受石油及其衍生物污染的土壤是全球范围内的关键环境问题,危害生态系统并导致岩土工程问题。本文重点介绍了先前有关石油污染对土壤岩土性质影响的研究。为此,对这一主题的相关学术文献进行了调查和讨论。这项研究的结果表明,在粗粒土壤中添加油污染可显着降低颗粒表面粗糙度。另一方面,在细粒土壤中,它导致粘土颗粒的絮凝和二次聚集,土壤基质中的聚集和松散堆积较少,等轴孔的形成,裂隙状孔隙的形成,和中孔率的增加。总的来说,人们发现,石油污染土壤的岩土性质主要取决于土壤与污染物之间的物理化学和/或物理相互作用。此外,先前的研究表明,石油污染物显著改变粘性土和非粘性土的岩土性质,包括Atterberg极限,粒度分布,压实行为,无侧限抗压强度,摩擦角,凝聚力,水力传导率,和固结特征。然而,他们中的大多数人无法建立一般模式。此外,研究发现,石油污染土壤的岩土性质变化程度受土壤类型和特征的强烈影响,以及数量,type,和石油污染物的化学成分。
Soil polluted by oil and its derivatives is a critical environmental issue worldwide that jeopardizes ecological systems and causes geotechnical problems. This review paper focuses on the previous studies concerning the impacts of oil pollution on soil geotechnical properties. To this end, related academic literature on this topic was investigated and discussed. The findings of this study demonstrated that the addition of oil pollution in coarse-grained soils significantly reduces particle surface roughness. On the other hand, in fine-grained soils, it results in flocculation and secondary aggregation of clay particles, less aggregated and loose packing in the soil matrix, the formation of isometric pores, the formation of fissure-like pores, and an increase in mesoporosity. In general, it was found that the geotechnical properties of oil-polluted soils are mostly determined by the physicochemical and/or physical interactions between the soil and contaminant. Additionally, previous research has demonstrated that oil pollutants alter the geotechnical properties of cohesive and non-cohesive soils significantly, including the Atterberg limits, particle-size distribution, compaction behavior, unconfined compressive strength, friction angle, cohesion, hydraulic conductivity, and consolidation characteristics. However, no general pattern could be established for the majority of them. Besides, it was found that the degree of geotechnical property alteration of oil-polluted soil is strongly influenced by the soil type and features, as well as the quantity, type, and chemical composition of oil pollutants.