Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
J Contam Hydrol. 2012 Jun;134-135:12-21. doi: 10.1016/j.jconhyd.2012.04.004. Epub 2012 Apr 16.
A multiphase heat transfer numerical model is used to simulate a laboratory experiment of contaminant removal at boiling temperatures from a rock core representing the matrix adjacent to a fracture. The simulated temperature, condensate production, contaminant and bromide concentrations are similar to experimental data. A key observation from the experiment and simulation is that boiling out approximately 1/2 pore volume (50 mL) of water results in the removal of essentially 100% of the dissolved volatile contaminant (1,2-DCA). A field-scale simulation using the multiple interacting continua (MINC) discretization approach is conducted to illustrate possible applications of thermal remediation of fractured geologic media, assuming uniform heating. The results show that after 28% of the pore water (including both steam vapor and liquid water) was extracted, and essentially all the 1,2-DCA mass (more than 99%) was removed.
采用多相传热数值模型模拟了在沸腾温度下从岩芯中去除污染物的实验室实验，该岩芯代表与裂缝相邻的基质。模拟的温度、冷凝水产量、污染物和溴化物浓度与实验数据相似。实验和模拟的一个关键观察结果是，沸腾出大约 1/2 孔隙体积（50 毫升）的水导致基本上 100%的溶解挥发性污染物（1,2-DCA）被去除。使用多相互作用连续体（MINC）离散化方法进行了现场尺度模拟，以说明在假设均匀加热的情况下，对断裂地质介质进行热修复的可能应用。结果表明，在提取了 28%的孔隙水（包括蒸汽和液态水）后，基本上去除了 1,2-DCA 的所有质量（超过 99%）。
