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Jan Schaerlaekens

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Papers by Jan Schaerlaekens

Research paper thumbnail of Numerieke analyse van transport en degradatie van gehalogeneerde koolwaterstoffen in poreuze media

Available from KULeuven, Campusbib. Exacte Wetenschappen, Celestijnenlaan 300A, 3001 Heverlee, Be... more Available from KULeuven, Campusbib. Exacte Wetenschappen, Celestijnenlaan 300A, 3001 Heverlee, Belgium / UCL - Université Catholique de LouvainSIGLEBEBelgiu

Research paper thumbnail of A multi-objective optimization framework for surfactant-enhanced remediation of DNAPL contaminations

Journal of Contaminant Hydrology, 2006

Research paper thumbnail of Energy Performance of Buildings: R&D policy of the regions in Belgium

Research paper thumbnail of Analysis of The Impact of The Spatial Resolution of The Initial Dnapl Saturation On The Simulation of Organic Concentrations

Research paper thumbnail of Surfactant enhanced solubilization of residual trichloroethene: An experimental and numerical analysis

Journal of Contaminant Hydrology

Research paper thumbnail of Multi objective optimization of the setup of a surfactant-enhanced DNAPL remediation

Environmental science & technology, 2005

Surfactant-enhanced aquifer remediation (SEAR) is widely considered a promising technique to reme... more Surfactant-enhanced aquifer remediation (SEAR) is widely considered a promising technique to remediate dense nonaqueous phase liquid (DNAPL) contaminations in-situ. The costs of a SEAR remediation are important and depend mostly on the setup of the remediation. Costs can be associated with the installation of injection and extraction wells, the required time of the remediation (and thus labor costs, lease of installations, and energy), the extracted water volume (the purification of the extracted water), and the injected surfactant amount. A cost-effective design of the remediation setup allows an optimal use of resources. In this work, a SEAR remediation was simulated for a hypothetical typical DNAPL contamination. A constrained multi-objective optimization of the model was applied to obtain a Pareto set of optimal remediation strategies with different weights for the two objectives of the remediation: (i) the maximal removal of DNAPL mass (ii) with a minimal total cost. A relative...

Research paper thumbnail of Surfactant enhanced solubilization of residual trichloroethene: an experimental and numerical analysis

Research paper thumbnail of Effect of scale and dimensionality on the surfactant-enhanced solubilization of a residual DNAPL contamination

Journal of Contaminant Hydrology, 2004

The mass transfer rate from residual dense non-aqueous phase liquids (DNAPLs) to the mobile aqueo... more The mass transfer rate from residual dense non-aqueous phase liquids (DNAPLs) to the mobile aqueous phase is an important parameter for the efficiency of surfactant-enhanced remediation through solubilization of this type of contamination. The mass transfer kinetics are highly dependent on the dimensionality of the system. In this study, irregularly shaped residual TCE saturations in two-dimensional saturated flow fields were flushed with a 2% polyoxyethylene sorbitan (20) monooleate (POESMO) solution until complete removal had been achieved. A numerical model was developed and used for the simulation of the various surfactant-flushing experiments with different initial saturation patterns and flow rates. Through optimization against in situ concentration and saturation data, a phenomenological power-law model for the relationship between the mass transfer rate from the DNAPL to the mobile aqueous phase on the one hand and the residual DNAPL saturation and the flow velocity on the other hand was derived. The obtained mass transfer rate parameters provide a reasonable fit to the experimental data, predicting the cleanup time and the general saturation and concentration pattern quite well but failing to predict the concentration curves at every individual sampling port. The obtained mass transfer rate model gives smaller values for the predicted mass transfer rate but shows a comparable dependence on water flow and saturation as in earlier published one-dimensional column experiments with identical characteristics for porous medium, DNAPL and surfactant. Mass transfer rate predictions were about one order of magnitude lower in the 2-D flow cell experiment than in 1-D column experiments. These results give an indication for the importance of dimensionality during surfactant remediation.

