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

Khodary, Safia M.; Negm, Abdelazim; Tawfik, Ahmed

doi:10.1007/s12517-017-3372-7

Cited by 36 publications

(15 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lowest value of DD for sandy clay (SC) texture at 1.5 m depth for Isolu CS agrees with finding of Khodary et al (2018) who reported that DD of clayey soil is highly affected by oil contamination when compared to sandy soil.…”

Section: Geotechnical Propertiessupporting

confidence: 88%

Assessment of geotechnical and physico-chemical properties of age-long greywater-contaminated soils in basement complex areas, southwest Nigeria

2020

View full text Add to dashboard Cite

Bathroom-rich greywater coming directly in contact with virgin soil for years contaminates soil and alters its properties. The degree of alteration of soil properties may also depend on geological settings from which the soil was formed. The present study was designed to investigate the physico-chemical and geotechnical properties of greywater-contaminated soil (GCS) in different soils of basement complex formation. Soil samples were collected from greywater discharge zones and control soil (CS) in two locations (Mapo in Ibadan, Oyo State and Isolu in Abeokuta, Ogun State, Nigeria) at the depths of 0.5, 1.0 and 1.5 m from the surface, and the soil properties were analysed following standard procedures in the laboratory. The experiment consists of two modes: CS with no presence of greywater and GCS. The results of this study showed that alteration of most analysed properties depends greatly on sampling depth. There is increased in soil pH, cation exchange capacity, dry density (DD), saturated hydraulic conductivity (K sat) and shear strength (SS) in GCS at Mapo over their control values, while porosity, Atterberg limits (ALs), plasticity index and moisture content (MC) were reduced relative to the CS at all sampling depths. However, only bearing ratio improved at each sampling depth in GCS at Isolu, while alterations in other analysed properties did not follow clear trend. Correlation coefficient showed positive correlation between % clay and AL, porosity and ALs; MC and ALs at 1% level, while negative correlation exists between DD and ALs, % sand and ALs as well as K sat and ALs at the two locations. Two-way ANOVA showed that there is a significant difference at 5% level (p < 0.05) based on sampling depths for most analysed properties except SS, organic matter and soil resistivity. Further investigation is needed to study the trend of alteration of soil properties with depth on GCS at other soil types and geological formations.

show abstract

Section: Geotechnical Propertiessupporting

confidence: 88%

Assessment of geotechnical and physico-chemical properties of age-long greywater-contaminated soils in basement complex areas, southwest Nigeria

2020

View full text Add to dashboard Cite

show abstract

“…With an increase in urbanization and industrialization, the acidic and alkaline wastewater produced by factory enterprises change the physical and mechanical properties of the soil [20][21][22]. Chemical wastewater from industries infiltrates into the soil, thereby causing serious pollution.…”

Section: Introductionmentioning

confidence: 99%

Influence of Acidic Substances on Compression Deformation Characteristics of Loess

Tang

Liu

Wang

et al. 2021

Advances in Civil Engineering

View full text Add to dashboard Cite

Current research theories on acid-contaminated soils indicate that acids can alter the physical properties of soils, which in turn can affect their engineering mechanical properties. However, compressibility, one of the most important mechanical properties of loess, may be affected by acidic substances. To investigate the influence of acid on the compression properties of loess, this study uses a uniaxial compressor to investigate the changes of compression properties of loess under different acid concentrations and different acid immersion times and attempts to predict the causes of macroscopic compressibility changes from the microscopic pore changes of acid-etched loess. The test results show that when the soaking time is the same, the hydrochloric acid concentration increases from 0 to 3.0 mol/L, the compression coefficient Cc increases by 43.20–87.5%, and the compression yield stress σpc decreases by 51.36–60.86%; when the concentration of hydrochloric acid is the same, the soaking time increases from 1 day to 12 days, the compression coefficient Cc increases by 119.05–197.46%, and compressive yield stress σpc decreases by 10.67–22.02%. The microscopic images of loess soaked for 12 days at 3.0 mol/L hydrochloric acid concentration were compared with those of the original loess. The percentages of micropore, small pore, mesopore, and macropore areas of original loess were 20.90%, 79.10%, 0%, and 0%, respectively. The percentages of micropore, small pore, mesopore, and macropore areas of acid-etched loess were 6.24%, 37.21%, 1.14%, and 55.40%, respectively. The enhancement of the compressive properties of acid-etched loess is the result of the coupling of acid concentration and soaking time, and the change of macroscopic compressive properties may be related to the increase of microscopic macropore area after acid erosion. The results of this study can be used as a reference for the study of soil mechanical properties in acid-contaminated soils.

show abstract

“…Engineered landfills are among the most common and frequently used methods for the disposal of municipal solid waste (MSW) due to their simplicity, reliability, and costeffectiveness [1][2][3]. Nonetheless, due to three major bioprocesses (hydrolysis, aerobic, and anaerobic degradation), a large amount of leachate with high concentrations of ammonia, heavy metals, organic and inorganic compounds that are harmful to the environment and human health are generated in landfills [4,5].…”

Section: Introductionmentioning

confidence: 99%

CO2 Carbonation of Olivine-Admixed Marine Clay: Suitability for Bottom Liner Application

et al. 2021

View full text Add to dashboard Cite

This paper focuses on employing an optimization approach in evaluating the hydraulic conductivity (HC) of CO2-carbonated olivine-admixed marine clay for possible utilization as a hydraulic barrier in engineered landfills to minimize leachate migration. The attainable region technique was used to optimize the olivine particle size during the grinding process before treating the soil, while the response surface methodology was used in designing the experiments, evaluating the results, and optimizing the variables responsible for reducing the HC of the CO2-carbonated olivine-treated clay. The effects of the control factors (olivine content, carbonation time, and carbonation pressure) on the response (HC) were studied by variance analysis. The factors and the response were related by a developed regression model. Predicted values from the model were in concurrence with their experimental counterparts. The results show that the HC of the CO2-carbonated olivine-treated clay samples met the Malaysian regulatory specification of ≤10−8 m/s for liner utilization. The optimum conditions were 24.7% olivine content, 20.1 h carbonation time, and 161 kPa carbonation pressure, which decreased the HC by approximately 98%. CO2-carbonation and olivine blend proved to be a sustainable technique to reduce the clay’s HC for possible application as a liner material in engineered landfills.

show abstract

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

Cited by 36 publications

References 54 publications

Assessment of geotechnical and physico-chemical properties of age-long greywater-contaminated soils in basement complex areas, southwest Nigeria

Assessment of geotechnical and physico-chemical properties of age-long greywater-contaminated soils in basement complex areas, southwest Nigeria

Influence of Acidic Substances on Compression Deformation Characteristics of Loess

CO2 Carbonation of Olivine-Admixed Marine Clay: Suitability for Bottom Liner Application

Contact Info

Product

Resources

About