Hydraulic and compaction characteristics of leachate-contaminated lateritic soil

Nayak, Sitaram; Sunil, B. M.; Shrihari, S.

doi:10.1016/j.enggeo.2007.05.002

Cited by 83 publications

(45 citation statements)

References 8 publications

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“…The increase of hydraulic conductivity of soil due to leachate addition was observed (see Table 1). (Nayak et al, 2007) These observations fully support the earlier mentioned thesis of Mitchell & Soga (2005) or Schmitz (2006) and prove increase of hydraulic conductivity of leachate treated soils. Not numerous investigations were conducted to define the influence of leachates presence on hydraulic conductivity of porous materials applied to bottom liners of municipal solid waste landfill.…”

Section: Influence Of Leachates On Water Permeabilitysupporting

confidence: 85%

“…Tests conducted by Ozcoban et al, (2006) confirmed that clay soils, under laboratory conditions show a very little increase of hydraulic conductivity after being permeated with leachate: 9.848·10 -10 m·s -1 for water vs. 10.8·10 -10 m·s -1 for leachate. The hydraulic and compaction characteristics of leachate-contaminated lateric Indian soil were presented by Nayak et al (2007). The soil was sampled at local open waste dump where municipal solid wastes were deposited without shredding and segregation.…”

Section: Influence Of Leachates On Water Permeabilitymentioning

confidence: 99%

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Hydraulic Conductivity and Landfill Construction

Stępniewski¹,

Widomski²,

Horn³

2011

Developments in Hydraulic Conductivity Research

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Section: Influence Of Leachates On Water Permeabilitysupporting

confidence: 85%

Section: Influence Of Leachates On Water Permeabilitymentioning

confidence: 99%

Hydraulic Conductivity and Landfill Construction

Stępniewski¹,

Widomski²,

Horn³

2011

Developments in Hydraulic Conductivity Research

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“…This pertains, fi rst and foremost, to porosity (reduction of layer height was observed), granularity (soil particles and fi ne grains were washed out) and permeability (liquid fl ow rate decreased slightly) (Nayak et al 2007, Zhang et al 2016. Changes of those parameters were particularly evident during the fi rst test stage.…”

Section: Discussionmentioning

confidence: 97%

“…The migration process analysis is limited mostly to convectional movement of pollutants taking into account in calculations diffusion movement (molecular diffusion and hydrodynamic dispersion) for various variants of the hydrodynamic fi eld. Introduction of biochemical, physical and chemical factors to the analysis makes the solutions so complicated that they often are unfi t for practical application (Koda et al 2009, Thornton et al 2000, Rosqvist and Destouni 2000, Nayak et al 2007, Varank et al 2011, Li et al 2012.…”

Section: Introductionmentioning

confidence: 99%

Migration of pollutants in porous soil environment

Szymański¹,

Janowska²

2016

Archives of Environmental Protection

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Abstract:Landfi ll leachate makes a potential source of ground water pollution. Municipal waste landfi ll substratum can be used for removal of pollutants from leachate. Model research was performed with use of a sand bed and artifi cially prepared leachates. Effectiveness of fi ltration in a bed of specifi c thickness was assessed based on the total solids content. Result of the model research indicated that the mass of pollutants contained in leachate fi ltered by a layer of porous soil (m f ) depends on the mass of pollutants supplied (m d ). Determined regression functions indicate agreement with empirical values of variable m′ f . The determined regression functions allow for qualitative and quantitative assessment of infl uence of the analysed independent variables (m′ d , l, ω) on values of mass of pollutants fl owing from the medium sand layer. Results of this research can be used to forecast the level of pollution of soil and underground waters lying in the zone of potential impact of municipal waste landfi ll.

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“…7). Increased HC of SMP 5 could be due to the dissolution of clay minerals by the leachate as the pore water is replaced by leachate [51]. The HC decrease for SMP 1 and 2 at all levels may be due to the growing reaction between the soil samples and leachate with reduced connected voids [74].…”

Section: Hydraulic Conductivity Of Soilsmentioning

confidence: 99%

Hydraulic conductivity and leachate removal rate of genetically different compacted clays

Oyediran

Olalusi

2017

Innov. Infrastruct. Solut.

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Genetically different clays were compacted, contaminated and cured for 21 days with natural leachate from an old active waste disposal site and subsequently remolded at both West Africa (WA) and Modified AASHTO (MA) energies of compaction. The clays were thereafter investigated with a view to understanding the effect of contamination on hydraulic conductivity and mineralogy of the clays, soil-leachate interaction, influence of the energy of compaction and rate of leachate removal with time. Clay mineralogy revealed the presence of mixed clays including Anatase, Calcite, Hematite, Kaolinite, Quartz and Illite. The presence of these mixed clay minerals confers both attenuation and containment properties on the clays and, hence, makes the soils suitable for use as barriers in landfills. Hydraulic conductivity of the undisturbed and uncontaminated clays reduced with increase in energy of compaction from WA to MA. Leachate addition resulted in varied responses from the clays attributable to the different genealogy of the soils. Furthermore, the rate of leachate removal for the soils was observed to be 3.0 9 10 -3 cm/s for SMP 1, 4.0 9 10 -3 cm/s for SMP 2 and 8.0 9 10 -2 cm/s for SMP 5. These observations from the different soils are in agreement with results recorded in terms of consistency, hydraulic conductivity, mineralogy and compaction properties. However, influence of leachate on the structure of the genetically different soils played a contributory role in alteration of their mineralogy and, hence, their hydraulic conductivity.

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Hydraulic and compaction characteristics of leachate-contaminated lateritic soil

Cited by 83 publications

References 8 publications

Hydraulic Conductivity and Landfill Construction

Hydraulic Conductivity and Landfill Construction

Migration of pollutants in porous soil environment

Hydraulic conductivity and leachate removal rate of genetically different compacted clays

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