Revealing source signatures in ambient BTEX concentrations

Zalel, Amir; Yuval, .; Broday, David M.

doi:10.1016/j.envpol.2008.01.016

Cited by 90 publications

(33 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Observations in several locations (Filella et al, 2006;Zalel et al, 2008;Tiwary et al, 2010;Wagner and Kuttler, 2014) reported the highest levels of benzene and toluene being in the morning and evening hours due to the increase in the motor vehicle transport exhausts at this time. Contrary to these studies, no clear diurnal variation in benzene and toluene was observed in the TROICA-12 campaign (Fig.…”

Section: Diurnal Variations In Benzene and Toluenementioning

confidence: 99%

Benzene and toluene in the surface air of northern Eurasia from TROICA-12 campaign along the Trans-Siberian Railway

et al. 2017

View full text Add to dashboard Cite

Abstract. Volatile organic compounds (VOCs) were measured by proton transfer reaction mass spectrometry (PTR-MS) on a mobile laboratory in a transcontinental TROICA-12 (21 July-4 August 2008) campaign along the TransSiberian Railway from Moscow to Vladivostok. Surface concentrations of benzene (C 6 H 6 ) and toluene (C 7 H 8 ) along with non-methane hydrocarbons (NMHCs), CO, O 3 , SO 2 , NO, NO 2 and meteorology are analyzed in this study to identify the main sources of benzene and toluene along the TransSiberian Railway. The most measurements in the TROICA-12 campaign were conducted under low-wind/stagnant conditions in moderately (∼ 78 % of measurements) to weakly polluted (∼ 20 % of measurements) air directly affected by regional anthropogenic sources adjacent to the railway. Only 2 % of measurements were identified as characteristic of highly polluted urban atmosphere. Maximum values of benzene and toluene during the campaign reached 36.5 and 45.6 ppb, respectively, which is significantly less than their short-term exposure limits (94 and 159 ppb for benzene and toluene, respectively). About 90 % of benzene and 65 % of toluene content is attributed to motor vehicle transport and 10 and 20 %, respectively, provided by the other local-and regional-scale sources. The highest average concentrations of benzene and toluene are measured in the industrial regions of the European Russia (up to 0.3 and 0.4 ppb for benzene and toluene, respectively) and south Siberia (up to 0.2 and 0.4 ppb for benzene and toluene, respectively). Total contribution of benzene and toluene to photochemical ozone production along the Trans-Siberian Railway is about 16 % compared to the most abundant organic VOC -isoprene. This contribution, however, is found to be substantially higher (up to 60-70 %) in urbanized areas along the railway, suggesting an important role of anthropogenic pollutant sources in regional ozone photochemistry and air quality.

show abstract

Section: Diurnal Variations In Benzene and Toluenementioning

confidence: 99%

Benzene and toluene in the surface air of northern Eurasia from TROICA-12 campaign along the Trans-Siberian Railway

et al. 2017

View full text Add to dashboard Cite

show abstract

“…To provide examples to these reports; in Tokyo 1.3 and in Athens 4.8 be the most common ones range from 2.0 to 3.0 [34]. It is known that low X/E values are connected with active photochemical reactions [37,38].…”

Section: Spatial Distribution Patternmentioning

confidence: 99%

Spatial Distribution of BTEX and Inorganic Pollutants During Summer Season in Yalova, Turkey

