Tropical residual soil as compacted soil liners

Taha, Mohd Raihan; Kabir, Md. Humayun

doi:10.1007/s00254-004-1160-7

Cited by 45 publications

(22 citation statements)

References 15 publications

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“…The liner is the most important element of a waste disposal landfill, since it acts as a barrier to prevent or minimise the migration of pollutants into the environment from the landfill [34]. Hydraulic conductivity is probably the most significant factor affecting the performance of a compacted liner [35,36].…”

Section: Introductionmentioning

confidence: 99%

Assessment of bauxite refining residue (red mud) as a liner for waste disposal facilities

Rubinos

Spagnoli²,

Barral

2013

International Journal of Mining, Reclamation and Environment

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Red mud (RM), a waste arising from the bauxite refining, was studied to assess its suitability as a compacted liner material. The geotechnical and hydraulic conductivity (K) characteristics of the RM, as well as the effect of desiccation, were evaluated. RM has index properties satisfying the requirements to achieve low K. The compaction-permeability studies showed that RM may be compacted to a dense homogeneous mass using a moderate compactive effort, while lowest K (61 Â 10 À7 cm/s) was achieved for RM compacted slightly (0.4-4%) wet of optimum. Shear strength test revealed high values of friction angle and cohesion for compacted RM, and its tight structure was also evidenced by its low compressibility and maximum settlement under load. Desiccation adversely affected the permeability of compacted RM, but to a lesser extent than generally observed for clays. These results suggest that RM could be potentially utilised as a low-permeability barrier to be laid down under engineered landfill sites.

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Section: Introductionmentioning

confidence: 99%

Assessment of bauxite refining residue (red mud) as a liner for waste disposal facilities

Rubinos

Spagnoli²,

Barral

2013

International Journal of Mining, Reclamation and Environment

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“…The shrinkage limit (Atterberg limit) of the soil found 20.67% from the laboratory test. This high shrinkage limit (12% or more) value of the clay soil will reduce the shrinkage potential during the dry season and thereby minimizing the undesirable desiccation crack within the clay liner [25], [26]. The activity (the ratio of PI to the percent by weight of soil particles of diameter smaller than 0.002 mm) of the soil is about 0.35.…”

Section: A Soil Qualitymentioning

confidence: 97%

“…High swelling clays suffer from differential settlements and crack on drying. The cracks on liner surface leads to migration of contaminants into the soils and groundwater and thereby hampering the desired functions of liner systems [26], [34]. Therefore, the present soil with low swelling potential are found suitable for the construction of liners in containment structures.…”

Section: Swelling Potentialmentioning

confidence: 99%

“…However, literatures depict that soil with following index properties: percentage of clay (fraction smaller than 0.002 mm)≥20 to 25 %, percentage of fines (fraction smaller than 0.075 mm)≥50 %, plasticity index (PI)≥12 to 15 % and activity≥0.3 may be considered as landfill liner materials in waste containment structures [26], [29], [30]. Based on the above criteria, it is observed that the studied soil complied the standards and requirements for using as landfill liner material.…”

Section: A Soil Qualitymentioning

confidence: 99%

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Potential of Silty Clay Soil as an Attenuation Material for Containment of Phenolic Wastewater Outfall Site

Pal¹,

Adhikari²,

Mukherjee³

et al. 2015

IJESD

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Abstract-Use of compacted silty clay soil collected from the Gangetic river sediment near Kolkata, West Bengal, India has been experimentally explored in the laboratory as a low cost landfill liner material for retarding the migration of phenolic compounds releasing from a coke oven wastewater outfall site in Durgapur, West Bengal, India. The phenol concentration in the wastewater was found in the range of 4.0-12.0 mg/L in different times of a calendar year. Batch adsorption results reveal that the maximum phenol removal efficiency of 95% was achieved at an initial phenol concentration of 4 mg/L for the soil dose of 20 g/L, solution pH of 6.0 and after a reaction time of 24 h. Index properties, swelling potential, compaction characteristics and permeability of the soil indicate that it is low compressible, moderately expansive and low permeable (1.90×10 -8 cm/s) and having reasonably good phenol attenuation capacity (472.5 mg/g). These favorable findings suggest that the compacted clay soil can be potentially utilized as primary landfill liner material for containment of phenolic waste generated from coke oven wastewater.

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“…The silty clay was firstly compacted in 5-cm-thick sublayers outside the box, and then transferred into the box. The controlling gravimetric water content of the compacted silty clay was 17.8% (?2% of optimum water content) to achieve a low hydraulic conductivity (Mitchell et al 1965;Daniel and Benson 1990;Taha and Kabir 2005). The details of the installation of the soils are described elsewhere (Song and Yanful 2009a).…”

Section: Experimental Unit and Installation Of Soilsmentioning

confidence: 99%

Laboratory and numerical modeling of water balance in a layered sloped soil cover with channel flow pathway over mine waste rock

Qin

Yanful

2010

Environ Earth Sci

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Macropores developed in barrier layers in soil covers overlying acid-generating waste rock may produce preferential flow through the barrier layers and compromise cover performance. However, little has been published on the effects of preferential flow on water balance in soil covers. In the current study, an inclined, layered soil cover with a 10-cm-wide sand-filled channel pathway in a silty clay barrier layer was built over reactive waste rock in the laboratory. The channel or preferential flow pathway represented the aggregate of cracks or fissures that may occur in the barrier during compaction and/or climateinduced deterioration. Precipitation, runoff, interflow, percolation, and water content were recorded during the test. A commercial software VADOSE/W was used to simulate the measured water balance and to conduct further sensitivity analysis on the effects of the location of the channel and the saturated hydraulic conductivity of the channel material on water balance. The maximum percolation, 80.1% of the total precipitation, was obtained when the distance between the mid-point of the channel pathway and the highest point on the slope accounted for 71% of the total horizontal length of the soil cover. The modeled percolation increased steadily with an increase in the hydraulic conductivity of the channel material. Percolation was found to be sensitive to the location of the channel and the saturated hydraulic conductivity of the channel material, confirming that proper cover design and construction should aim at minimizing the development of vertical preferential flow in barrier layers. The sum of percolation and interflow was relatively constant when the location of the channel changed along the slope, which may be helpful in locating preferential flow pathways and repairing the barrier.

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Tropical residual soil as compacted soil liners

Cited by 45 publications

References 15 publications

Assessment of bauxite refining residue (red mud) as a liner for waste disposal facilities

Assessment of bauxite refining residue (red mud) as a liner for waste disposal facilities

Potential of Silty Clay Soil as an Attenuation Material for Containment of Phenolic Wastewater Outfall Site

Laboratory and numerical modeling of water balance in a layered sloped soil cover with channel flow pathway over mine waste rock

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