Soil-water characteristic curves and hydraulic conductivity of nanomaterial-soil-bentonite mixtures

Taha, Omer Muhie Eldeen; Taha, Mohd Raihan

doi:10.1007/s12517-015-2038-6

Cited by 17 publications

(9 citation statements)

References 46 publications

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“…The improved performance of Oltu clay, aluminum oxide, and iron oxide in reducing permeability can be explained by the increased packing density due to their smaller size, as well as their structural properties. Results similar to those suggesting that smaller-diameter nanomaterials reduce the permeability more reported in this study dan be found in Bahmani et al [36] and Taha and Taha [37].…”

Section: Permeabilitysupporting

confidence: 92%

Investigation of the Effect of Leachate on Permeability and Heavy Metal Removal in Soils Improved with Nano Additives

Özçoban

Acarer

2022

Applied Sciences

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Soils with low permeability are widely used in solid waste landfills to prevent leakage of leachate into groundwater. By adding nanomaterials to clay soils, the permeability of the clay can be reduced as well as the retention of pollutants in the leachate. In this study, three different nanomaterials, iron oxide, aluminum oxide, and Oltu clay, were added to kaolin at two different rates (1% and 5%), and the effect of nanomaterials on permeability and heavy metal (iron, manganese, zinc, copper, and lead) removal rate was investigated. According to the experimental results, permeability decreased, and the heavy metal removal rate increased with increasing nanomaterial content in kaolin. With the addition of 5% iron oxide, 5% aluminum oxide, and 5% Oltu clay to kaolin, the average permeability decreased by 63%, 81%, and 96%, respectively. Iron (90–93%), manganese (47–75%), zinc (39–50%), copper (33–41%), and lead (36–49%) removal rates of nanomaterial-added kaolin samples were found to be higher than the removal rates of kaolin without nanomaterial addition. Oltu clay, which has the smallest size and high surface area, performed better than aluminum oxide and iron oxide in reducing the permeability of kaolin and retaining heavy metals.

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Section: Permeabilitysupporting

confidence: 92%

Investigation of the Effect of Leachate on Permeability and Heavy Metal Removal in Soils Improved with Nano Additives

Özçoban

Acarer

2022

Applied Sciences

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“…Table 2 shows the physical and engineering properties of Salak Tinggi residual soil. The result shows that the average specific gravity for Salak Tinggi residual soil is 2.67 and these values show the similarities when compared with previous studies of sedimentary residual soil [2,18,19]. The residual soil specific gravity values are varies at each location depending on the mineralogy of soil and the history of weathering at any specific site.…”

Section: Methodssupporting

confidence: 67%

Geotechnical Properties of Salak Tinggi Residual Soil-Bentonite Mixture as Liner

Khalid¹,

Mukri²,

Arshad³

et al. 2019

JMechE

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This paper intends to present an experimental study on the effectiveness of using bentonite mixed with originating sedimentary residual soil as a liner. In order to investigate the effectiveness of soil-bentonite mixture, several tests were performed on Salak Tinggi sedimentary residual soil mixed with different percentage of bentonite content such as 5%, 10% and 15%. The laboratory testing was performed on the mixed sample consist of physical properties of the soil such as: pH, plastic limit (PL), liquid limit (LL), plasticity index (PI), linear shrinkage (LS) and specific gravity (SG). Meanwhile, the compaction testing was performed such as Bristish Standard Light (BSL) and Bristish Standard Heavy (BSH). The compaction test was conducted to determine the maximum dry density (MDD) and optimum moisture content (OMC) at two different compaction energies. The result showed that the addition of bentonite on the Salak Tinggi residual soil can change and improve the physical properties of the results. Moreover, the results of compaction show a decrease in the MDD value for any increase in the percentage of bentonite mixture at all energies. However, MDD value increases with increasing of compaction energy used in soil–bentonite mixture. All these changes improved the performance of residual soil use as liner purposes.

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“…Taipodia et al (2011) reported that the hydraulic conductivity of the clay (2.41 Â 10 À5 ) decreased to 1.25 Â 10 À5 cm/s as a result of the addition of nano CaO to the clay, and this result was related to the filling of soil voids with nanoparticles (Taipodia et al 2011). Taha & Taha (2016) reported that the hydraulic conductivity decreased in general as a result of the addition of nano-alumina and nano copper to the soil samples containing 20% bentonite, and nano-alumina performed better than nano copper in terms of reducing the hydraulic conductivity (Taha & Taha 2016).…”

Section: Impermeability Methods Applied In Landfill Areasmentioning

confidence: 99%

Effect of solid waste landfill leachate contaminants on hydraulic conductivity of landfill liners

Özçoban

Acarer

Tüfekçi

2022

Water Science and Technology

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Landfilling is one of the most widely used methods to reduce the impact on the environment and human health by ensuring the management of solid wastes. For the process in question to be called landfill, the landfill leachate must be controlled and liner impermeability conditions must be provided. For this reason, compacted clay liners (CCL) and geosynthetic clay liners (GCL) with very low hydraulic conductivity are often used as hydraulic barriers in landfills to prevent the risk of leachate mixing with groundwater. However, as a result of various interactions between leachate-clay liners, changes occur in the hydraulic conductivity of the liners. In this review, the change (increase/decrease) in the hydraulic conductivity of the landfill liners caused by the contaminants in the leachate composition and the mechanisms responsible for this change were examined. In addition, deficiencies in the literature on this subject were identified and directions for future studies were presented.

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Soil-water characteristic curves and hydraulic conductivity of nanomaterial-soil-bentonite mixtures

Cited by 17 publications

References 46 publications

Investigation of the Effect of Leachate on Permeability and Heavy Metal Removal in Soils Improved with Nano Additives

Investigation of the Effect of Leachate on Permeability and Heavy Metal Removal in Soils Improved with Nano Additives

Geotechnical Properties of Salak Tinggi Residual Soil-Bentonite Mixture as Liner

Effect of solid waste landfill leachate contaminants on hydraulic conductivity of landfill liners

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