Temporal and spatial variation in major ion chemistry and source identification of secondary inorganic aerosols in Northern Zhejiang Province, China

Xu, Jing-Sha and Xu, Meng-Xia and Snape, Colin and He, Jun and Behera, Sailesh N. and Xu, Hong-Hui and Ji, Dong-Sheng and Wang, Cheng-Jun and Yu, Huan and Xiao, Hang and Jiang, Yu-Jun and Qi, Bing and Du, Rong-Guang (2017) Temporal and spatial variation in major ion chemistry and source identification of secondary inorganic aerosols in Northern Zhejiang Province, China. Chemosphere, 179 . pp. 316-330. ISSN 1879-1298

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Available under Licence Creative Commons Attribution Non-commercial No Derivatives.
Download (1MB) | Preview

Abstract

To investigate the seasonal and spatial variations of ion chemistry of fine particles in Northern Zhejiang Province (NZP), China, one year-long field sampling was conducted at four representative sites (two urban, one suburb, and one rural sites) in both cities of Hangzhou and Ningbo from December 2014 to November 2015. Twelve water soluble inorganic ions (WSII) were characterized in this comprehensive study. The annual average of PM2.5 concentration in NZP as overall was 66.2 ± 37.7 μg m−3, and urban sites in NZP were observed with more severe PM2.5 pollution than the suburban and rural sites. The annual average concentration of total WSII at four sampling sites in NZP was 29.1 ± 19.9 μg m−3, dominated by SO42− (10.3 μg m−3), and followed by NO3− (8.9 μg m−3), NH4+ (6.6 μg m−3), Cl− (1.3 μg m−3) and K+ (0.7 μg m−3). Among all cations, NH4+ was the predominant neutralizing ion with the highest neutralization factor (NF), while the remaining cations showed limited neutralization capacity. The highest and lowest sulfur oxidation ratio (SOR) values in this region were found in summer and winter, respectively; while the seasonal patterns for nitrogen oxidation ratio (NOR) were opposite to that of SOR. Principal component analysis (PCA) showed that the significant sources of WSII in NZP were industrial emissions, biomass burning, and formation of secondary inorganic aerosols. In addition, contribution from transboundary transport of polluted aerosols was also confirmed from the assessment through air mass backward trajectory analysis.

Item Type: Article
Keywords: Northern Zhejiang Province; PM2.5; Inorganic ions; Temporal and spatial variability; PCA
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Department of Chemical and Environmental Engineering
Identification Number: https://doi.org/10.1016/j.chemosphere.2017.03.119
Depositing User: Yu, Tiffany
Date Deposited: 16 Nov 2018 10:46
Last Modified: 29 Mar 2019 04:30
URI: http://eprints.nottingham.ac.uk/id/eprint/55546

Actions (Archive Staff Only)

Edit View Edit View