Atmospheric emissions estimation of Hg, As, and Se from coal-fired power plants in China, 2007 |
| |
Authors: | Tian Hezhong Wang Yan Xue Zhigang Qu Yiping Chai Fahe Hao Jiming |
| |
Affiliation: | a State Key Joint Laboratory of Environmental Simulation & Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, Chinab Chinese Research Academy of Environmental Sciences, Beijing 100012, Chinac Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China |
| |
Abstract: | Over half of coal in China is burned directly by power plants, becoming an important source of hazardous trace element emissions, such as mercury (Hg), arsenic (As), and selenium (Se), etc. Based on coal consumption by each power plant, emission factors classified by different boiler patterns and air pollution control devices configuration, atmospheric emissions of Hg, As, and Se from coal-fired power plants in China are evaluated. The national total emissions of Hg, As, and Se from coal-fired power plants in 2007 are calculated at 132 t, 550 t, and 787 t, respectively. Furthermore, according to the percentage of coal consumed by units equipped with different types of PM devices and FGD systems, speciation of mercury is estimated as follows: 80.48 t of Hg, 49.98 t of Hg2+, and 1.89 t of HgP, representing 60.81%, 37.76%, and 1.43% of the totals, respectively. The emissions of Hg, As, and Se in China's eastern and central provinces are much higher than those in the west, except for provinces involved in the program of electricity transmission from west to east China, such as Sichuan, Guizhou, Yunnan, Shaanxi, etc. |
| |
Keywords: | Emission Hg As Se Emission factor Coal-fired power plants |
本文献已被 ScienceDirect PubMed 等数据库收录! |
|