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Environ Sci Technol

Title:		Ambient PM(2.5) and Related Health Impacts of Spontaneous Combustion of Coal and Coal Gangue
Author(s):		Guo W; Chen B; Li G; Liu M; Liu X; Chen Q; Zhang X; Li S; Chen S; Feng W; Zhang R; Chen M; Shi T;
Address:		"Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, P. R. China. Department of Geography, State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong SAR 999077, P. R. China. Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan. School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom. National Centre for Atmospheric Science, University of Leeds, Leeds LS2 9JT, United Kingdom. School of Electronic and Information Engineering, Lanzhou Jiaotong University, Lanzhou 730000, P. R. China"
Journal Title:		Environ Sci Technol
Year:		2021
Volume:		20210404
Issue:		9
Page Number:		5763 - 5771
DOI:		10.1021/acs.est.1c00150
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Coal and coal gangue spontaneous combustion (CGSC) occurs globally, causing significant environmental pollution. However, its emissions are poorly quantified and are overlooked in global or regional air pollutant emission inventories in previous studies, resulting in the underestimation of its impacts on climate, environment, and public health. This study quantified the emissions of various air pollutants originating from CGSC in Wuhai, a city in China, investigated emission characteristics, and estimated the contribution of CGSC emissions to fine particulate matter (PM(2.5)) air pollution and related health impacts on a regional scale. The results revealed that the CGSC-related PM(2.5) emissions were approximately 4643 t a(-1) (95% confidence interval (95% CI): 721; 10447), accounting for 26.3% of the total PM(2.5) emissions. Alkanes, alkenes, and aromatics accounted for 69.4, 17.9, and 2.9%, respectively, of the total emissions of volatile organic compounds (VOCs). Due to CGSC emissions, the ambient PM(2.5) concentration in Wuhai increased by 5.7 mug m(-3) on average, while the nitrate concentration decreased. The number of premature deaths caused by exposure to ambient PM(2.5) associated with CGSC reached 381 (95% CI: 290; 452) in Wuhai and surrounding cities in 2017. Urgent control strategies and engineering techniques are needed to mitigate CGSC to protect public health"
Keywords:		*Air Pollutants/analysis *Air Pollution/analysis China Cities Coal/analysis Environmental Monitoring Particulate Matter/analysis Spontaneous Combustion;
Notes:		"MedlineGuo, Wenkai Chen, Bing Li, Guangyao Liu, Mingyue Liu, Xiao Chen, Qiang Zhang, Xiaorui Li, Shixue Chen, Siyu Feng, Wuhu Zhang, Ruixin Chen, Mei Shi, Tenglong eng Research Support, Non-U.S. Gov't 2021/04/06 Environ Sci Technol. 2021 May 4; 55(9):5763-5771. doi: 10.1021/acs.est.1c00150. Epub 2021 Apr 4"