Characteristic of Atmospheric Mercury in urban of Beijing,August 2007
Introduction Mercury is a highly toxic element that is found both natural and human activities contaminant in the environment, which has chemical and physical properties that enable its long-range transportation and is considered as a global-scale pollutant. Atmospheric mercury has a variety of natural and anthropogenic sources. Natural sources include volcanoes, forests, lakes, soils, and oceans. While fossil fuel combustion, metallurgical processes, and waste incineration in cities constitute the largest contributions to anthropogenic mercury emissions, the main mercury sources differ between cities. By the end of 2000, mercury emissions from anthropogenic sources exceeded those form natural sources. As a result of anthropogenic emissions, the global atmospheric mercury deposition rate is approximately three times higher than in pre-industrial times, and has increased by factors of 2-10 around the most industrialized regions. In order to reduce the environmental input and human exposure, efforts have been directed at reducing mercury emissions from industries, waste incinerators, and coal-fired power plants. In China, mercury has become a significant environmental pollutant. As in other countries, this has resulted from local mining and industrial use of mercury in the manufacture of plastics, paper, and batteries; with the resultant discharge of contaminated effluents into the atmosphere, lakes, rivers, and the sea. Total gaseous mercury (TGM) has previously been measured in several cities in China, such as Beijing, Changchun, and Guizhou, but other atmospheric mercury species are still little known. Beijing is mega city, which has 3 million vehicles and 20 million peoples on kilometers. Campaigns of Air Quality Research in Beijing and surrounding region 2007 was conducted in Aug 2007 to evaluate how effective the traffic control is in improving air quality. Through this campaign, we measured total gaseous mercury (TGM), particular mercury (PM) and reactive gaseous mercury (RGM), characteristic of atmospheric mercury in urban of Beijing, August 207, was gotten.
Junxia Wang Tong Zhu Xinbin Feng Qi Wan
College of environmental sciences and engineering,Peking University,the State Key Laboratory of envi Institute of Geochemistry Chinese Academy of Sciences,the State Key laboratory of Environmental Geoc
国际会议
International Conference on Environment Simulation and Pollution Control(第六届环境模拟与污染控制学术研讨会)
北京
英文
116-117
2009-11-01（万方平台首次上网日期，不代表论文的发表时间）