纳污河补排关系变化时污染物迁移规律研究

Migration of Phenanthrene in the Aquifer when the Recharge and Discharge Relations Between the River and the Groundwater Changes

多环芳烃是危害较大的一种水体污染物,以菲为特征污染物,利用纳污河流和地下水系统模拟装置,对其在河流与地下水补排关系变化时的迁移过程进行了研究,以探索纳污河流与地下水间多环芳烃的迁移变化规律。采用Sufer软件分析了菲在地层中的迁移变化情况,并计算了其迁移速度,结果表明:模拟纳污河水补给地下水时,菲迁移速度缓慢,污染物扩散范围小,水平迁移速度为1.33 cm/d;模拟清洁地下水向河流排泄时,菲的水平迁移速度为1.67 cm/d,并在河流附近发生了短暂富集。

PAHs is a kind of harmful pollutant of water body. This paper selected ＂Phenanthrene＂ as the characterized pollutants in this ar- ticle, then used laboratory device to simulate fiver and groundwater systems and monitored phenanthrene migration process in the system. We explored the migration rule of PAHs between rivers and groundwater system, used the Sufer software to draw the Phenanthrene＇ s migration pollution halo and calculated its migration speed. The results show that Phenanthrene migrates slowly and diffuses in small -scale when the river water recharges groundwater, its hofizontal migration speed is 1.33 cm/d. Its migration speed is 1.67 crn/d when the Phenanthrene flows to the river groundwater, and produces a short enrichment in the vicinity of the fiver.