【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.更多还原

【Abstract】 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.更多还原