Geotechnical properties of the soils contaminated with oils, landfill leachate, and fertilizers

  • Safia M. Khodary
  • Abdelazim M. Negm
  • Ahmed Tawfik


Severe modification of geotechnical properties of soils mainly occurred due to physical and/or physicochemical interactions between soil and contaminants such as oils, landfill leachate, and fertilizers. However, the degree of natural soil alteration in terms of permeability, shear strength, compaction, Atterberg limits, consolidation, and compressibility is dependent on contaminant and soil type. A sharp reduction in natural soil permeability occurred due to the migration of particle fragments of the contaminant and clogging the pores between soil particles. Nevertheless, the permeability of the contaminated soil with acidic and alkaline solutions could be increased due to the dissolution of the soil minerals. Physical and physicochemical interactions are predominant in granular and fine-grained soils, respectively. Atterberg limits of the natural soil are deteriorated due to physicochemical interaction with contaminants. Moreover, some contaminants tend to reduce the thickness of the diffuse double layer (DDL), resulting in soil shrinkage and causing a decrease in repulsive forces, thus promoting flocculation of particles.


Geotechnical properties Oil contamination Landfill leachate Fertilizers 





California bearing ratio


compression index


high plasticity clay


low plasticity clay


coefficient of consolidation


diffuse double layer


plasticity index


permeability coefficient


maximum dry density


low plasticity silt


municipal solid waste


coefficient of volume compressibility


optimum moisture content


percentage decrease


percentage increase


silty sand


poor-graded sand


well-graded sand


unconfined compressive strength


liquid limit


plastic limit


shrinkage limit


angle of internal friction



The first author would like to thank Ministry of Higher Education (MoHE) of Egypt for providing a scholarship to conduct this study as well as the Egypt-Japan University of Science and Technology (E-JUST) for offering all facilities and tools needed to this study. All authors would like to thank the reviewers for their valuable and constructive comments.


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© Saudi Society for Geosciences 2018

Authors and Affiliations

  • Safia M. Khodary
    • 1
  • Abdelazim M. Negm
    • 2
  • Ahmed Tawfik
    • 1
    • 3
  1. 1.Environmental Engineering DepartmentEgypt-Japan University of Science and Technology (E-JUST)AlexandriaEgypt
  2. 2.Faculty of EngineeringZagazig UniversityZagazigEgypt
  3. 3.Water Pollution Research DepartmentNational Research CentreGizaEgypt

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