为研究金矿区高汞环境条件下大气汞迁移特性,应用野外实验与模型分析相结合的方法,对区域大气汞污染源进行了解析.在研究区按网格法设置28个监测点,使用测汞仪(ZeemanLUMEXRA915’)对各监测点大气汞含量进行连续监测,并应用Unmix6.0受体模型对区域内大气汞污染源进行解析.结果表明:Unmix6.0解析得到区域内大气汞污染源为4源方案,据监测点原状分析,将4类污染源依次解析为交通源、土壤源、金矿选冶点源和聚居区源.在水平尺度,4类污染源对各监测点汞贡献值依次为:9.43,86.73,105.85,136.62ng/m3;在垂向尺度,即对各监测点50,100和150cm三层次、4类污染源汞贡献总值依次为:108.59,112.99和117.05ng/m3.4类污染源汞贡献率大小依次为居民点〉历史金矿点〉土壤源〉交通源;人为释汞过程仍为区域大气汞的主要来源.
In order to study the migration of gaseous mercury in gold mine area, the air mercury has been interpreted through the integration of field survey and model test. During the period from April 22na to 24th in 2012 ,the 28 monitoring sites were settled based on the grid method in Jiapigou gold mine and the air mercury content was continuously determined with mercury analyzer (Zeeman LUMEX RA915+). Furthermore, the receptor model Unmix6.0 was applied to analyze the source of the air mercury. The results represent that 4-source project has been obtained through Unmix6.0,consisting of the sources from traffic, soil, gold processing and residence based on the survey of the monitoring sites. Horizontally, four sources contributing to the mercury in each monitoring site are 9.43,86.73, 105.85,136.62 ng/ma respectively while the figures from each monitoring site from the three layers (50 cm, 100 cm and 150 cm) are shown to be 108. 59, 112. 99, 117. 05 ng/ma vertically. The interrelationship of the four sources in terms of the contributing proportion is residence ~ gold processing~soil~traffic. The mercury release of residence makes up the major source in this area.