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- Title
Emission of Hg from Coal Consumption in China and Its Summertime Deposition Calculated by CMAQ-Hg.
- Authors
Jiannong Quan; Qiang Zhang; Xiaoshan Zhang
- Abstract
Mercury (Hg) emission from coal combustion in China is estimated in this study and its deposition calculated using the Models-3 Community Multi-scale Air Quality (CMAQ-Hg) modeling system with meteorological fields calculated by MM5. Three kinds of Hg speciation were included in the models: particle-bound Mercury (PHg), gaseous elemental Mercury (GEM) and gas oxidized Mercury (RGM). Much of the Hg was released as RGM from coal combustion in China, accounting for 58.4 - 66.8% of total emissions. The large proportion of RGM in overall Hg emission also led to large Hg deposition. Based on simulations, Hg deposition originating from coal combustion reaches as high as 2 - 6 µg m-2 month-1 in south western China (particularly Guizhou Province), the industrialized and populated regions of east central and coastal China, and Liaoning Province in the northeast.
- Subjects
CHINA; MERCURY; EMISSIONS (Air pollution); COAL combustion; ATMOSPHERIC deposition
- Publication
Terrestrial, Atmospheric & Oceanic Sciences, 2009, Vol 20, Issue 2, p325
- ISSN
1017-0839
- Publication type
Article
- DOI
10.3319/TAO.2008.01.23.01(A)