Abstract
We conducted laboratory experiments to investigate the influence of surface wettability on Dense Nonaqueous Phase Liquid (DNAPL) migration in a rough-walled fracture at various groundwater flow conditions. A glass replica of a granite sample containing a rough-walled single fracture was made, and DNAPL migration experiments were carried out with the replica whose surface wettability was controlled by using several NAPL exposures. In the experiments, we observed different migration paths of DNAPL among the hydrophilic, weakly hydrophobic, and strongly hydrophobic surfaces in the linear flow regime, whereas there was little difference in the nonlinear flow regime. The modified invasion percolation model was used to analyze the quantitative influence of the wettability change and groundwater flow on DNAPL migration paths in a rough-walled fracture, and suggested that the wettability is important to determine the DNAPL migration path in the linear flow regime but inertial force of groundwater becomes strong enough to overcome the influence of the wettability in the nonlinear flow regime.
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Acknowledgments
This research was supported by the Basic Research Project of the Korea Institute of Geoscience and Mineral Resources (KIGAM) and funded by the Ministry of Science, ICT and Future Planning of Korea.
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This article has been retracted at the request of the Author.
This study (published in the journal Transport in Porous Media: "DNAPL migration in a rough fracture under various wettability and flow conditions", Volume 107, Issue 2 (2015), Page 321-333) extended the author's previous experimental research by applying numerical simulation, that was published in Journal of Contaminant Hydrology, Title: Wettability-dependent DNAPL migration in a rough-walled fracture, Volume 113, (2010), Page 44-55.
Although there were some modification and improvements through numerical modeling (MIP model), according to the author's advice novel contribution is insufficient and the overall conclusion is similar compared to his /her earlier published study.
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Lee, H.B. RETRACTED ARTICLE: DNAPL Migration in a Rough Fracture Under Various Wettability and Flow Conditions. Transp Porous Med 107, 321–333 (2015). https://doi.org/10.1007/s11242-014-0438-9
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DOI: https://doi.org/10.1007/s11242-014-0438-9