Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Characteristic Variation of PM-Bound Polycyclic Aromatic Hydrocarbons (PAHs) during Asian Dust Based on an Observation in a Japanese Background Site, Wajima from 2010 to 2021

Pengchu Bai
ORCID logo ,
Hao Zhang
,
Xuan Zhang
ORCID logo ,
Yan Wang
ORCID logo ,
Lulu Zhang
* ,
Atsushi Matsuki
ORCID logo ,
Seiya Nagao
ORCID logo ,
Bin Chen
,
Ning Tang
* ORCID logo
Version 1 : Received: 22 August 2023 / Approved: 22 August 2023 / Online: 23 August 2023 (03:35:05 CEST)

A peer-reviewed article of this Preprint also exists.

Bai, P.; Wang, Y.; Zhang, H.; Zhang, X.; Zhang, L.; Matsuki, A.; Nagao, S.; Chen, B.; Tang, N. Characteristic Variation of Particulate Matter-Bound Polycyclic Aromatic Hydrocarbons (PAHs) during Asian Dust Events, Based on Observations at a Japanese Background Site, Wajima, from 2010 to 2021. Atmosphere 2023, 14, 1519. Bai, P.; Wang, Y.; Zhang, H.; Zhang, X.; Zhang, L.; Matsuki, A.; Nagao, S.; Chen, B.; Tang, N. Characteristic Variation of Particulate Matter-Bound Polycyclic Aromatic Hydrocarbons (PAHs) during Asian Dust Events, Based on Observations at a Japanese Background Site, Wajima, from 2010 to 2021. Atmosphere 2023, 14, 1519.

Abstract

Asian dust (AD) events and total suspended particle (TSP) was observed at Kanazawa University Wajima Air Monitoring Station (KUWAMS), a Japanese background site, during the East Asian winter monsoon periods (from November to May of the following year) from 2010 to 2021. Nine kinds of polycyclic aromatic hydrocarbons (PAHs) were determined in each TSP sample. In this study, a total of 54 AD events were observed. According to the different pathways of long-range transportation, AD events were divided into AD-high (transported at higher altitude, around 4000 m) and AD-low (transported at lower altitude, around 2500 m). The TSP concentrations in-creased sharply in the AD and was higher in AD-high (39.8 ± 19.5 μg/m³) than that in AD-low (23.5 ± 10.5 μg/m³). While AD didn’t have significant effect on ΣPAHs characteristic variation, as ΣPAHs concentration in non-AD periods, AD-high, AD-low were 543 ± 374, 404 ± 221, 436 ± 265 pg/m³, respectively. PAHs compositions were also consistent. As a result, TSP concentration was affected by the input air mass transported at higher altitude from the desert region while PAHs concentration was under the impact of air mass at lower altitude which carried the PAHs emitted from fossil fuels and biomass combustion in northeastern China. Moreover, the health risks of PAHs were calculated by inhalation lifetime cancer risk which ranged from 10−6 to 10−5 ng/m3, in-dicating a potential carcinogenic risk at KUWAMS during the East Asian winter monsoon period.

Keywords

Asian dust; polycyclic aromatic hydrocarbons; long-range transportation

Subject

Environmental and Earth Sciences, Pollution

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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