The membrane interface probe (MIP) is an efficient and economical in-situ tool for chlorinated hydrocarbon (CH) contaminated site investigation. Given that the interpretation of MIP test is currently limited to a qualitative level, a theoretical model considering multiphase flow and multifield coupling is firstly proposed to simulate MIP test process. This model can consider phase change, membrane effect, adsorption and dissolution of the CH liquid, gas diffusion, and evaporation. Then, the model is used to study the changes in soil temperature and soil CH concentration during MIP test, as well as the influences of soil CH concentration and soil properties (initial water saturation, soil intrinsic permeability, and thermal properties) on MIP response. Finally, a simplified MIP interpretation model is developed based on parametric analysis results and verified against field and laboratory test data. It is found that the soil CH concentration, rather than soil properties, dominates the MIP response. The simplified interpretation model can deliver practical prediction of the CH concentration through the detected results by MIP, which may improve the applicability of MIP.

中文翻译：

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膜界面探针检测氯化烃影响因素的理论评估及应用


膜界面探针 (MIP) 是一种高效、经济的氯化烃 (CH) 污染现场调查工具。鉴于目前对MIP试验的解释仅限于定性水平，首先提出了考虑多相流和多场耦合的理论模型来模拟MIP试验过程。该模型可以考虑相变、膜效应、CH液体的吸附和溶解、气体扩散和蒸发。然后，利用该模型研究MIP试验过程中土壤温度和土壤CH浓度的变化，以及土壤CH浓度和土壤性质（初始含水饱和度、土壤固有渗透率和热性质）对MIP响应的影响。最后，根据参数分析结果开发了简化的 MIP 解释模型，并根据现场和实验室测试数据进行了验证。研究发现，土壤 CH 浓度而非土壤性质主导 MIP 响应。简化的解释模型可以通过MIP的检测结果对CH浓度进行实际预测，这可以提高MIP的适用性。