Crude oil products are among the most common pollutants of soils which can drastically affect the engineering properties of soils. In the current study, a series of laboratory tests were conducted to investigate the interaction between crude oil and sandy soil with clay and the effect of crude oil, crude oil residence time, absorbent additives type and content, microwave power, specimen weight, maximum grain size and fine grain fraction on the removal efficiency of pollution through microwave radiation to extract optimum values for potential and high efficiency in hydrocarbon removal. The present study also investigated geotechnical properties, including cohesion, internal friction angle, shear strength in three conditions before and during pollution and after cleanup utilizing direct shear and static triaxial tests. The results showed that the presence of clay particles, oil content and saturation effect in the soil could significantly control the engineering soil behavior. In the presence of 4% crude oil in direct shear tests, the whole oil content is accumulated on clay particles due to the high specific area of clay particles, reducing the cohesion and the internal friction angle. By contrast, beyond the 4% of crude oil, sand particle in the soil was the controlling factor of the whole behavior of the mixture. In triaxial tests, the trend of soil parameters is almost similar to direct shear tests by increasing crude oil, except that, with an increase of 4% of oil, the friction angle of the soil increases due to the presence of a large number of flocculated clay particles.

原油产品是土壤中最常见的污染物之一，可极大地影响土壤的工程特性。在目前的研究中，进行了一系列实验室试验，研究了原油和砂土与粘土的相互作用以及原油、原油停留时间、吸收剂类型和含量、微波功率、试样重量、最大颗粒度等因素的影响。粒度和细颗粒分数对通过微波辐射去除污染的效率的影响，以提取碳氢化合物去除潜力和高效率的最佳值。本研究还利用直接剪切和静力研究了污染前后和清理后三种条件下的土工特性，包括内聚力、内摩擦角、剪切强度。三轴试验。结果表明，土壤中粘土颗粒的存在、含油量和饱和效应可以显着控制工程土的行为。在直接剪切试验中存在 4% 原油的情况下，由于粘土颗粒的高比面积，全部油含量都聚集在粘土颗粒上，从而降低了内聚力和内摩擦角。相比之下，超过4%的原油，土壤中的沙粒是混合物整体行为的控制因素。在三轴试验中，土体参数的变化趋势几乎与增加原油的直剪试验相似，只是随着原油的增加4%，由于大量絮凝物的存在，土体的摩擦角增大。粘土颗粒。