HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Intramolecular isotope effects during permanganate oxidation and acid hydrolysis of methyl tert-butyl ether

Abstract : Stable isotopes have been widely used to monitor remediation of environmental contaminants over the last decades. This approach gives a good mechanistic description of natural or assisted degradation of organic pollutants, such as methyl tert-butyl ether (MTBE). Since abiotic degradation seems to be the most promising assisted attenuation method, the isotopic fractionation associated with oxidation and hydrolysis processes need to be further investigated in order to understand better these processes and make their monitoring more efficient. In this study, position-specific isotope effects (PSIEs) associated with permanganate oxidation and acid hydrolysis of MTBE were determined using isotope ratio monitoring by 13C Nuclear Magnetic Resonance Spectrometry (irm-13C NMR) combined with isotope ratio monitoring by Mass Spectrometry (irm-MS). The use of this Position-Specific Isotopic Analysis (PSIA) method makes it possible to observe a specific normal isotope effect (IE) associated with each of these two abiotic degradation mechanisms. The present work demonstrates that the 13C isotope pattern of the main degradation product, tert-butyl alcohol (TBA), depends on the chemical reaction by which it is produced. Furthermore, this study also demonstrates that PSIA at natural abundance can give new insights into reaction mechanisms and that this methodology is very promising for the future of modeling the remediation of organic contaminants.
Complete list of metadata

Cited literature [66 references]  Display  Hide  Download

Contributor : Patrick Höhener Connect in order to contact the contributor
Submitted on : Tuesday, February 4, 2020 - 3:24:16 PM
Last modification on : Wednesday, April 27, 2022 - 3:48:13 AM


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License




Maxime Julien, Didier Gori, Patrick Höhener, Richard Robins, Gerald Remaud. Intramolecular isotope effects during permanganate oxidation and acid hydrolysis of methyl tert-butyl ether. Chemosphere, Elsevier, In press, 248, pp.125975. ⟨10.1016/j.chemosphere.2020.125975⟩. ⟨hal-02466621⟩



Record views


Files downloads