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Phytoscreening as an efficient tool to delineate chlorinated solvent sources at a chlor-alkali facility

Authors :
Loïc Yung
Matt A. Limmer
Michel Chalot
Jérôme Lagron
David Cazaux
Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE)
Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC)
Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)
INOVYN
INOVYN France
Department of Plant and Soil Sciences and Delaware Biotechnology Institute
University of Delaware [Newark]
Laboratoire Chrono-environnement ( LCE )
Université Bourgogne Franche-Comté ( UBFC ) -Université de Franche-Comté ( UFC ) -Centre National de la Recherche Scientifique ( CNRS )
Source :
Chemosphere, Chemosphere, Elsevier, 2017, 174, pp.82-89. ⟨10.1016/j.chemosphere.2017.01.112⟩, Chemosphere, Elsevier, 2017, 174, pp.82-89. 〈10.1016/j.chemosphere.2017.01.112〉
Publication Year :
2017
Publisher :
HAL CCSD, 2017.

Abstract

Chlorinated ethenes (CE) are among the most common volatile organic compounds (VOC) that contaminate groundwater, currently representing a major source of pollution worldwide. Phytoscreening has been developed and employed through different applications at numerous sites, where it was generally useful for detection of subsurface chlorinated solvents. We aimed at delineating subsurface CE contamination at a chlor-alkali facility using tree core data that we compared with soil data. For this investigation a total of 170 trees from experimental zones was sampled and analyzed for perchloroethene (PCE) and trichloroethene (TCE) concentrations, measured by solid phase microextraction gas chromatography coupled to mass spectrometry. Within the panel of tree genera sampled, Quercus and Ulmus appeared to be efficient biomonitors of subjacent TCE and PCE contamination, in addition to the well known and widely used Populus and Salix genera. Among the 28 trees located above the dense non-aqueous phase liquid (DNAPL) phase zone, 19 tree cores contained detectable amounts of CE, with concentrations ranging from 3 to 3000 μg L-1. Our tree core dataset was found to be well related to soil gas sampling results, although the tree coring data were more informative. Our data further emphasized the need for choosing the relevant tree species and sampling periods, as well as taking into consideration the nature of the soil and its heterogeneity. Overall, this low-invasive screening method appeared useful to delineate contaminants at a small-scale site impacted by multiple sources of chlorinated solvents.

Details

Language :
English
ISSN :
00456535
Database :
OpenAIRE
Journal :
Chemosphere, Chemosphere, Elsevier, 2017, 174, pp.82-89. ⟨10.1016/j.chemosphere.2017.01.112⟩, Chemosphere, Elsevier, 2017, 174, pp.82-89. 〈10.1016/j.chemosphere.2017.01.112〉
Accession number :
edsair.doi.dedup.....7e7ea84e412aba2846d215f573467a03
Full Text :
https://doi.org/10.1016/j.chemosphere.2017.01.112⟩