摘要
系统研究了燃煤型城市长春市汞界面交换通量.根据区域污染源的汞排放通量,大气汞干、湿沉降通量,水面、地面汞的挥发量以及由径流输出的汞量,初步估算了城市汞的收支平衡.长春市燃料燃烧排放的汞量为425.6kg/a,地面扬尘向大气输出汞5.5kg/a,大气干沉降通量为11.72kg/a,湿沉降通量23.09kg/a,地面、水面汞挥发通量9.46kg/a,径流输出通量3.8kg/a.从汞的全球循环和区域循环的角度看,整个建成区的城市系统是汞的源,而城市生态系统各组成部分又具有汇的特征,水体、土壤、植物中汞的累积明显,汞污染呈逐渐加重的趋势.
The exchange flux of mercury in the Changchun City of north coal burning type was studied system atically. Based on the mercury discharged flux of areal polluted source, wet/dry deposition flux, emitting flux of the surfaces of water and land, and the runoff flux of mercury. The input/output balance of urban mercury was estimated preliminarily 425.6kg/a mercury was emitted from the combustion of fuel in Changchun City; the mercury emitted from the land surface dust was 5.5kg/a, the atmospheric dry depositions flux of mercury was 11.72kg/a; the wet deposition flux was 23.09kg/a; the mercury emitted flux from the surface of water and land was 9.46kg/a; and the runoff flux was 3.8kg/a. Viewed from the global and areal cycles of mercury the city system of all the constructed area was the source of mercury; which of the city ecology system had the characteristic of sink; mercury accumulated obvious in the waters, soil and plant; and the mercury pollution tended to increase gradually.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2005年第4期475-479,共5页
China Environmental Science
基金
国家自然科学基金资助项目(40371100)
关键词
汞
界面交换
通量
长春市
mercury, interface exchange
flux
Changchun City
