Diffusive Transport of Phenolic Compounds Through Two Coextruded Geomembranes

Touze-Foltz, Nathalie; Mendes, M.; Barral, Camille; Mazéas, Laurent

doi:10.1007/s40891-015-0028-0

Cited by 2 publications

(2 citation statements)

References 53 publications

(69 reference statements)

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“…The walls of each bag were modeled as trilayer materials including a central EVOH layer (see Table 6) and by neglecting tie layers. As EVOH is known to be partly a barrier to organic vapors with diffusion coefficients of dry EVOH 10 to 30 times lower than in LDPE [82,83,84,85], factor thirty was applied as an acceptable estimate. Contacts took place, indeed, in dry conditions as the relative humidity (RH) of the air in the bags ca.…”

Section: Resultsmentioning

confidence: 99%

The Ubiquitous Issue of Cross-Mass Transfer: Applications to Single-Use Systems

Nguyên

Dorey²,

Vitrac

2019

Molecules

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The leaching of chemicals by materials has been integrated into risk management procedures of many sectors where hygiene and safety are important, including food, medical, pharmaceutical, and biotechnological applications. The approaches focus on direct contact and do not usually address the risk of cross-mass transfer of chemicals from one item or object to another and finally to the contacting phase (e.g., culture medium, biological fluids). Overpackaging systems, as well as secondary or ternary containers, are potentially large reservoirs of non-intentionally added substances (NIAS), which can affect the final risk of contamination. This study provides a comprehensive description of the cross-mass transfer phenomena for single-use bags along the chain of value and the methodology to evaluate them numerically on laminated and assembled systems. The methodology is validated on the risk of migration i) of ϵ-caprolactam originating from the polyamide 6 internal layer of the overpackaging and ii) of nine surrogate migrants with various volatilities and polarities. The effects of imperfect contacts between items and of an air gap between them are particularly discussed and interpreted as a cutoff distance depending on the considered substance. A probabilistic description is suggested to define conservative safety-margins required to manage cross-contamination and NIAS in routine.

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Section: Resultsmentioning

confidence: 99%

The Ubiquitous Issue of Cross-Mass Transfer: Applications to Single-Use Systems

Nguyên

Dorey²,

Vitrac

2019

Molecules

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“…Previous studies have investigated the diffusive resistance of geomembranes to inorganics (Müller et al 1998;) and, more recently, organics (Sangam and Rowe 2001;McWatters andRowe 2009, 2014;Touze-Foltz et al 2015). This study examined PCB diffusion with respect to a 1.5 mm thick HDPE geomembrane (Solmax International) commonly used in landfill liners.…”

Section: Materials Testedmentioning

confidence: 99%

Polychlorinated biphenyl diffusion through HDPE geomembrane

Rowe

Jones

Rutter

2016

Geosynthetics International

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Experiments conducted to evaluate the partitioning coefficient from aqueous solution into and out of high-density polyethylene geomembrane, as well as the diffusion coefficient through the geomembrane are reported. The best estimate partitioning coefficient (S gf ) is about 150 000 with an upper-bound estimate of 325 000. The best estimate diffusion coefficient (D g ) is 1.0 × 10 −14 m 2 /s, with lower and upper bounds of 0.5 × 10 −14 and 5 × 10 −14 , respectively. Using the diffusive properties obtained from the above experiments, the potential impacts on an aquifer of the migration of polychlorinated biphenyls and chloride are compared for a composite liner in a hypothetical municipal solid waste landfill. It is shown that, with good construction quality assurance to limit the number of holes and length of covered wrinkles to acceptably low values, a modern composite liner limited the impact of polychlorinated biphenyls on the aquifer concentration to well below regulatory limits.

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Diffusive Transport of Phenolic Compounds Through Two Coextruded Geomembranes

Cited by 2 publications

References 53 publications

The Ubiquitous Issue of Cross-Mass Transfer: Applications to Single-Use Systems

The Ubiquitous Issue of Cross-Mass Transfer: Applications to Single-Use Systems

Polychlorinated biphenyl diffusion through HDPE geomembrane

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