Interaction between sorption and biodegradation processes in the contaminant transport |
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Authors: | Paula R.L. Couto Sandra M.C. Malta |
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Affiliation: | National Laboratory for Scientific Computing (LNCC/MCT), Av. Getúlio Vargas 333, 222561-070 Petrópolis, Brazil |
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Abstract: | The main goal of this work is to examine in detail the equilibrium and non-equilibrium sorption in a multiple species contaminant transport system undergoing multiplicative Monod biodegradation kinetics, which characterizes a scenario of subsurface contamination by organic contaminants. Mathematically, the problem is given by a nonlinear advection-diffusion-reaction partial differential system coupled by the reaction terms, associated with the biodegradation process. A new operator splitting approach is proposed for treating in a sequential fashion the convective-diffusive and reactive terms. A predictor-multicorrector algorithm with Newton–Raphson and stabilized finite element (streamline-upwind Petrov-Galerkin, SUPG) methods is used in the time and spatial discretizations, respectively. Numerical results illustrate the good applicability of the present approach, corroborating the well-known observation nonlinear physical and biological processes should be inserted in the model that to better predict the contamination scenarios. |
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Keywords: | Contaminant transport Nonlinear sorption conditions Multiplicative Monod biodegradation kinetics Operator splitting decomposition method |
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