Effect of source variability and transport processes on carbon isotope ratios of TCE and PCE in two sandy aquifers

Journal of Contaminant Hydrology
Daniel HunkelerB L Parker

Abstract

Chlorinated ethenes often migrate over extended distances in aquifers and may originate from different sources. The aim of this study was to determine whether stable carbon isotope ratios remain constant during dissolution and transport of chlorinated ethenes and whether the ratios can be used to link plumes to their sources. Detailed depth-discrete delineation of the carbon isotope ratio in a tetrachloroethene (PCE) plume and in a trichloroethene (TCE) plume was done along cross-sections orthogonal to groundwater flow in two sandy aquifers in the Province of Ontario, Canada. At the TCE site, TCE concentrations up to solubility were measured in one high concentration zone close to the bottom of the aquifer from where dense non-aqueous phase liquid (DNAPL) was collected. A laboratory experiment using the DNAPL indicated that only very small carbon isotope fractionation occurs during dissolution of TCE (0.26 per thousand), which is consistent with field observations. At most sampling points, the delta(13)C of dissolved TCE was similar to that of the DNAPL except for a few sampling points at the bottom of the aquifer close to the underlying aquitard. At these points, a (13)C enrichment of up to 2.4 per thousand was observed, which...Continue Reading

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Citations

Sep 29, 2007·Analytical and Bioanalytical Chemistry·Michaela BlessingTorsten C Schmidt
Feb 4, 2012·Analytical and Bioanalytical Chemistry·Martin ElsnerArndt Schimmelmann
Nov 13, 2012·Applied Microbiology and Biotechnology·Martin ThullnerLukas Y Wick
May 5, 2012·Environmental Science & Technology·Daniel HunkelerOle Stig Jacobsen
Jun 12, 2012·Environmental Science & Technology·Boris M Van Breukelen, Massimo Rolle
Aug 14, 2013·Environmental Science & Technology·Matt A LimmerJoel G Burken
Sep 24, 2013·Environmental Science & Technology·S Jeannottat, D Hunkeler
Jun 15, 2007·Arhiv za higijenu rada i toksikologiju·Nada Miljević, Dusan Golobocanin
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Jan 28, 2016·The Science of the Total Environment·Bruce S XuBrent E Sleep
May 30, 2009·Journal of Contaminant Hydrology·Hongbin ZhanDongmin Sun
Dec 22, 2006·Journal of Contaminant Hydrology·Steven W ChapmanDaniel Hunkeler
May 27, 2015·Environmental Science and Pollution Research International·C SbarbatiM Petitta
Jan 10, 2012·Ground Water·Paulo Lojkasek-LimaJohn A Cherry
Dec 1, 2009·Environmental Microbiology Reports·Steffi HerrmannHans-Hermann Richnow
Aug 3, 2013·Journal of Contaminant Hydrology·Abolfazl RezaeiMohammad Zare
Dec 1, 2009·Environmental Science & Technology·Christoph AeppliThomas B Hofstetter
Jan 1, 2010·Environmental Science & Technology·Jennifer R McKelvieMyrna J Simpson
Sep 19, 2007·Environmental Science & Technology·Martin ElsnerBarbara Sherwood Lollar

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