Assessing methane oxidation under landfill covers and its contribution to the above atmospheric CO2 levels: The added value of the isotope (delta C-13 and delta O-18 CO2; delta C-13 and delta D CH4) approach - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Waste Management Année : 2012

Assessing methane oxidation under landfill covers and its contribution to the above atmospheric CO2 levels: The added value of the isotope (delta C-13 and delta O-18 CO2; delta C-13 and delta D CH4) approach

(1) , (1) , (1) , (2)
1
2

Résumé

We are presenting here a multi-isotope approach (delta C-13 and delta O-18 of CO2; delta C-13 and delta D of CH4) to assess (i) the level(s) of methane oxidation during waste biodegradation and its migration through a landfill cover in Sonzay (France), and (ii) its contribution to the atmospheric CO2 levels above the surface. The isotope approach is compared to the more conventional mass balance approach. Results from the two techniques are comparable and show that the CH4 oxidation under the landfill cover is heterogenous, with low oxidation percentages in samples showing high biogas fluxes, which was expected in clay covers presenting fissures, through which CH4 is rapidly transported. At shallow depth, more immobile biogas pockets show a higher level of CH4 oxidation by the methanotrophic bacteria. delta C-13 of CO2 samples taken at different heights (from below the cover up to 8 m above the ground level) were also used to identify and assess the relative contributions of its main sources both under the landfill cover and in the surrounding atmosphere.
Fichier non déposé

Dates et versions

hal-00847926 , version 1 (24-07-2013)

Identifiants

Citer

David Widory, Eric Proust, Gaël Bellenfant, O. Bour. Assessing methane oxidation under landfill covers and its contribution to the above atmospheric CO2 levels: The added value of the isotope (delta C-13 and delta O-18 CO2; delta C-13 and delta D CH4) approach. Waste Management, 2012, 32 (9), pp.1685-1692. ⟨10.1016/j.wasman.2012.04.008⟩. ⟨hal-00847926⟩

Collections

INERIS BRGM
202 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More