Diffusive Transport of VOCs through LLDPE and Two Coextruded Geomembranes

McWatters, R.S.; Rowe, R. Kerry

doi:10.1061/(asce)gt.1943-5606.0000345

Cited by 67 publications

(33 citation statements)

References 29 publications

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“…Results obtained by McWaters and Rowe [25] indicate a significant reduction in mass flux through coextruded geomembranes compared with conventional LLDPE.…”

Section: Introductionmentioning

confidence: 91%

“…With its polar oxygen-hydrogen (OH) groups, EVOH has outstanding barrier properties against nonpolar gases such as oxygen, nitrogen, volatile compounds, and helium [34]. EVOH laminar typically combines a highly ordered crystalline structure interspersed with disordered amorphous regions with high resistance against diffusion of gas and solvents [25,34]. However, to the best of our knowledge, the diffusion of phenolic compounds in EVOH has not yet been studied.…”

Section: Geomembranesmentioning

confidence: 99%

“…6a-d, the data displayed regarding the diffusion of VOCs in HDPE geomembranes originate from Park and Nibras [20], Prasad et al [21], Müller et al [22], Rowe [61], Sangam and Rowe [23], Rowe et al [29], Joo et al [62,63], Nefso and Burns [58], Islam and Rowe [31], Touze-Foltz et al [59], and Park et al [24]. Data regarding the diffusion of VOCs in coextruded geomembranes originate from McWatters and Rowe [25] and Eun et al [27]. The diffusion of phenolic compounds through a 2-mmthick HDPE geomembrane was quantified by Touze-Foltz et al [32] and by Mendes et al [33] for 0.3-mm-thick HDPE films.…”

Section: Influence Of N-octanol-water Partition Coefficientmentioning

confidence: 99%

“…The resulting permeation coefficients thus range from 2 9 10 -12 to 6 9 10 -12 m 2 /s for the coextruded geomembrane. Thus, a coextruded geomembrane offers a five-to 12-fold decrease in the permeation coefficient compared with a 2.0-mmthick HDPE geomembrane [25].…”

Section: Introductionmentioning

confidence: 99%

“…A number of studies regarding the use of geomembranes focused on the diffusion of sodium chloride [19] or volatile organic compounds (VOCs) in virgin high-density polyethylene (HDPE) geomembranes [20][21][22][23][24], virgin polyvinyl chloride (PVC) [25], linear low-density polyethylene (LLDPE) [25], LLDPE with a co-extruded ethylene vinylalcohol (EVOH) inner core [25][26][27], fluorinated HDPE geomembranes [28], and aged HDPE geomembranes [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Diffusive Transport of Phenolic Compounds Through Two Coextruded Geomembranes

Touze-Foltz¹,

Mendes²,

Barral³

et al. 2015

Int. J. of Geosynth. and Ground Eng.

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This paper presents experimental results of a study of the diffusion of phenolic compounds through two High density polyethylene geomembranes (1 and 1.5 mm thick) with a coextruded ethylene vinyl-alcohol (EVOH) inner core. The partition and diffusion coefficients were quantified for 2,4,6-tricholophenol (2,4,6-TCP), 2,3,5,6-tetrachlorophenol (2,3,5,6 TeCP), and pentachlorophenol, which are known to be toxic even at very low concentrations. The concentration dynamics in the source and receptor chambers of the diffusion cells was interpreted with the help of the numerical code POLLUTE. For partition coefficients greater than those obtained under the same conditions for a high-density polyethylene (HDPE) geomembrane, the diffusion coefficients are smaller than those for the same HDPE geomembrane. As a result, the permeation coefficient of the two coextruded geomembranes is the same order of magnitude as that of a 2-mm-thick HDPE geomembrane. Therefore, in contrast to the case for volatile organic compounds, the EVOH inner core brings no significant improvement. These results are compared to those previously obtained with volatile organic compounds for HDPE geomembranes and coextruded geomembranes.

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“…Results obtained by McWaters and Rowe [25] indicate a significant reduction in mass flux through coextruded geomembranes compared with conventional LLDPE.…”

Section: Introductionmentioning

confidence: 91%

Section: Geomembranesmentioning

confidence: 99%

Section: Influence Of N-octanol-water Partition Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Diffusive Transport of Phenolic Compounds Through Two Coextruded Geomembranes

Touze-Foltz¹,

Mendes²,

Barral³

et al. 2015

Int. J. of Geosynth. and Ground Eng.

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An analytical model for vapor‐phase volatile organic compound diffusion through landfill composite covers

Xie

Yan

Thomas

et al. 2016

Num Anal Meth Geomechanics

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Summary One‐dimensional mathematical models for vapor‐phase volatile organic compound (VOC) diffusion through composite cover barriers are presented. An analytical solution to the model was obtained by the method of separation of variables. The results obtained by the proposed solution agree well with those obtained by a numerical analysis. Based on the proposed analytical model, the VOC breakthrough curves of five different composite covers are compared. The effects of degree of saturation of geosynthetic clay liner (GCL) or compacted clay liner (CCL) on VOC migration in the composite covers are then presented. Results show that the composite cover barriers provide much better diffusion barriers for VOC than the single CCL. The top surface steady‐state flux for a composite barrier, consisting of a 1.5 mm geomembrane (GM) and a 20 cm CCL, can be 8.3 times lower than that for a 30 cm CCL. The surface steady‐state flux for the case with (1.5 mm GM + 6 mm GCL) was found to be 2.3 times lower than that for the case with (1.5 mm GM + 20 cm CCL). The degree of saturation Sr of the CCL has a great influence on VOC migration in composite covers when Sr is larger than 0.5. The steady‐state flux at the surface of GM for the case with Sr = 0.7 can be 1.8 times lower than that for the case with Sr = 0.2. The proposed analytical model is relatively simple and can be used for verification of complicated numerical models, analysis of experimental data and performance assessment of composite cover barriers. Copyright © 2016 John Wiley & Sons, Ltd.

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Effect of retardation and capillarity on organic contaminant diffusion through an unsaturated composite liner: An analytical approach

Liu

Chen

et al. 2023

Num Anal Meth Geomechanics

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In unsaturated composite liners, the heterogeneous distribution of water content and capillarity are common phenomena with remarkable influence on the transport parameters. This study presents an analytical solution to assess the effect of unsaturation-dependent retardation and capillarity on the organic contaminant diffusion through an unsaturated composite liner. The solution is obtained by the generalized integral transform technique and is verified against other analytical and numerical solutions. Particular attention is paid to the potential errors in predicting organic contaminant transport caused by unsaturationindependent retardation factor assumption. The results show that neglecting saturation-dependent retardation may cause considerable errors. The considerations of capillary fringe and degradation also have significant effects on the errors. In addition, a simplified solution based on a new averaged retardation factor is proposed and its performance is evaluated.

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Diffusive Transport of VOCs through LLDPE and Two Coextruded Geomembranes

Cited by 67 publications

References 29 publications

Diffusive Transport of Phenolic Compounds Through Two Coextruded Geomembranes

Diffusive Transport of Phenolic Compounds Through Two Coextruded Geomembranes

An analytical model for vapor‐phase volatile organic compound diffusion through landfill composite covers

Effect of retardation and capillarity on organic contaminant diffusion through an unsaturated composite liner: An analytical approach

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