Interactions Between Soils and Laboratory Simulated Electrolyte Solution

Nayak, Sitaram; Sunil, B. M.; Shrihari, S.; Sivapullaiah, P. V.

doi:10.1007/s10706-010-9333-5

Cited by 15 publications

(5 citation statements)

References 12 publications

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“…Hydraulic conductivity values of GCLs are found to be less than 6 Â 10 À11 m/s up to ionic strength up to 100 mM, while for solutions with ionic strength !500 mM to NH 4 þ they range from 1.6 Â 10 À6 to 5.2 Â 10 À6 m/s found (Setz et al 2017). Similar results showing that hydraulic conductivity increases with increasing ion concentration have also been revealed by other researchers (Shackelford et al 2000;Jo et al 2004;Mishra et al 2009;Nayak et al 2010;Oren & Demirkiran 2015).…”

Section: Salt Solutionssupporting

confidence: 80%

“…Researchers mainly addressed two issues when examining the effect of salt solutions on the hydraulic conductivity of CCLs and GCLs. In the studies, the effect of ion concentration on hydraulic conductivity (Shackelford et al 2000;Jo et al 2004;Yilmaz et al 2008;Mishra et al 2009;Nayak et al 2010;Oren & Demirkiran 2015;Setz et al 2017;Wang et al 2019) and the effect of increases in cation valence on hydraulic conductivity (Jo et al 2004;Mishra et al 2009;Shariatmadari et al 2011;Xue et al 2012;Chen et al 2019) were investigated. In Table 2, studies in the literature on the effect of salt solutions on hydraulic conductivity are summarized.…”

Section: Salt Solutionsmentioning

confidence: 99%

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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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Section: Salt Solutionssupporting

confidence: 80%

Section: Salt Solutionsmentioning

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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“…Leachate has different chemical substances that may control its electrical conductivity which subsequently effect the interaction with soil. Study performed by Nayak et al [7]. revealed that the Atterberg limit, compaction and permeability characteristics were modified when 0.5 M NaCl was added to the studied soil in the increments between 0% and 20%.…”

Section: Introductionmentioning

confidence: 97%

Effects of leachate on geotechnical characteristics of sandy clay soil

Harun¹,

Ali²,

Rahim³

et al. 2013

AIP Conference Proceedings

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Leachate is a hazardous liquid that poses negative impacts if leaks out into environments such as soil and ground water systems. The impact of leachate on the downgraded quality in terms of chemical characteristic is more concern rather than the physical or mechanical aspect. The effect of leachate on mechanical behaviour of contaminated soil is not well established and should be investigated. This paper presents the preliminary results of the effects of leachate on the Atterberg limit, compaction and shear strength of leachate-contaminated soil. The contaminated soil samples were prepared by mixing the leachate at ratiosbetween 0% and 20% leachate contents with soil samples. Base soil used was residual soil originated from granitic rock and classified as sandy clay soil (CS). Its specific gravity ranged between 2.5 and 2.64 with clay minerals of kaolinite, muscovite and quartz. The field strength of the studied soil ranged between 156 and 207 kN/m 2 . The effects of leachate on the Atterberg limit clearly indicated by the decrease in liquid and plastic limit values with the increase in the leachate content. Compaction tests on leachate-contaminated soil caused the dropped in maximum dry density, dry and increased in optimum moisture content, w opt when the amount of leachate was increased between 0% and 20%. The results suggested that leachate contamination capable to modify some geotechnical properties of the studied residual soils.

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“…Therefore understanding the description of a flow regime in field is a tedious task. Further, a compacted clay liner, may react in different ways leading to changes in hydraulic conductivity (Nayak et al 2007, Sunil et al 2009, Nayak et al 2010). Fig.…”

Section: Construction and Hydraulic Conductivitymentioning

confidence: 99%

Review on performance of geosynthetic liners in municipal solid waste landfills

Sunil

2016

JGS Special Publication

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Considerable development has taken place in the area of geosynthetics and their applications since their first use in 1980s in the construction of safe containment of hazardous wastes. Geosynthetic clay liner (GCL) and High density polyethylene (HDPE) geomembrane (GM) liners are widely used in municipal solid waste landfills as a barrier system on the base of the landfill. Satisfactory performance of geosynthetic materials when buried under soil depends on several factors. Geosyntetic liners are subjected to degradation by variation in temperatures or settling of landfills or they will be disintegrated by leachate. Several studies on monitored landfills have shown that geosynthetic liners in municipal solid waste landfills have performed extremely well at controlling leakage in field applications for a couple of decades. However, there have also been some problems reported on the very long term performance these materials. To ensure that long-term contamination does not occur, it is important that the durability of GCL and GM is maintained over the contaminating lifespan of the landfill. Some of the factors that influence very long term performance of GCL/GM/composite liners are particle size, strength and initial water content of subgrade soil, desiccation, the effect of daily thermal cycles etc. This paper examines some of these factors and the mechanisms of performance of geosynthetic liners were reviewed in order to supply reference to the study in this field.

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Interactions Between Soils and Laboratory Simulated Electrolyte Solution

Cited by 15 publications

References 12 publications

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

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

Effects of leachate on geotechnical characteristics of sandy clay soil

Review on performance of geosynthetic liners in municipal solid waste landfills

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