The emission of BTEX compounds during movement of passenger car in accordance with the NEDC

Adamović, Dragan; Dorić, Jovan; Miloradov, Mirjana Vojinović; Adamović, Savka; Pap, Sabolč; Radonić, Jelena; Sekulić, Maja Turk

doi:10.1016/j.scitotenv.2018.05.142

Cited by 9 publications

(4 citation statements)

References 45 publications

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“…To test whether these estimates are reasonable, we consider the emission of BTEX from passenger vehicles. An average passenger car emits 200 mg BTEX per driven kilometer . Los Angeles is populated by around 4 million inhabitants .…”

Section: Resultsmentioning

confidence: 99%

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Impact of OA on the Temperature Dependence of PM 2.5 in the Los Angeles Basin

Nussbaumer

Cohen

2021

Environ. Sci. Technol.

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Air quality policy in the Los Angeles megacity is a guidepost for other megacities. Over the last 2 decades, the policy has substantially reduced aerosol (OA) concentrations and the frequency of high aerosol events in the region. During this time, the emissions contributing to, and the temperature associated with, high aerosol events have changed. Early in the record, aerosol concentrations responded to a variety of different sources. We show that emission control has been effective with a strong decrease in temperature-independent sources. As a result, the response of aerosol to temperature has become a dominant feature of high aerosol events in the basin. The organic fraction of the aerosol (OA) increases with the temperature approaching 35% at 40 °C. We describe a simple conceptual model of aerosol in Los Angeles, illustrating how benzene, toluene, ethylbenzene, and xylenes (BTEX) and isoprene, along with molecules for which these are plausible surrogates such as monoterpenes, are sufficient to explain the observed temperature dependence of PM 2.5.

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Section: Resultsmentioning

confidence: 99%

“…An average passenger car emits 200 mg BTEX per driven kilometer. 52 Los Angeles is populated by around 4 million inhabitants. 53 If 1 million inhabitants (some are children) drove 10 km/day, the overall emission would amount to m(BTEX) = no.…”

Section: Introductionmentioning

confidence: 99%

Impact of OA on the Temperature Dependence of PM 2.5 in the Los Angeles Basin

Nussbaumer

Cohen

2021

Environ. Sci. Technol.

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“…Despite their detrimental effects on human health, BTEX are one of the most commonly used chemicals in industries such as petroleum, solvent, paint, adhesives, rubber and pesticide (Abumaizar et al 1998 ; Atlas and Philp 2005 ; Fayemiwo et al 2017 ). As a matter of fact, the principal sources of BTEX pollution are the aforementioned industries supplemented with coal and biomass burning or the exhaust emissions in urban environments (Kelley et al 1997 ; Baltrenas et al 2011 ; Mitra and Roy 2011 ; Datta et al 2013 ; Prestes de Castro et al 2015 ; Adamović et al 2018 ; Zhang et al 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Development of a bacterial consortium from Variovorax paradoxus and Pseudomonas veronii isolates applicable in the removal of BTEX

et al. 2022

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In this study, we report on the development of a novel bacterial consortium, consisting of Variovorax paradoxus and Pseudomonas veronii isolates, applicable in the biodegradation of all six BTEX compounds (benzene, toluene, ethylbenzene, o-, m- and p-xylene) and the bioremediation of contaminated sites. The co-cultivability of the selected bacterial isolates was determined in nutrient-rich medium, as well as in BTEX amended mineral salts solution using Terminal Restriction Fragment Length Polymorphism (T-RFLP) and CFU determinations. BTEX biodegradation capacity of the two-strain consortium was assessed in mineral salts solution, where a series of BTEX depletions and supplementations occurred, as well as in a real, BTEX polluted environmental sample (contaminated groundwater) in the presence of the autochthonous bacterial community. The obtained results indicated that the developed bacterial consortium is very efficient in BTEX biodegradation. Under laboratory conditions, the acclimatized bacterial consortium completely degraded the BTEX mixture with a concentration as high as 20 mg l−1 in a mineral salt medium within a short span of 6 h. Close to in situ groundwater conditions (incubated at 15 °C under static conditions in the absence of light), groundwater microcosms containing the autochthonous bacterial community inoculated with the developed bacterial consortium showed more efficient toluene, o-, m-and p-xylene biodegradation capacity than microcosms containing solely the native microbial population originally found in the groundwater. In the inoculated microcosms, after 115 h of incubation the concentration (~ 1.7 mg l−1 each) of o-, m- and p-xylene decreased to zero, whereas in the non-inoculated microcosms the concentration of xylene isomers was still 0.2, 0.3 and 0.3 mg l−1, respectively. The allochthonous bioaugmentation of the contaminated groundwater with the obtained inoculant was successful and manifested in a better BTEX degradation rate. Our results suggest that the obtained bacterial consortium can be a new, stable and efficient bioremediation agent applicable in the synergistic elimination of BTEX compounds from contaminated sites.

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“…Aromatic compounds emitted from anthropogenic sources, such as motor vehicle exhaust and solvent evaporation, are common volatile organic compounds in the urban atmosphere [1][2][3]. Aromatics discharged into the atmosphere mainly chemically react with OH radicals and nitrogen oxides to generate semi-and non-volatile oxygen-containing and nitrogen-containing organic products, which lead to the formation of secondary organic aerosol (SOA) via self-condensation and the gas/particle partitioning process [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Studies on the Reaction Mechanism and Kinetics of Ethylbenzene-OH Adduct with O2 and NO2

et al. 2021

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The OH-initiated reaction of ethylbenzene results in major OH addition, and the formed ethylbenzene-OH adducts subsequently react with O2 and NO2, which determine the components of the oxidation products. In this study, nine possible reaction paths of the most stable ethylbenzene-OH adduct, EB-Ortho (2-ethyl-hydroxycyclohexadienyl radical intermediate), with O2 and NO2 were studied using density functional theory and conventional transition state theory. The calculated results showed that ethyl-phenol formed via hydrogen abstraction was the major product of the EB-Ortho reaction with O2 under atmospheric conditions. Peroxy radicals generated from O2 added to EB-Ortho could subsequently react with NO and O2 to produce 5-ethyl-6-oxo-2,4-hexadienal, furan, and ethyl-glyoxal, respectively. However, nitro-ethylbenzene formed from NO2 addition to EB-Ortho was the predominant product of the EB-Ortho reaction with NO2 at room temperature. The total calculated rate constant of the EB-Ortho reaction with O2 and NO2 was 9.57 × 10−16 and 1.78 × 10−11 cm3 molecule−1 s−1, respectively, approximately equivalent to the experimental rate constants of toluene-OH adduct reactions with O2 and NO2. This study might provide a useful theoretical basis for interpreting the oxygen-containing and nitrogen-containing organics in anthropogenic secondary organic aerosol particles.

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The emission of BTEX compounds during movement of passenger car in accordance with the NEDC

Cited by 9 publications

References 45 publications

Impact of OA on the Temperature Dependence of PM 2.5 in the Los Angeles Basin

Impact of OA on the Temperature Dependence of PM 2.5 in the Los Angeles Basin

Development of a bacterial consortium from Variovorax paradoxus and Pseudomonas veronii isolates applicable in the removal of BTEX

Theoretical Studies on the Reaction Mechanism and Kinetics of Ethylbenzene-OH Adduct with O2 and NO2

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