Gaseous and particulate polycyclic aromatic hydrocarbons at the Gosan background site in East Asia

2012 ◽  
Vol 49 ◽  
pp. 311-319 ◽  
Author(s):  
J.Y. Kim ◽  
J.Y. Lee ◽  
S.-D. Choi ◽  
Y.P. Kim ◽  
Y.S. Ghim
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
East Asia ◽  
Aromatic Hydrocarbons ◽  
Background Site ◽  
Polycyclic Aromatic

scholarly journals Characteristics of Polycyclic Aromatic Hydrocarbons (PAHs) and Common Air Pollutants at Wajima, a Remote Background Site in Japan

2020 ◽  
Vol 17 (3) ◽  
pp. 957 ◽  
Author(s):  
Xuan Zhang ◽  
Lulu Zhang ◽  
Lu Yang ◽  
Quanyu Zhou ◽  
Wanli Xing ◽  
...  
Keyword(s):  
Air Pollution ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Air Pollutants ◽  
Sampling Site ◽  
Air Pollutant ◽  
Diagnostic Ratios ◽  
Back Trajectory ◽  
Background Site ◽  
Polycyclic Aromatic

Background: Background sites are mainly affected by long-range-transported air pollutants, resulting in potential adverse effects on local atmospheric environments. A 4–5 year observational study was conducted to illustrate the air pollution profile at the Kanazawa University Wajima air monitoring station (KUWAMS), an ideal remote background site in Japan. Methods: Nine polycyclic aromatic hydrocarbons (PAHs) in the particulate phase and various air pollutants were continuously monitored for 4–5 years. Diagnostic ratios of PAHs and back-trajectory analysis were applied to trace the possible sources of the air pollutants collected at the sampling site. Results: The atmospheric concentration of PAHs in the atmosphere at the site decreased from 2014 to 2019, benefit from the predominant air pollution control policy in China and Japan. Common air pollutants including sulfur dioxide (SO2), nitrogen oxides (NOx), ozone, methane (CH4), and non-methane hydrocarbon (NMHC) were detected in low concentrations from 2016 to 2019, while ozone (O3) and particulate matter (PM2.5, PM with a diameter less than 2.5 μm) were present in high levels that exceeded the Japanese standards. Most air pollutants peaked in spring and showed evident diurnal variations in spring and summer. Conclusions: This is the first study to clarify the atmospheric behaviors of multiple air pollutants at a background site in Japan. Significant external air pollutant impact and unneglectable air pollution were demonstrated at KUWAMS, indicating the importance of studying atmospheric pollution at remote sites.

scholarly journals Atmospheric Behaviors of Polycyclic Aromatic Hydrocarbons in East Asia

2014 ◽  
Vol 36 (3) ◽  
pp. 152-159 ◽  
Author(s):  
Kazuichi Hayakawa ◽  
Ning Tang ◽  
Takayuki Kameda ◽  
Akira Toriba
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
East Asia ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

scholarly journals Sources of polycyclic aromatic hydrocarbons to sediments of the Bohai and Yellow Seas in East Asia

2011 ◽  
Vol 116 (D23) ◽  
pp. n/a-n/a ◽  
Author(s):  
Tian Lin ◽  
Limin Hu ◽  
Zhigang Guo ◽  
Yanwen Qin ◽  
Zuosheng Yang ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
East Asia ◽  
Aromatic Hydrocarbons ◽  
Polycyclic Aromatic

scholarly journals Atmospheric deposition of chlorinated and brominated polycyclic aromatic hydrocarbons in central Europe analyzed by GC-MS/MS

2021 ◽  
Author(s):  
Rong Jin ◽  
Benjamin A. Musa Bandowe ◽  
Minghui Zheng ◽  
Guorui Liu ◽  
Barbora Nežiková ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Central Europe ◽  
Aromatic Hydrocarbons ◽  
Atmospheric Environment ◽  
Urban Site ◽  
Quadrupole Mass ◽  
Deposition Fluxes ◽  
Background Site ◽  
Polycyclic Aromatic ◽  
First Time

AbstractChlorinated and brominated polycyclic aromatic hydrocarbons (ClPAHs and BrPAHs) are persistent organic pollutants that are ubiquitous in the atmospheric environment. The sources, fate, and sinks in the atmosphere of these substances are largely unknown. One of the reasons is the lack of widely accessible analytical instrumentation. In this study, a new analytical method for ClPAHs and BrPAHs using gas-chromatography coupled with triple quadrupole mass spectrometry is presented. The method was applied to determine ClPAHs and BrPAHs in total deposition samples collected at two sites in central Europe. Deposition fluxes of ClPAHs and BrPAHs ranged 580 (272–962) and 494 (161–936) pg m−2 day−1, respectively, at a regional background site, Košetice, and 547 (351–724) and 449 (202–758) pg m−2 day−1, respectively, at a semi-urban site, Praha-Libuš. These fluxes are similar to those of PCBs and more than 2 orders of magnitude lower than those of the parent PAHs in the region. Seasonal variations of the deposition fluxes of these halogenated PAHs were found with maxima in summer and autumn, and minima in winter at Košetice, but vice versa at Praha-Libuš. The distribution of ClPAHs and BrPAHs between the particulate and dissolved phases in deposition samples suggests higher degradability of particulate BrFlt/Pyr and BrBaA than of the corresponding ClPAHs. A number of congeners were detected for the first time in the atmospheric environment.

scholarly journals Regional modelling of polycyclic aromatic hydrocarbons: WRF-Chem-PAH model development and East Asia case studies

2017 ◽  
Vol 17 (19) ◽  
pp. 12253-12267
Author(s):  
Qing Mu ◽  
Gerhard Lammel ◽  
Christian N. Gencarelli ◽  
Ian M. Hedgecock ◽  
Ying Chen ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
East Asia ◽  
Aromatic Hydrocarbons ◽  
Atmospheric Chemistry ◽  
Heterogeneous Reaction ◽  
Regional Modelling ◽  
Wide Range ◽  
Mass Fractions ◽  
Polycyclic Aromatic ◽  
Particulate Mass

Abstract. Polycyclic aromatic hydrocarbons (PAHs) are hazardous pollutants, with increasing emissions in pace with economic development in East Asia, but their distribution and fate in the atmosphere are not yet well understood. We extended the regional atmospheric chemistry model WRF-Chem (Weather Research Forecast model with Chemistry module) to comprehensively study the atmospheric distribution and the fate of low-concentration, slowly degrading semivolatile compounds. The WRF-Chem-PAH model reflects the state-of-the-art understanding of current PAHs studies with several new or updated features. It was applied for PAHs covering a wide range of volatility and hydrophobicity, i.e. phenanthrene, chrysene and benzo[a]pyrene, in East Asia. Temporally highly resolved PAH concentrations and particulate mass fractions were evaluated against observations. The WRF-Chem-PAH model is able to reasonably well simulate the concentration levels and particulate mass fractions of PAHs near the sources and at a remote outflow region of East Asia, in high spatial and temporal resolutions. Sensitivity study shows that the heterogeneous reaction with ozone and the homogeneous reaction with the nitrate radical significantly influence the fate and distributions of PAHs. The methods to implement new species and to correct the transport problems can be applied to other newly implemented species in WRF-Chem.

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