PMID: 18200874Jan 19, 2008Paper

Role of diffusion in chemical oxidation of PCE in a dual permeability system

Environmental Science & Technology
J HønningPoul L Bjerg

Abstract

The effect of in situ chemical oxidation (ISCO) with permanganate (MnO4-) on tetrachloroethene (PCE) in a dual permeability system consisting of low permeability clay with high permeability sand lenses was investigated by two-dimensional laboratory experiments. The experiments imitate a field remediation at a former dry cleaning facility in Denmark. Results from laboratory experiments and field observations both show that after an application of MnO4- in the sand layer, the diffusion rate into the matrix is decreased due to reaction with PCE and the natural oxidant demand (NOD) related to the clayey till. A narrow but very efficient reaction zone is created in the clayey till. Initiallythe zone developed rapidlyfollowed by a slower expansion with time. PCE will counter diffuse into the reaction zone, where it will be degraded as long as MnO4- is present. A mass balance for the laboratory experiment revealed that the reaction between MnO4- and the clayey till was responsible for up to 90% of the total MnO4- consumption. Based on laboratory experiments, the high MnO4- consumption from reaction with clayey till appears to have been the limiting factor for the oxidation of PCE at the field site and is thus impairing the efficiency ...Continue Reading

References

May 12, 2001·Environmental Science & Technology·M D NelsonD Loomer
Jul 28, 2001·Journal of Contaminant Hydrology·M H SchrothJ D Istok
Jun 22, 2002·Journal of Contaminant Hydrology·L K MacKinnon, N R Thomson
May 12, 2005·Environmental Science & Technology·Kevin G MumfordRichelle M Allen-King
May 12, 2005·Environmental Science & Technology·Leila HrapovicEric D Hood
Dec 5, 2006·Journal of Contaminant Hydrology·J HønningP L Bjerg

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Citations

Feb 26, 2014·Journal of Contaminant Hydrology·Qiuyuan HuangCharles E Schaefer
Jan 17, 2012·Environmental Science & Technology·Amy J Pickering, Jennifer Davis
Apr 8, 2011·Journal of Contaminant Hydrology·Julie C ChambonPoul L Bjerg
Oct 13, 2009·Journal of Contaminant Hydrology·Xiuyuan Xu, Neil R Thomson
Apr 21, 2016·The Science of the Total Environment·David T AdamsonCharles J Newell
Apr 29, 2014·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Adam Tressler, Christopher Uchrin
Jun 10, 2010·Environmental Science & Technology·Charlotte ScheutzPoul L Bjerg
Jan 1, 2020·Ground Water Monitoring & Remediation·Michael C BrooksJunqi Huang

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