Tecer

Tağil

Ulukaya³

et al. 2017

Ecological Chemistry and Engineering S

View full text Add to dashboard Cite

Abstract:The objective of this research is to determine the atmospheric concentrations and spatial distribution of benzene (B), toluene (T), ethylbenzene (E) and xylenes (X) (BTEX) and inorganic air pollutants (O3, NO2 and SO2) in the Yalova atmosphere during summer 2015. In this study, a combination of passive sampling and Geographical Information System-based geo-statistics are used with spatial statistics of autocorrelation to characterise the spatial pattern of the quality of air based on concentrations of these pollutants in Yalova. The spatial temporal variations of pollutants in the air with five types of land-use, residence, rural, highway, side road and industrial areas were investigated at 40 stations in Yalova between 7 th August 2015 and 26 th August 2015 using passive sampling. An inverse distance weighting interpolation technique was used to estimate variables at an unmeasured location from observed values at nearby locations. The spatial autocorrelation of air pollutants in the city was investigated using the statistical methods of Moran's I in addition to the Getis Ord Gi. During the summer, highway and industrial sites had higher levels of BTEX then rural areas. The average concentration of toluene was measured to be 5.83 µg/m 3 and this is the highest pollutant concentration. Average concentrations of NO2, O3 and SO2 are 35.64, 84.23 and 3.95 µg/m 3 , respectively. According to the global results of Moran's I; NO2 and BTEX had positive correlations on a global space at a significant rate. Moreover, the autocorrelation analysis on the local space demonstrated significant hot spots on industrial sites and along the main roads.

show abstract

“…Some of these occur naturally, but most air pollutants are derived from human activities (anthropogenic) and can significantly change or impact the earth's natural life processes (Bidleman, 2001). Volatile organic compounds (VOCs) such as benzene, toluene, ethylbenzene and xylenes constitute an important group of anthropogenic organic compounds from combustion (vehicles, aircraft and fossil fuel power plants), fuel storage and transport, solvent usage and production, industrial emissions, landfills and hazardous waste facilities (Zalel et al, 2008). Some VOCs are toxic (e.g.…”

Section: Introductionmentioning

confidence: 99%

Distribution of VOCs between air and snow at the Jungfraujoch high alpine research station, Switzerland, during CLACE 5 (winter 2006)

et al. 2009

View full text Add to dashboard Cite

Abstract. Volatile organic compounds (VOCs) were analyzed in air and snow samples at the Jungfraujoch high alpine research station in Switzerland as part of CLACE 5 (CLoud and Aerosol Characterization Experiment) during February/March 2006. The fluxes of individual compounds in ambient air were calculated from gas phase concentrations and wind speed. The highest concentrations and flux values were observed for the aromatic hydrocarbons benzene (14.3 µg.m −2 s −1 ), 1,3,5-trimethylbenzene (5.27 µg.m −2 s −1 ), toluene (4.40 µg.m −2 s −1 ), and the aliphatic hydrocarbons i-butane (7.87 µg.m −2 s −1 ), ipentane (3.61 µg.m −2 s −1 ) and n-butane (3.23 µg.m −2 s −1 ). The measured concentrations and fluxes were used to calculate the efficiency of removal of VOCs by snow, which is defined as difference between the initial and final concentration/flux values of compounds before and after wet deposition. The removal efficiency was calculated at −24 • C (−13.7 • C) and ranged from 37% (35%) for o-xylene to 93% (63%) for i-pentane. The distribution coefficients of VOCs between the air and snow phases were derived from published poly-parameter linear free energy relationship (pp-LFER) data, and compared with distribution coefficients obtained from the simultaneous measurements of VOC concentrations in air and snow at Jungfraujoch. The coefficients calculated from pp-LFER exceeded those values measured in the present study, which indicates more efficient snow scavenging of the VOCs investigated than suggested by theoretical predictions.Correspondence to: E. Starokozhev

show abstract

Revealing source signatures in ambient BTEX concentrations

Cited by 90 publications

References 24 publications

Benzene and toluene in the surface air of northern Eurasia from TROICA-12 campaign along the Trans-Siberian Railway

Benzene and toluene in the surface air of northern Eurasia from TROICA-12 campaign along the Trans-Siberian Railway

Spatial Distribution of BTEX and Inorganic Pollutants During Summer Season in Yalova, Turkey

Distribution of VOCs between air and snow at the Jungfraujoch high alpine research station, Switzerland, during CLACE 5 (winter 2006)

Contact Info

Product

Resources

About