Now showing documents 21-30 of 53
Water retention curve and hydraulic conductivity function of highly compressible materials
Other titre : Courbe de rétention d’eau et fonction de conductivité hydraulique des matériaux hautement compressibles
Abstract: A model capable of describing the suction-induced consolidation curve (void ratio function) and water retention curve (WRC) of highly compressible materials (HCM) is developed, validated and finally applied to ...
Biotic methane oxidation within an instrumented experimental landfill cover
Other titre : Methane oxidation within an experimental landfill cover
Abstract: An experimental landfill cover composed of a mixture of sand and compost was installed at the St-Nicéphore landfill in Québec (Canada). The mixture was evaluated as a potential substrate to promote methane (CH4) ...
Quantifying microbial methane oxidation efficiencies in two experimental landfill biocovers using stable isotopes
Abstract: Stable isotope analyses were performed on gas samples collected within two instrumented biocovers, with the goal of evaluating CH4 oxidation efficiencies (f0). In each of the biocovers, gas probes were installed ...
Can soil gas profiles be used to assess microbial CH4 oxidation in landfill covers?
Abstract: A method is proposed to estimate CH(4) oxidation efficiency in landfill covers, biowindows or biofilters from soil gas profile data. The approach assumes that the shift in the ratio of CO(2) to CH(4) in the gas ...
Evolution of biodegradation of deinking by-products used as alternative cover material
Abstract: Deinking by-products (DBP) have been used as alternative material for the construction of cover systems for municipal waste disposal facilities and acid-producing mine residues. Considering the high organic ...
Design of inclined covers with capillary barrier effect
Abstract: A design procedure is proposed to minimize water infiltration into landfills in optimizing the water diversion length of inclined covers with capillary barrier effect (CCBE). This design procedure aims at ...
Environmental, geotechnical and hydraulic behaviour of a cellulose-rich by-product used as alternative cover material
Abstract: Deinking by-product (DBP), a cellulose-rich by-product produced in the early stages of the paper recycling process, has been used as alternative material for the construction of cover systems for municipal waste ...
Measurement of gas diffusion through soils: Comparison of laboratory methods
Abstract: Gas movement through soils is important for ecosystems and engineering in many ways such as for microbial and plant respiration, passive methane oxidation in landfill covers and oxidation of mine residues. ...
Determination of the hydraulic conductivity function of a highly compressible material based on tests with saturated samples
Abstract: An alternative procedure to determine the hydraulic conductivity function (k-function) based on relationships between saturated hydraulic conductivity and void ratio and between air-entry value and void ratio ...
Predicting the diversion length of capillary barriers using steady state and transient state numerical modeling: Case study of the Saint-Tite-des-Caps landfill final cover
Abstract: Covers with capillary barrier effect (CCBE) have already been proposed to meet regulatory requirements for landfill final covers. Modeling of CCBE may be a relatively complex and time consuming task. Simpler, ...