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Title: | C, Cl and H compound-specific isotope analysis to assess natural versus Fe(0) barrier-induced degradation of chlorinated ethenes at a contaminated site |
Author: | Audí Miró, Carme Cretnik, S. Torrentó Aguerri, Clara Rosell, Mònica Shouakar-Stash, O. Otero Pérez, Neus Palau, Jordi Elsner, M. Soler i Gil, Albert |
Keywords: | Contaminació de l'aigua Depuració d'aigües residuals Hidrologia d'aigües subterrànies Isòtops Water pollution Purification of sewage Groundwater hydrology Isotopes |
Issue Date: | 15-Dec-2015 |
Publisher: | Elsevier B.V. |
Abstract: | Compound-specific isotopic analysis of multiple elements (C, Cl, H) was tested to better assess the effect of a zero-valent iron-permeable reactive barrier (ZVI-PRB) installation at a site contaminated with tetrachloroethene (PCE) and trichloroethene (TCE). The focus was on (1) using 13C to evaluate natural chlorinated ethene biodegradation and the ZVI-PRB efficiency; (2) using dual element 13C-37Cl isotopic analysis to distinguish biotic from abiotic degradation of cis-dichloroethene (cis-DCE); and (3) using 13C-37Cl-2H isotopic analysis of cis-DCE and TCE to elucidate different contaminant sources. Both biodegradation and degradation by ZVI-PRB were indicated by the metabolites that were detected and the 13C data, with a quantitative estimate of the ZVI-PRB efficiency of less than 10% for PCE. Dual ele- ment 13C-37Cl isotopic plots confirmed that biodegradation was the main process at the site including the ZVI-PRB area. Based on the carbon isotope data, approximately 45% and 71% of PCE and TCE, respec- tively, were estimated to be removed by biodegradation. 2H combined with 13C and 37Cl seems to have identified two discrete sources contributing to the contaminant plume, indicating the potential of 2 H to discriminate whether a compound is of industrial origin, or whether a compound is formed as a daughter product during degradation. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.jhazmat.2015.06.052 |
It is part of: | Journal of Hazardous Materials, 2015, vol. 299, p. 747-754 |
URI: | http://hdl.handle.net/2445/155353 |
Related resource: | https://doi.org/10.1016/j.jhazmat.2015.06.052 |
ISSN: | 0304-3894 |
Appears in Collections: | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) |
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