The winter effect on formation of PCDD/Fs in Guangzhou by vehicles: A tunnel study

Deng, Yunyun; Peng, Ping’an; Ren, Mingchun; Song, Jianzhong; Huang, Weilin

doi:10.1016/j.atmosenv.2011.02.022

Cited by 23 publications

(16 citation statements)

References 26 publications

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“…One possible cause of the higher benzene and toluene concentrations during winter relative to summer could have been the lower combustion efficiency of gasoline, causing higher VOC concentrations in the roadway air due to incomplete combustion. This assertion was supported by Deng et al (2011), who reported that high tailpipe emissions from motor vehicles are associated with cold ambient temperature. In addition, the highest amount of heating fuel is typically consumed in Korean urban areas during winter, which elevates the ambient air pollutant levels in these regions (Lee et al 2006).…”

Section: Long-term Temporal Variationsupporting

confidence: 71%

Spatial and long-term temporal assessment of organic hazardous air pollutants and their comparative health risks

Kim

2015

Int. J. Environ. Sci. Technol.

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This study investigated the spatial and longterm temporal characteristics of 13 selected organic hazardous air pollutants and the health risks associated with inhalation exposure over a recent 6-year period. Regional types selected for this study included a residential-commercial complex, traffic junction, petrochemical industry, iron and metal industry, and background areas in Korea. Toluene was generally the most abundant pollutants in all areas. The petrochemical industrial area had the highest median concentrations of six pollutants (benzene, ethyl benzene, o-xylene, m,p-xylene, styrene, and chloroform), followed by the residential-commercial complex, traffic junction, iron and metal industry, and background area. The residential-commercial complex and traffic junction areas showed the highest and second highest toluene concentrations, respectively. Two pollutants (1,1-dichloroethane and 1,3-butadiene) were present in similar concentrations among the five areas. In addition, the temporal trends in the annual mean concentrations exhibited unpredictable behavior depending on both the area and the type of pollutants. At the residential-commercial complex and traffic junction areas, six aromatic compounds showed significant correlations among themselves. In most cases, three important meteorological parameters (relative humidity, temperature, and wind speed) were not significantly

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Section: Long-term Temporal Variationsupporting

confidence: 71%

Spatial and long-term temporal assessment of organic hazardous air pollutants and their comparative health risks

Kim

2015

Int. J. Environ. Sci. Technol.

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“…However, due to the extensive use of furans in polymer chemistry and presence in the atmosphere of components of polymers, resins, etc., through the detection of various organic species, this chemical source may be the main source of furans. Several reports have mentioned that vehicle exhausts are also a source of polychlorinated dibenzofurans (PCDFs), particularly in tunnel air (Miyabara et al, 1999;Chang et al, 2004;Deng et al, 2011); in our study, no feature indicates the presence of these species.…”

Section: Chemical Characteristics Of Identified Organic Compoundscontrasting

confidence: 36%

Transverse approach between tunnel environment and corrosion: Particulate matter in the Grand Mare tunnel

Ameur-Boudabbous

Kasperek

Barbier

et al. 2014

Journal of the Air & Waste Management Association

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A tunnel-type semi-enclosed atmosphere is characterized by a higher particulate pollution than urban zones and highlights the particulate species having an impact on material degradation. Therefore, a transverse approach between air composition and its consequences upon longevity of materials is necessary, requiring a better knowledge of tunnel atmosphere and a better understanding of material degradation inside a tunnel for operating administration. The characterization of particulate matter collected inside a road tunnel in Rouen (France) allows us to set up the features of the particle characteristics of the real conditions of field exposure. Two sampling campaigns include analyses of organic and water-soluble ionic fractions. The current work shows that organic species, grouped into two sets derived primarily from engine exhaust and debris with wear particles resuspended by the traffic, are divided into two groups: a majority comprising n-alkanes, alkanoic acids, phthalates, ketones, and benzothiazole and a minority one composed of BTEX (benzene, toluene, ethylbenzene, and xylenes), polycyclic aromatic hydrocarbons (PAHs), fatty acid methyl esters (FAMEs), furans, phenols, and alkenes. As regards the water-soluble ionic fraction, the ionic species such as Cl, and Na þ are involved in the degradation process. The inorganic particles (insoluble and slightly soluble), debris and wear particles, organic acids, and relative humidity play a key role and are important factors to consider in the degradation process.Implications: Particles, together with relative humidity, can play an important role in the degradation of materials inside a road tunnel. Depth knowledge of the environment prevailing inside a tunnel improves the criteria for selection of materials of equipments contained therein. In the present study, it appears that the particulate mass can be divided into two groups with distinct effects: a water-soluble particle group is the source of ionic species involved in the degradation process, and a slightly water-soluble or insoluble particle group that acts as reservoir of condensed water when covering the surface of the material.

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“…A congener-specific factor analysis with 17 congeners was performed using SPSS software, and nine ambient air samples, nine soil samples, and three stack gas samples were selected as the variables. In addition, three gas samples of traffic emissions in Guangzhou, China (Deng et al, 2011) were taken as variables.…”

Section: Pcdd/fs Source Identificationmentioning

confidence: 99%

Concentrations and Profiles of Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans in Air and Soil Samples in the Proximity of a Municipal Solid Waste Incinerator Plant

Liu

Zhang

et al. 2012

Environmental Engineering Science

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This study investigated the influence of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) in the waste gas from an incinerator on the surrounding environment. A series of air and soil samples were collected at distances from 1.35 to 4.72 km from a typical municipal solid waste incineration plant along the prevailing north wind direction. Concentrations of PCDD/Fs in the ambient air samples ranged from 0.23 to 1.66 pg I-toxic equivalent (TEQ)/m 3 , with an average of 0.82 pg I-TEQ/m 3 ; while concentrations in the soil samples varied from 0.54 to 1.96 pg I-TEQ/g, with an average of 1.33 pg I-TEQ/g. Principal component analysis and hierarchical cluster analysis showed that the municipal solid waste incinerator has a potential influence on the environmental level of PCDD/Fs, and that emissions from traffic also play an important role.

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The winter effect on formation of PCDD/Fs in Guangzhou by vehicles: A tunnel study

Cited by 23 publications

References 26 publications

Spatial and long-term temporal assessment of organic hazardous air pollutants and their comparative health risks

Spatial and long-term temporal assessment of organic hazardous air pollutants and their comparative health risks

Transverse approach between tunnel environment and corrosion: Particulate matter in the Grand Mare tunnel

Concentrations and Profiles of Polychlorinated Dibenzo-p-Dioxins and Dibenzofurans in Air and Soil Samples in the Proximity of a Municipal Solid Waste Incinerator Plant

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