Behavior of PAH/mineral associations during thermodesorption: impact for the determination of mineral retention properties towards PAHs
| Autor: | Catherine Lorgeoux, Pierre Faure, Alain Saada, Coralie Biache |
|---|---|
| Přispěvatelé: | Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), GeoRessources, Institut national des sciences de l'Univers (INSU - CNRS)-Centre de recherches sur la géologie des matières premières minérales et énergétiques (CREGU)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Evolved gas analysis
Thermal desorption Polycyclic aromatic hydrocarbon 010501 environmental sciences 01 natural sciences Biochemistry Gas Chromatography-Mass Spectrometry Analytical Chemistry Matrix (chemical analysis) Desorption Polycyclic Aromatic Hydrocarbons [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment 0105 earth and related environmental sciences chemistry.chemical_classification Minerals Chemistry 010401 analytical chemistry Temperature Sorption Silicon Dioxide 0104 chemical sciences Molecular Weight Environmental chemistry Bentonite [SDE]Environmental Sciences Silica sand Clay minerals |
| Zdroj: | Analytical and Bioanalytical Chemistry Analytical and Bioanalytical Chemistry, Springer Verlag, 2015, 407 (12), pp.3509-3516. ⟨10.1007/s00216-015-8547-z⟩ |
| ISSN: | 1618-2642 1618-2650 |
| Popis: | International audience; Polycyclic aromatic hydrocarbons (PAHs) associated with two minerals (silica sand and bentonite) presenting opposite retention properties were analyzed with a thermodesorption (Td)-GC-MS coupling in order to validate this technique as a new and rapid way to evaluate the solid sorption properties. Two analysis modes were used, evolved gas analysis (EGA) and Td with cryo-trap. EGA allowed a real-time monitoring of the compounds desorbed during a temperature program and gave a first screening of the samples while Td gave more precise indications on compound abundances for selected temperature ranges. When associated with silica sand, PAHs were released at relatively low temperatures (< 300 A degrees C) close to corresponding boiling point, whereas for the PAH/bentonite mixture, PAHs were desorbed at much higher temperatures; they were also present in much lower abundance and were associated with mono-aromatic compounds. With bentonite, the PAH abundances decreased and the mono-aromatics increased with the increasing PAH molecular weight. These results indicated a clear PAH retention by the bentonite due to polymerization, followed by a thermal cracking at higher temperatures. The Td-GC-MS was proven to efficiently underline differences in retention properties of two minerals, and this study highlights the great potential of this technique to evaluate compound/matrix bond strength and interaction. |
| Databáze: | OpenAIRE |
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