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Modeling volatile organic compound transport in composite liners / Min-Gyun Park in Journal of geotechnical and geoenvironmental engineering, Vol. 138 N° 6 (Juin 2012) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 641–657 Titre : Modeling volatile organic compound transport in composite liners Type de document : texte imprimé Auteurs : Min-Gyun Park, Auteur ; Tuncer B. Edil, Auteur ; Craig H. Benson, Auteur Année de publication : 2012 Article en page(s) : pp. 641–657 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Volatile  organic  compounds  Geomembranes  Landfills  Tansport  Composite  liners  Partition  coefficient  Diffusion  coefficient  Modeling Résumé : Data from bench-scale composite liner experiments were compared with predictions made with two models, a finite-difference model and a semianalytical model, used to predict volatile organic compound (VOC) transport through composite liners. Transport parameters for the geomembrane and clay for five common VOCs were measured independently and used as input. Predictions from both models for all five VOCs were essentially identical. Excellent agreement was obtained between the predicted and measured concentrations for all five VOCs without model calibration. However, inherent variability in measured transport parameters has a significant effect on predictions. Volatile organic compound concentrations in the clay liner near the geomembrane-clay interface depend primarily on transport parameters for the geomembrane. However, this becomes less significant as the distance from the geomembrane-clay interface increases. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000630 [article] Modeling volatile organic compound transport in composite liners [texte imprimé] / Min-Gyun Park, Auteur ; Tuncer B. Edil, Auteur ; Craig H. Benson, Auteur . - 2012 . - pp. 641–657. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 138 N° 6 (Juin 2012) . - pp. 641–657 Mots-clés : Volatile  organic  compounds  Geomembranes  Landfills  Tansport  Composite  liners  Partition  coefficient  Diffusion  coefficient  Modeling Résumé : Data from bench-scale composite liner experiments were compared with predictions made with two models, a finite-difference model and a semianalytical model, used to predict volatile organic compound (VOC) transport through composite liners. Transport parameters for the geomembrane and clay for five common VOCs were measured independently and used as input. Predictions from both models for all five VOCs were essentially identical. Excellent agreement was obtained between the predicted and measured concentrations for all five VOCs without model calibration. However, inherent variability in measured transport parameters has a significant effect on predictions. Volatile organic compound concentrations in the clay liner near the geomembrane-clay interface depend primarily on transport parameters for the geomembrane. However, this becomes less significant as the distance from the geomembrane-clay interface increases. ISSN : 1090-0241 En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29GT.1943-5606.0000630