摘要
大气汞是全球性的污染物,其来源有自然源和人为源,亚洲地区是最大的人为大气汞排放源,占全球人为排汞量的67%(质量分数),其中又以中国为最。燃煤和有色金属冶炼对中国大气汞排放的贡献最大。环境界面的释汞通量是全球大气汞预算的重要组成部分,也是目前的研究热点之一。综述了不同环境界面的释汞通量及其影响因素,并比较了不同地区大气汞的浓度分布和季节变化。大气汞的浓度水平受到本地源、环境参数(太阳辐射、温度和相对湿度等)以及外地源长距离输入的影响,相对而言,城区大气汞浓度高于郊区,冬季大气汞浓度高于夏季。
As a global pollutant, atmospheric mercury has been attracting more and more attention in now days. Both natural and anthropogenic sources contributed to the atmospheric mercury emission. About two-thirds of global anthropogenic releases of atmospheric mercury come from Asian, and China as the largest contributor. Coal combustion and nonferrous metals smelting are the two main mercury sources in China. Mercury exchange flux is important in determining the global mercury budgets, which becomes one of research hotspots in field of atmospheric environment. This paper reviewed studies about the characteristics of mercury exchange between air and other environmental surfaces, and compared atmospheric mercury concentrations in different areas. It can be concluded that mercury concentrations were impacted by local sources, meteorological conditions, as well as long-range transportation of mercury from other sources. Generally, atmospheric mercury concentrations in the urban were higher than that of suburb, and the average mercury concentrations were higher in winter than that in summer.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2011年第11期82-88,92,共8页
Environmental Pollution & Control
基金
中国科学院知识创新工程重要方向项目(No.KZCX2-YW-JS404)
关键词
大气汞
来源
释汞通量
浓度
atmospheric mercury
sources
mercury exchange flux
mercury concentrations
