Huimeng Jiang1, Han Xiao1, He Song1, Jian Liu1, Tao Wang2, Hairong Cheng This email address is being protected from spambots. You need JavaScript enabled to view it.1, Zuwu Wang This email address is being protected from spambots. You need JavaScript enabled to view it.1

1 School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China
2 Xiangyang Environment Protection Monitoring Station, Xiangyang 441021, China


 

Received: February 20, 2020
Revised: June 1, 2020
Accepted: June 2, 2020

 Copyright The Author's institutions. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.2020.02.0068 


Cite this article:

Jiang, H., Xiao, H., Song, H., Liu, J., Wang, T., Cheng, H, and Wang, Z. (2020). A Long-lasting Winter Haze Episode in Xiangyang, Central China: Pollution Characteristics, Chemical Composition, and Health Risk Assessment. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.2020.02.0068


 

ABSTRACT


This study investigated the pollution characteristics and chemical composition of PM2.5 from Jan. 13-24, 2018 during a long-lasting winter haze episode. The average daily concentrations of PM2.5, water-soluble inorganic ions, organic carbon (OC), elemental carbon (EC), and trace elements were 169.29±56.98, 111.45±44.62, 20.74±6.79, 6.48±1.79 and 10.53±3.84 μg m-3, respectively. The OC/EC ratios indicated a mixed contribution of intensive traffic emissions and secondary formations. The estimated primary organic carbon (POC) and secondary organic carbon (SOC) concentrations increased as the pollution levels increased. POC dominated the OC when there was mild and moderate pollution; SOC dominated the OC when there was severe pollution. The enrichment factor (EF) and geo-accumulation index (Igeo) were used to assess the contamination level of PM2.5-bound metal(loid)s, revealing a strong positive correlation. A health risk assessment was conducted to evaluate the non-carcinogenic and carcinogenic risks of PM2.5-bound metal(loid)s on human health. The metal(loid)s As, Cr, Pb, and Sb may pose a potential non-carcinogenic risk for both children and adults. The metal(loid)s As and Pb may also pose a potential carcinogenic risk. The total non-carcinogenic and carcinogenic risks for PM2.5-bound metal(loid)s were slightly higher for adults (3.07×103, 3.78×10-3) compared to children (2.71×103, 2.99×10-3). These levels did not depend on the pollution levels, but rather the concentrations of PM2.5-bound metal(loid)s. The public and government should implement effective measures to mitigate health risks created by PM2.5-bound metal(loid)s during winter haze episodes in Xiangyang, central China.


Keywords: PM2.5; Haze episode; Metal(loid)s; Winter; Health risk assessment.



Aerosol Air Qual. Res. 20:-. https://doi.org/10.4209/aaqr.2020.02.0068 


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