Polycyclic aromatic hydrocarbons from diesel emissions exert proallergic effects in birch pollen allergic individuals through enhanced mediator release from basophils

2009 ◽  
pp. NA-NA ◽  
Author(s):  
Stefanie Lubitz ◽  
Wolfgang Schober ◽  
Gudrun Pusch ◽  
Renate Effner ◽  
Norman Klopp ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Birch Pollen ◽  
Diesel Emissions ◽  
Mediator Release ◽  
Polycyclic Aromatic

scholarly journals Determination of Particles and Carcinogenic Compounds Emitted by Combustion of Diesel and Diesel:Biodiesel Blends

Proceedings ◽  
2018 ◽  
Vol 2 (23) ◽  
pp. 1505
Author(s):  
Samantha Arteaga-Del Angel ◽  
Brenda L. Valle-Hernandez ◽  
Violeta Mugica-Alvarez
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Organic Compounds ◽  
Aromatic Hydrocarbons ◽  
Alternative Fuels ◽  
Raw Materials ◽  
Diesel Emissions ◽  
Ultrasound Assisted Extraction ◽  
Assisted Extraction ◽  
Polycyclic Aromatic

Among the main pollutants emitted into the atmosphere by diesel combustion are the particles. Most of the studies suggest that the greatest impact on health by the particles is caused by some of the organic compounds such as the polycyclic aromatic hydrocarbons, which are highly toxic and carcinogenic compounds. Some of the strategies that are being implemented to mitigate these harmful particles emissions are the use of alternative fuels, such as biodiesel. In this research, the characterization of six fuels (diesel and five biodiesel, obtained from different raw materials) was carried out. Diesel:Biodiesel blends were prepared at 5, 10 and 20% of biodiesel on proportion to the diesel (B5, B10 and B20). Additionally, B100 was analyzed for some biodiesels. The particles emitted by the combustion of the different fuels were sampled and their concentration was determined. The organic compounds were extracted from the particles by ultrasound-assisted extraction and subsequently the polycyclic aromatic hydrocarbons (PAHs) were determined by gas chromatography coupled to mass spectrometry (GC-MS). In this study, it was observed that the use of biodiesel decreases the emission of particle concentration, but it is not significant. In the case of the concentrations of carcinogenic compounds (PAHs), the B20 biodiesel blends emissions had a statistically significant reduction compared to diesel emissions.

scholarly journals PAH contents in road dust on principal roads collected nationwide in Japan and their influential factors

2015 ◽  
Vol 72 (7) ◽  
pp. 1062-1071 ◽  
Author(s):  
Noriatsu Ozaki ◽  
Yuma Akagi ◽  
Tomonori Kindaichi ◽  
Akiyoshi Ohashi
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Population Density ◽  
Aromatic Hydrocarbons ◽  
Pattern Analysis ◽  
Geometric Mean ◽  
Road Dust ◽  
Influential Factors ◽  
Diesel Emissions ◽  
Polycyclic Aromatic ◽  
Ignition Loss

Fifty-four road dust samples were collected from principal roads (n = 37) and residential roads (n = 17) nationwide in Japan from March 2010 to November 2012. Sixteen polycyclic aromatic hydrocarbons (PAHs) and ignition loss (IL) were determined. The total PAH contents ranged from 62 to 6,325 ng g−1 with a geometric mean of 484 ng g−1. The IL ranged from 0.8 to 17% with a mean of 6%. The PAH contents were correlated with the IL contents, and the IL contents were dependent on the population density. From the PAH pattern analysis, the PAHs from road dust are considered to be mainly from diesel emissions.

scholarly journals Industrial Source Contributions and Health Risk Assessment of Fine Particle-Bound Polycyclic Aromatic Hydrocarbons (PAHs) during Spring and Late Summer in the Baoshan Area, Shanghai

