曝气法去除地下水中甲基叔丁基醚的模拟研究

Simulation of Removal of Methyl tert-Butyl Ether in Groundwater by Air Sparging

建立数学模型研究地下水曝气法去除地下水中甲基叔丁基醚,模型考虑了对流、分子扩散、机械弥散和相间传质等过程。在实验室中用土柱实验来模拟地下水曝气过程,分别考察了渗透率和曝气流量对甲基叔丁基醚去除效果的影响。结果显示,以粗砂为介质比以细砂为介质更有利于去除甲基叔丁基醚。以粗砂为介质,在曝气流量为0.10 m^3/h 时,甲基叔丁基醚的去除率可达95%。模型拟合结果与实验结果吻合较好。

The removal of methyl terbbutyl ether by air sparging was simulated by a mathematical model,which considered the advective flux, diffusion, mechanical dispersion and interphase mass transfer. The experiments of removing methyl tert-butyl ether by air sparging were carried out in a soil column. The results showed that the coarse sand was more favorable for removing methyl tert-butyl ether than the fine sand. The removal of methyl tert-butyl ether could reached 95% by coarse sand as medium when airflow was 0.10m^3/h. The simulation results agreed with the experimental reaults well.