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Carbon and hydrogen isotope effects during sorption of organic contaminants on carbonaceous materials

Schüth, Christoph and Taubald, Heinrich and Bolaño, Nerea and Maciejczyk, Kirsten (2003):
Carbon and hydrogen isotope effects during sorption of organic contaminants on carbonaceous materials.
In: Journal of Contaminant Hydrology, Elsevier, pp. 269-281, 64, (3-4), ISSN 01697722, DOI: 10.1016/S0169-7722(02)00216-4, [Online-Edition: http://www.ncbi.nlm.nih.gov/pubmed/12814884],
[Article]

Abstract

Stable carbon and hydrogen isotopes can be an efficient means to validate biodegradation of organic contaminants in groundwater since it results in an isotopic fractionation. A prerequisite in applying this method in the field is the proof that other processes decreasing the contaminant concentration are conservative with respect to isotope effects. In this paper we show for carbon isotopes of halogenated hydrocarbon compounds trichloroethene (TCE), cis-dichloroethene (c-DCE), vinylchloride (VC) and carbon and hydrogen isotopes of BTEX compounds (benzene, toluene, p-xylene) that no significant fractionation occurs during equilibrium sorption onto activated carbon, lignite coke and lignite. In general, effects were in the range of the reproducibility limit of the analytical instrument (0.5� for $\delta$13C, and 8� for $\delta$2H). This observation was made for fractions sorbed of less than 5{\%} to more than 95{\%}. Also for rate-limited sorption of TCE onto activated carbon, no significant fractionation in carbon isotopes could be observed. These findings support the assumption that for these classes of compounds, sorption processes in aquifer systems are conservative with respect to isotope effects. {\textcopyright} 2003 Elsevier Science B.V. All rights reserved.

Item Type: Article
Erschienen: 2003
Creators: Schüth, Christoph and Taubald, Heinrich and Bolaño, Nerea and Maciejczyk, Kirsten
Title: Carbon and hydrogen isotope effects during sorption of organic contaminants on carbonaceous materials
Language: English
Abstract:

Stable carbon and hydrogen isotopes can be an efficient means to validate biodegradation of organic contaminants in groundwater since it results in an isotopic fractionation. A prerequisite in applying this method in the field is the proof that other processes decreasing the contaminant concentration are conservative with respect to isotope effects. In this paper we show for carbon isotopes of halogenated hydrocarbon compounds trichloroethene (TCE), cis-dichloroethene (c-DCE), vinylchloride (VC) and carbon and hydrogen isotopes of BTEX compounds (benzene, toluene, p-xylene) that no significant fractionation occurs during equilibrium sorption onto activated carbon, lignite coke and lignite. In general, effects were in the range of the reproducibility limit of the analytical instrument (0.5� for $\delta$13C, and 8� for $\delta$2H). This observation was made for fractions sorbed of less than 5{\%} to more than 95{\%}. Also for rate-limited sorption of TCE onto activated carbon, no significant fractionation in carbon isotopes could be observed. These findings support the assumption that for these classes of compounds, sorption processes in aquifer systems are conservative with respect to isotope effects. {\textcopyright} 2003 Elsevier Science B.V. All rights reserved.

Journal or Publication Title: Journal of Contaminant Hydrology
Volume: 64
Number: 3-4
Publisher: Elsevier
ISBN: 0169-7722
Uncontrolled Keywords: Carbon isotopes,Hydrogen isotopes,Isotopic fractionation,Natural attenuation,Sorption
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences > Earth Science > Hydrogeology
Date Deposited: 17 Apr 2018 12:20
DOI: 10.1016/S0169-7722(02)00216-4
Official URL: http://www.ncbi.nlm.nih.gov/pubmed/12814884
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