Enhancement of dilution and transverse reactive mixing in porous media: experiments and model-based interpretation

Journal of Contaminant Hydrology
Massimo RollePeter Grathwohl


Transport and natural attenuation of contaminant plumes in groundwater are often controlled by transverse dispersion. The extent of mixing between dissolved reaction partners at the fringe of a plume determines its length and depends strongly on the groundwater flow field. Transient flow conditions as well as the focusing of the flow in high-permeability zones may enhance transverse mixing of dissolved species and, therefore, create favorable conditions for the natural attenuation of contaminant plumes. The aim of the present study is to experimentally test the influence of these processes on solute mixing and to directly compare the results with those under analogous homogeneous and steady-state conditions. We have performed conservative and reactive tracer experiments in a quasi two-dimensional tank filled with glass beads of different sizes. The experiments have been carried out in both homogeneous and heterogeneous porous media under steady-state and transient (i.e. oscillating) flow fields. We used fluorescein as conservative tracer; whereas an alkaline solution (NaOH) was injected into ambient acidic water (HCl) in the reactive experiments. A pH indicator was added to the reacting solutions in order to visualize the emerg...Continue Reading


Apr 5, 2001·Ground Water·M SchirmerE O Frind
Jan 31, 2002·Journal of Contaminant Hydrology·T B Boving, Peter Grathwohl
Sep 19, 2002·Journal of Contaminant Hydrology·I D Klenk, Peter Grathwohl
Oct 29, 2002·Journal of Contaminant Hydrology·Olaf A Cirpka
Mar 27, 2003·Ground Water·Henning PrommerC Zheng
Oct 4, 2003·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Marco Dentz, Jesus Carrera
Jul 12, 2005·Journal of Contaminant Hydrology·Olaf A Cirpka
Aug 24, 2005·Journal of Contaminant Hydrology·Md Arifur RahmanOlaf A Cirpka
Feb 28, 2006·Journal of Contaminant Hydrology·U Maier, Peter Grathwohl
Mar 25, 2006·Ground Water·Olaf A CirpkaPeter Grathwohl
Mar 6, 2007·Ground Water·V SrinivasanK K Lee
Dec 18, 2007·Journal of Contaminant Hydrology·Robert D BauerChristian Griebler
Dec 20, 2008·Journal of Contaminant Hydrology·Robert D BauerChristian Griebler
Nov 10, 2009·Journal of Contaminant Hydrology·Massimo RollePeter Grathwohl


Jun 12, 2012·Environmental Science & Technology·Boris M Van Breukelen, Massimo Rolle
Apr 16, 2013·Journal of Contaminant Hydrology·Nicholas B EngdahlGraham E Fogg
Nov 20, 2012·Journal of Contaminant Hydrology·David L Hochstetler, Peter K Kitanidis
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May 24, 2011·Journal of Contaminant Hydrology·Michael G TrefryKlaus Regenauer-Lieb
Apr 28, 2016·Proceedings. Mathematical, Physical, and Engineering Sciences·M Di DatoA Bellin
Dec 18, 2013·Ground Water·Christina M HabererPeter Grathwohl
Feb 2, 2015·Journal of Contaminant Hydrology·Dominik HöyngFernando Mazo D'Affonseca
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Jul 20, 2019·Physical Review Letters·M A BudroniL Rongy

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