TY - JOUR
T1 - Atmospheric deposition of polycyclic aromatic hydrocarbons (PAHs) in Shanghai
T2 - the spatio-temporal variation and source identification
AU - Cheng, Chen
AU - Bi, Chunjuan
AU - Wang, Dongqi
AU - Yu, Zhongjie
AU - Chen, Zhenlou
N1 - Publisher Copyright:
© 2018, Higher Education Press and Springer-Verlag Berlin Heidelberg.
PY - 2018/3/1
Y1 - 2018/3/1
N2 - This study investigated the dry and wet deposition fluxes of atmospheric polycyclic aromatic hydrocarbons (PAHs) in Shanghai, China. The flux sources were traced based on composition and spatio-temporal variation. The results show that wet deposition concentrations of PAHs ranged from 0.07 to 0.67 mg·L–1 and were correlated with temperature (P<0.05). Dry deposition of PAHs concentrations ranged from 3.60–92.15 mg·L–1 and were higher in winter and spring than in summer and autumn. The annual PAH average fluxes were 0.631 mg·m–2·d–1 and 4.06 mg·m–2·d–1 for wet and dry deposition, respectively. The highest wet deposition of PAH fluxes was observed in summer, while dry deposition fluxes were higher in winter and spring. Atmospheric PAHs were deposited as dry deposition in spring and winter, yet wet deposition was the dominant pathway during summer. Total atmospheric PAH fluxes were higher in the northern areas than in the southern areas of Shanghai, and were also observed to be higher in winter and spring. Annual deposition of atmospheric PAHs was about 10.8 t in across all of Shanghai. Wet deposition of PAHs was primarily composed of two, three, or four rings, while dry deposition of PAHs was composed of four, five, or six rings. The atmospheric PAHs, composed of four, five, or six rings, primarily existed in the form of particulates. Coal combustion and vehicle emissions were the dominant sources of PAH in the observed area of downtown Shanghai. In suburban areas, industrial pollution, from sources such as coke oven, incinerator, and oil fired power plant, was as significant as vehicle emissions in contributing to the deposition of PAHs.
AB - This study investigated the dry and wet deposition fluxes of atmospheric polycyclic aromatic hydrocarbons (PAHs) in Shanghai, China. The flux sources were traced based on composition and spatio-temporal variation. The results show that wet deposition concentrations of PAHs ranged from 0.07 to 0.67 mg·L–1 and were correlated with temperature (P<0.05). Dry deposition of PAHs concentrations ranged from 3.60–92.15 mg·L–1 and were higher in winter and spring than in summer and autumn. The annual PAH average fluxes were 0.631 mg·m–2·d–1 and 4.06 mg·m–2·d–1 for wet and dry deposition, respectively. The highest wet deposition of PAH fluxes was observed in summer, while dry deposition fluxes were higher in winter and spring. Atmospheric PAHs were deposited as dry deposition in spring and winter, yet wet deposition was the dominant pathway during summer. Total atmospheric PAH fluxes were higher in the northern areas than in the southern areas of Shanghai, and were also observed to be higher in winter and spring. Annual deposition of atmospheric PAHs was about 10.8 t in across all of Shanghai. Wet deposition of PAHs was primarily composed of two, three, or four rings, while dry deposition of PAHs was composed of four, five, or six rings. The atmospheric PAHs, composed of four, five, or six rings, primarily existed in the form of particulates. Coal combustion and vehicle emissions were the dominant sources of PAH in the observed area of downtown Shanghai. In suburban areas, industrial pollution, from sources such as coke oven, incinerator, and oil fired power plant, was as significant as vehicle emissions in contributing to the deposition of PAHs.
KW - PAHs
KW - Shanghai
KW - dry and wet deposition
KW - temporal and spatial variation
UR - http://www.scopus.com/inward/record.url?scp=85008517808&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85008517808&partnerID=8YFLogxK
U2 - 10.1007/s11707-016-0613-0
DO - 10.1007/s11707-016-0613-0
M3 - Article
AN - SCOPUS:85008517808
SN - 2095-0195
VL - 12
SP - 63
EP - 71
JO - Frontiers of Earth Science
JF - Frontiers of Earth Science
IS - 1
ER -