Environmental Pollution, Sept, 2012, Vol.168, p.96(11)
To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.envpol.2012.04.016 Byline: Markus Wehrer (a)(b), Philipp Jaesche (c), Kai Uwe Totsche (a) Abstract: A quantitative knowledge of the fate of deicing chemicals in the subsurface can be provided by joint analysis of lab experiments with numerical simulation models. In the present study, published experimental data of microbial degradation of the deicing chemical propylene glycol (PG) under flow conditions in soil columns were simulated inversely to receive the parameters of degradation. We evaluated different scenarios of an advection-dispersion model including different terms for degradation, such as zero order, first order and inclusion of a growing and decaying biomass for their ability to explain the data. The general break-through behavior of propylene glycol in soil columns can be simulated well using a coupled model of solute transport and degradation with growth and decay of biomass. The susceptibility of the model to non-unique solutions was investigated using systematical forward and inverse simulations. We found that the model tends to equifinal solutions under certain conditions. Author Affiliation: (a) Institute of Geosciences, Friedrich Schiller University of Jena, Burgweg 11, 07743 Jena, Germany (b) Department of Earth and Environmental Sciences, Rutgers, The State University of New Jersey, Smith Hall Room 136, 101 Warren Street, Newark, NJ 07102, United States (c) Weizbuhl 19, 95497 Goldkronach, Germany Article History: Received 9 November 2011; Revised 6 April 2012; Accepted 9 April 2012
Propylene -- Models ; Propylene -- Analysis ; Propylene Glycol -- Models ; Propylene Glycol -- Analysis
Cengage Learning, Inc.