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 2016
Author(s):  
Weiqian Wang ◽  
Qingyue Wang ◽  
Daisuke Nakajima ◽  
Senlin Lu ◽  
Kai Xiao ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Fine Particle ◽  
Principal Component ◽  
Late Summer ◽  
Carcinogenic Risk ◽  
Diesel Emissions ◽  
Gas Chromatography Mass Spectrometry ◽  
Polycyclic Aromatic ◽  
Industry Area

The main objective of this study was to examine the chemical characteristics, possible sources, and health risks of fine particle-bound Polycyclic Aromatic Hydrocarbons (PAHs) in the Baoshan area of Shanghai. Here, ambient particles with five-size ranges were collected during the spring and late summer of 2017. The PAHs were determined by the Gas Chromatography-Mass Spectrometry (GC-MS). Our results showed that the average mass concentration of 13 species of PAHs in spring and in late summer was 4.83 (1.88~12.1) ng/m3 and 4.27 (2.09~5.75) ng/m3 in Total Suspended Particles (TSPs), respectively. The higher PAH ratios (PM1.1/TSPs) indicated that PAHs are mainly concentrated in PM1.1, especially in late summer. The values of BaA/(BaA+CHR) were under 0.50 and IcdP/(IcdP+BghiP) were in range from 0.20 to 0.50 for TSP and PM1.1, suggesting that petroleum combustion and diesel emissions could be considered as key sources of PAHs, which tend to be associated with PM1.1. Moreover, the Principal Component Analysis (PCA) in PM1.1 identified the main PH sources, which include stationary and diesel emissions. The air mass backward trajectories and wind direction analysis showed that air masses were mainly derived from marine sources across the local industry area in late summer. Individual Carcinogenic Risk Inhalation (ILCR) was over 10−6 among the total six age groups in both of the sampling periods in TSPs, indicating the possible carcinogenic risk, especially for children and the young age group. Toxic PAHs belong to Heavy Molecular Weight (HMW) PAHs, especially Benzo[a]pyrene (BaP). Compared with PM1.1–2.0, the Combustion-Derived PAHs group (COMPAHs) and Carcinogenic PAHs (CANPAHs) were highly concentrated in PM1.1. Stationary sources, such as the developed steel industry, made a great contribution to the level of PAHs, especially in late summer.

Polycyclic aromatic hydrocarbons in flames, in diesel fuels, and in diesel emissions

2006 ◽  
Vol 144 (4) ◽  
pp. 773-781 ◽  
Author(s):  
Richard A. Dobbins ◽  
Robert A. Fletcher ◽  
Bruce A. Benner ◽  
Stephen Hoeft
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Diesel Emissions ◽  
Diesel Fuels ◽  
Polycyclic Aromatic

The Assessment of Contamination and Source of Polycyclic Aromatic Hydrocarbons from the Sediments of the Someş River

2019 ◽  
Vol 64 (1) ◽  
pp. 55-67
Author(s):  
Vlad Pӑnescu ◽  
◽  
Mihaela Cӑtӑlina Herghelegiu ◽  
Sorin Pop ◽  
Mircea Anton ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

1,1’-Biaceanthrylene and 2,2'-Biaceanthrylene: Models for Linking Larger Polycyclic Aromatic Hydrocarbons via Five-Membered Rings

2019 ◽  
Author(s):  
Yachu Du ◽  
Kyle Plunkett
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Electronic Properties ◽  
Aromatic Hydrocarbons ◽  
Model Systems ◽  
Redox Potentials ◽  
Dimer Model ◽  
Optical And Electronic Properties ◽  
Polycyclic Aromatic

We show that polycyclic aromatic hydrocarbon (PAH) chromophores that are linked between two five-membered rings can access planarized structures with reduced optical gaps and redox potentials. Two aceanthrylene chromophores were connected into dimer model systems with the chromophores either projected outward (2,2’-biaceanthrylene) or inward (1,1’-biaceanthrylene) and the optical and electronic properties were compared. Only the planar 2,2’-biaceanthrylene system showed significant reductions of the optical gaps (1 eV) and redox potentials in relation to the aceanthrylene monomer.<br>

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