Environmental Pollution, August, 2013, Vol.179, p.301(14)
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.envpol.2013.04.029 Byline: Markus Wehrer, Juliane Mai, Sabine Attinger, Kai U. Totsche Abstract: Release of contaminants from non-aqueous phase liquids (NAPLs) is often limited by the dynamic exchange with aqueous solutions governed by a priori unknown kinetic laws. Release experiments require a thorough evaluation of the potential and limitations of kinetic models to reveal release processes. In this study, we investigated the characteristic concentration-time profiles of various models for the release of contaminants from an organic phase into an aqueous solution under no flow conditions. Criteria have been tested that allow for distinction of a first order one domain, a first order two domain, a spherical diffusion model, a spherical diffusion model with a time variable diffusion coefficient, a model for diffusion in a sphere with organic film, and a model for diffusion in a sphere with an aqueous film. The results can serve to evaluate the processes potentially governing release of organic contaminants from non-aqueous liquid phases. Author Affiliation: (a) Department of Earth and Environmental Sciences, Rutgers, The State University of New Jersey, 101 Warren Street, Newark 07102, United States (b) Lehrstuhl fur Hydrogeologie, Institut fur Geowissenschaften, Friedrich-Schiller-Universitat Jena, Burgweg 11, 07749 Jena, Germany (c) Department Computational Hydrosystems CHS, Helmholtz Centre for Environmental Research GmbH - UFZ, Permoserstra[sz]e 15, 04318 Leipzig, Germany Article History: Received 31 October 2012; Revised 13 March 2013; Accepted 15 April 2013
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