Research paper thumbnail of Surfactant enhanced solubilization of residual trichloroethene: an experimental and numerical analysis

Journal of Contaminant Hydrology, 2000

Research paper thumbnail of Numerical simulation of transport and sequential biodegradation of chlorinated aliphatic hydrocarbons using CHAIN_2D

Hydrological Processes, 1999

Research paper thumbnail of Multi-Objective Optimization of the Setup of a Surfactant-Enhanced DNAPL Remediation

Environmental Science & Technology, 2005

Research paper thumbnail of A multi-objective optimization framework for surfactant-enhanced remediation of DNAPL contaminations

Journal of Contaminant Hydrology, 2006

Research paper thumbnail of Numerieke analyse van transport en degradatie van gehalogeneerde koolwaterstoffen in poreuze media

Available from KULeuven, Campusbib. Exacte Wetenschappen, Celestijnenlaan 300A, 3001 Heverlee, Be... more Available from KULeuven, Campusbib. Exacte Wetenschappen, Celestijnenlaan 300A, 3001 Heverlee, Belgium / UCL - Université Catholique de LouvainSIGLEBEBelgiu

Research paper thumbnail of A multi-objective optimization framework for surfactant-enhanced remediation of DNAPL contaminations

Journal of Contaminant Hydrology, 2006

Research paper thumbnail of Energy Performance of Buildings: R&D policy of the regions in Belgium

Research paper thumbnail of Analysis of The Impact of The Spatial Resolution of The Initial Dnapl Saturation On The Simulation of Organic Concentrations

Research paper thumbnail of Surfactant enhanced solubilization of residual trichloroethene: An experimental and numerical analysis

Journal of Contaminant Hydrology

Research paper thumbnail of Multi objective optimization of the setup of a surfactant-enhanced DNAPL remediation

Environmental science & technology, 2005

Surfactant-enhanced aquifer remediation (SEAR) is widely considered a promising technique to reme... more Surfactant-enhanced aquifer remediation (SEAR) is widely considered a promising technique to remediate dense nonaqueous phase liquid (DNAPL) contaminations in-situ. The costs of a SEAR remediation are important and depend mostly on the setup of the remediation. Costs can be associated with the installation of injection and extraction wells, the required time of the remediation (and thus labor costs, lease of installations, and energy), the extracted water volume (the purification of the extracted water), and the injected surfactant amount. A cost-effective design of the remediation setup allows an optimal use of resources. In this work, a SEAR remediation was simulated for a hypothetical typical DNAPL contamination. A constrained multi-objective optimization of the model was applied to obtain a Pareto set of optimal remediation strategies with different weights for the two objectives of the remediation: (i) the maximal removal of DNAPL mass (ii) with a minimal total cost. A relative...

Research paper thumbnail of Surfactant enhanced solubilization of residual trichloroethene: an experimental and numerical analysis

Research paper thumbnail of Effect of scale and dimensionality on the surfactant-enhanced solubilization of a residual DNAPL contamination

Journal of Contaminant Hydrology, 2004

The mass transfer rate from residual dense non-aqueous phase liquids (DNAPLs) to the mobile aqueo... more The mass transfer rate from residual dense non-aqueous phase liquids (DNAPLs) to the mobile aqueous phase is an important parameter for the efficiency of surfactant-enhanced remediation through solubilization of this type of contamination. The mass transfer kinetics are highly dependent on the dimensionality of the system. In this study, irregularly shaped residual TCE saturations in two-dimensional saturated flow fields were flushed with a 2% polyoxyethylene sorbitan (20) monooleate (POESMO) solution until complete removal had been achieved. A numerical model was developed and used for the simulation of the various surfactant-flushing experiments with different initial saturation patterns and flow rates. Through optimization against in situ concentration and saturation data, a phenomenological power-law model for the relationship between the mass transfer rate from the DNAPL to the mobile aqueous phase on the one hand and the residual DNAPL saturation and the flow velocity on the other hand was derived. The obtained mass transfer rate parameters provide a reasonable fit to the experimental data, predicting the cleanup time and the general saturation and concentration pattern quite well but failing to predict the concentration curves at every individual sampling port. The obtained mass transfer rate model gives smaller values for the predicted mass transfer rate but shows a comparable dependence on water flow and saturation as in earlier published one-dimensional column experiments with identical characteristics for porous medium, DNAPL and surfactant. Mass transfer rate predictions were about one order of magnitude lower in the 2-D flow cell experiment than in 1-D column experiments. These results give an indication for the importance of dimensionality during surfactant remediation.

Research paper thumbnail of Surfactant enhanced solubilization of residual trichloroethene: an experimental and numerical analysis

Journal of Contaminant Hydrology, 2000

Research paper thumbnail of Numerical simulation of transport and sequential biodegradation of chlorinated aliphatic hydrocarbons using CHAIN_2D

Hydrological Processes, 1999

Research paper thumbnail of Multi-Objective Optimization of the Setup of a Surfactant-Enhanced DNAPL Remediation

Environmental Science & Technology, 2005

Research paper thumbnail of A multi-objective optimization framework for surfactant-enhanced remediation of DNAPL contaminations

Journal of Contaminant Hydrology, 2006

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