Nowadays the remediation of DNAPL contaminated zones near groundwater has gained great prominence in environmental fields due to the high importance of water resources. In this work, we suggest injecting a densified polymer suspension by adding barite particles to displace DNAPL. To evaluate the efficiency of the densification of polymer suspensions on the displacement of DNAPL, various densities of barite-polymer suspension; lower, equal, and higher than the density of DNAPL were prepared and their rheological behavior was analyzed. Then flow experiments were performed using a decimetric-scale 2D tank. The displacement procedure was monitored with an imaging technique and the production and injection process data were recorded by mass balance interpretation. It was shown that the densification of the polymer suspension could improve the displacement efficiency of DNAPL up to four times. The clogging behavior of barite-polymer suspension was assessed in a 1D column. Generalized Darcy’s law and the continuity equation were used to numerically simulate the experimental two-phase flow. To take into account the clogging behavior of the suspension, the transport equation of diluted species was implemented into the model. The simulation results show that the model can properly predicts the experimental consequences.

目前，由于水资源的重要性，地下水附近DNAPL污染区的修复在环境领域得到了广泛关注。在这项工作中，我们建议通过添加重晶石颗粒取代 DNAPL 来注入致密的聚合物悬浮液。为了评估聚合物悬浮液的致密化对 DNAPL 置换的效率，重晶石聚合物悬浮液的各种密度；制备了低于、等于和高于 DNAPL 的密度，并分析了它们的流变行为。然后使用分米规模的 2D 罐进行流动实验。使用成像技术监测置换过程，并通过质量平衡解释记录生产和注入过程数据。结果表明，聚合物悬浮液的致密化可以将 DNAPL 的置换效率提高四倍。在一维柱中评估重晶石聚合物悬浮液的堵塞行为。利用广义达西定律和连续性方程对实验两相流进行数值模拟。为了考虑悬浮液的堵塞行为，模型中采用了稀释物质的输运方程。仿真结果表明，该模型能够正确预测实验结果。为了考虑悬浮液的堵塞行为，模型中采用了稀释物质的输运方程。仿真结果表明，该模型能够正确预测实验结果。为了考虑悬浮液的堵塞行为，模型中采用了稀释物质的输运方程。仿真结果表明，该模型能够正确预测实验结果。