scholarly journals Polycyclic Aromatic Hydrocarbons Concentration in Straw Biochar with different Particle Size

2016 ◽  
Vol 31 ◽  
pp. 91-97 ◽  
Author(s):  
Yungui Li ◽  
Yang Liao ◽  
Ye He ◽  
Kun Xia ◽  
Shufeng Qiao ◽  
...  
Keyword(s):  
Particle Size ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

Particle Size Distribution and Gas-Particle Partition of Polycyclic Aromatic Hydrocarbons in Helsinki Urban Area

2004 ◽  
Vol 47 (3) ◽  
pp. 223-241 ◽  
Author(s):  
Masahiko Shimmo ◽  
Karri Saarnio ◽  
Pasi Aalto ◽  
Kari Hartonen ◽  
Tuulia Hyötyläinen ◽  
...  
Keyword(s):  
Particle Size ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Urban Area ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

scholarly journals Particle size distribution of nitrated and oxygenated polycyclic aromatic hydrocarbons (NPAHs and OPAHs) on traffic and suburban sites of a European megacity: Paris (France)

2012 ◽  
Vol 12 (18) ◽  
pp. 8877-8887 ◽  
Author(s):  
J. Ringuet ◽  
E. Leoz-Garziandia ◽  
H. Budzinski ◽  
E. Villenave ◽  
A. Albinet
Keyword(s):  
Particle Size ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Size Distribution ◽  
Aromatic Hydrocarbons ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Oxygenated Polycyclic Aromatic Hydrocarbons ◽  
Polycyclic Aromatic ◽  
Traffic Site ◽  
Suburban Site

Abstract. The size distribution of particulate nitrated and oxygenated polycyclic aromatic hydrocarbons (NPAHs and OPAHs) was determined during two field campaigns at a traffic site in summer 2010 and at a suburban site during the MEGAPOLI (Megacities: Emissions, urban, regional and Global Atmospheric POLlution and climate effects, and Integrated tools for assessment and mitigation) experiment in summer 2009. Both, OPAHs and NPAHs were strongly associated (>85%) to fine particles (Dp< 2.5 μm) increasing the interest of their study on a sanitary point of view. Results showed really different NPAH and OPAH particle size distributions between both sites. At traffic site, clearly bimodal (notably for NPAHs) particle size distributions (Dp = 0.14 and 1.4 μm) were observed, while the particle size distributions were more scattered at the suburban site, especially for OPAHs. Bimodal particle size distribution observed at traffic site for the NPAH could be assigned to the vehicle emissions and the particle resuspension. Broadest distribution observed at the suburban site could be attributed to the mass transfer of compounds by volatilization/sorption processes during the transport of particles in the atmosphere. Results also showed that the combination of the study of particle size distributions applied to marker compounds (primary: 1-nitropyrene; secondary: 2-nitrofluoranthene) and to NPAH or OPAH chemical profiles bring some indications on their primary and/or secondary origin. Indeed, 1,4-anthraquinone seemed only primary emitted by vehicles while 7-nitrobenz[a]anthracene, benz[a]antracen7,12-dione and benzo[b]fluorenone seemed secondarily formed in the atmosphere.

Estimation of origins of polycyclic aromatic hydrocarbons in size-fractionated road dust in Tokyo with multivariate analysis

2005 ◽  
Vol 51 (3-4) ◽  
pp. 169-175 ◽  
Author(s):  
P. Pengchai ◽  
F. Nakajima ◽  
H. Furumai
Keyword(s):  
Particle Size ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Road Dust ◽  
Vehicle Exhaust ◽  
Size Fractions ◽  
Particle Size Fractions ◽  
The Road ◽  
Polycyclic Aromatic ◽  
Diesel Vehicle

This study aimed to estimate the origins of polycyclic aromatic hydrocarbons (PAHs) in size-fractionated road dust in Tokyo. First, seven categories of PAHs sources were defined: diesel vehicle exhaust, gasoline vehicle exhaust, tire, pavement, asphalt or bitumen, petroleum products excluding tire and asphalt, and combustion products except for those in vehicle engines. The 189 source data of 12-PAHs profiles were classified into 11 groups based on cluster analysis combined with principal component analysis. Next, 18 road dust samples were collected from eight streets in Tokyo and fractionated into four different particle-size-fractions: 0.1–45, 45–106, 106–250, and 250–2,000 μm. In order to estimate the contributions of the classified source groups (S1–S11) to PAHs in the road dust, multiple regression analysis was performed with 12-PAH profile of the road dust as dependent variable and average 12-PAHs profiles of the 11 source groups as 11 explanatory variables. Diesel vehicle exhaust, tire and pavement were the major contributors of PAHs in the fractionated road dust. Although the estimated contributions of the 11 source groups varied among the particle-size-fractions, there was no clear and consistent relationship between particle size and the major PAH contributor.

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