Transport fate of organic compounds with water through landfills

Öman, Cecilia; Rosqvist, Håkan

doi:10.1016/s0043-1354(98)00446-1

Cited by 34 publications

(16 citation statements)

References 16 publications

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“…The tests were all run for approximately a month (in the range 26 to 45 days). Lithium has been used several times as a tracer for transport within MSW (Blakey et al, 1998;Öman and Rosqvist, 1999;Rosqvist & Bendz, 1999;Beaven et al, 2003). Its common use in MSW is explained by its relatively low cost and frequently low background concentration (Harris, 1979;Blakey et al, 1998).…”

Section: Methodsmentioning

confidence: 99%

“…Until such possible mechanisms are properly quantified and understood in this context, caution should be expressed for future experiments using lithium as a tracer (especially in-line or field experiments where it is difficult to attribute a cause for tracer loss). Further work is needed in order to fully understand this mechanism and to explain why it was not detected in batch sorption experiments (Stegemann et al, 2006;Öman and Rosqvist, 1999).…”

Section: Tracer Mass Balancementioning

confidence: 99%

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Investigating the effect of compression on solute transport through degrading municipal solid waste

et al. 2014

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The effect of applied compression on the nature of liquid flow and hence the movement of contaminants within Municipal Solid Waste was examined by means of thirteen tracer tests conducted on five separate waste samples. The conservative nature of bromide, lithium and deuterium tracers was evaluated and linked to the presence of degradation in the sample. Lithium and deuterium tracers were non-conservative in the presence of degradation, whereas the bromide remained effectively conservative under all conditions. Solute diffusion times into and out of less mobile blocks of waste were compared for each test under the assumption of dominantly dual-porosity flow. Despite the fact that hydraulic conductivity changed strongly with applied stress, the block diffusion times were found to be much less sensitive to compression. A simple conceptual model, whereby flow is dominated by sub-parallel low permeability obstructions which define predominantly horizontally aligned less mobile zones, is able to explain this result. Compression tends to narrow the gap between the obstructions, but not significantly alter the horizontal length scale. Irrespective of knowledge of the true flow pattern, these results show that simple models of solute flushing from landfill which do not include depth dependent changes in solute transport parameters are justified.

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Section: Methodsmentioning

confidence: 99%

Section: Tracer Mass Balancementioning

confidence: 99%

Investigating the effect of compression on solute transport through degrading municipal solid waste

et al. 2014

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“…Lithium has been used several times as a tracer for transport within MSW (Blakey et al, 1998;Öman and Rosqvist, 1999;Rosqvist & Bendz, 1999;Beaven et al, 2001;Beaven et al, 2003). Its common use in MSW is explained by its relatively low cost and commonly low background concentration (Harris, 1979;Blakey et al, 1998).…”

Section: Lithiummentioning

confidence: 99%

Multiple-tracer tests for contaminant transport process identification in saturated municipal solid waste

et al. 2015

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Two column tests were performed in conditions emulating vertical flow beneath the leachate table in a biologically active landfill to determine dominant transport mechanisms occurring in landfills. An improved understanding of contaminant transport process in wastes is required for developing better predictions about potential length of the long term aftercare of landfills, currently measured in timescales of centuries. Three tracers (lithium, bromide and deuterium) were used. Lithium did not behave conservatively. Given that lithium has been used extensively for tracing in landfill wastes, the tracer itself and the findings of previous tests which assume that it has behaved conservatively may need revisiting.The smaller column test could not be fitted with continuum models, probably because the volume of waste was below a representative elemental volume. Modelling compared advection-dispersion (AD), dual porosity (DP) and hybrid AD-DP models. Of these models, the DP model was found to be the most suitable. Although there is good evidence to suggest that diffusion is an important transport mechanism, the breakthrough curves of the different tracers did not differ from each other as would be predicted based

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“…Initially, simulated landfill studies (Pohland et al, 1993;Lesage et al, 1993;Deipser and Stegmann, 1994;Pohland et al, 1998;Oman and Rosqvist, 1999) provided the basis for expecting that CAHs would be biotransformed during the normal phases of landfill stabilization. These simulations indicated that such transformations would be a function of the relative age of a landfill, its construction and operational features, and the temporal and spatial prevalence of the principal reaction mechanisms.…”

Section: Case Studies For Natural Attenuationmentioning

confidence: 99%

“…Much of this problem is due to the heterogeneous nature of the disposed waste, which promotes preferential routing and short-circuiting of leachate flows (Johnson et al, 1998;McCreanor and Reinhart, 2000;Townsend et al, 1995;Oman and Rosqvist, 1999).…”

Section: -9mentioning

confidence: 99%

Impact of Landfill Closure Designs on Long-Term Natural Attenuation of Chlorinated Hydrocarbons

Hicks¹

2008

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Transport fate of organic compounds with water through landfills

Cited by 34 publications

References 16 publications

Investigating the effect of compression on solute transport through degrading municipal solid waste

Investigating the effect of compression on solute transport through degrading municipal solid waste

Multiple-tracer tests for contaminant transport process identification in saturated municipal solid waste

Impact of Landfill Closure Designs on Long-Term Natural Attenuation of Chlorinated Hydrocarbons

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