from spills of underground storage tanks or by accidental releases (Fedrizzi et al, 2013). The gas transport through the vadose zone can be influenced by moisture content due to variations in gaseous permeability, phase partitioning and aerobic biodegradation (Nerantzis and Dyer, 2010).…”

Section: Introductionmentioning

confidence: 99%

Influence of Ethanol and Methyl Groups on the Degradation of Xylenes in Soil

Nascimento¹,

Baldasso²,

Manfredini³

2015

American Journal of Applied Sciences

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Abstract:The main objective of the present study was to assess the influence of ethanol on the evaporation profile of xylenes (ortho + meta and para isomers) in active (with microorganisms) and inert (without microorganisms) soils. The vapors from four sealed flasks containing inert soil + neat xylenes, active soil + neat xylenes, inert soil + xylenes + ethanol and active soil + xylenes + ethanol were monitored during 20 days by Gas Chromatography using a Flame Ionization Detector (GC/FID). No statistical differences were observed comparing the concentrations of the meta and para isomers in all samples. The differences among the average concentrations of meta, para and ortho isomers were relevant only in the active soil samples without ethanol (95% confidence interval). Ethanol may enhance the ortho isomer volatilization and delay the degradations of meta and para isomers.

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The environmental aspects of the evaporation of BTEX from gasoline with and without ethanol

Cited by 5 publications

References 15 publications

Origins of Particulate Organic Acids during High-Altitude Transport over the North China Plain: Results from Mount Tai and a Flight Campaign in Winter 2019

Origins of Particulate Organic Acids during High-Altitude Transport over the North China Plain: Results from Mount Tai and a Flight Campaign in Winter 2019

Gerenciamento de resíduos de glutaraldeído, xilenos e formaldeído em um hospital escola e em um laboratório universitário de anatomia

Influence of Ethanol and Methyl Groups on the Degradation of Xylenes in Soil

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