Methane oxidation in landfill cover soil; the combined effects of moisture content, nutrient addition, and cover thickness

Albanna, Muna; Fernandes, L.; Warith, Mostafa A.

doi:10.1139/s06-047

Cited by 49 publications

(23 citation statements)

References 19 publications

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“…The reported values of landfill cover soils' CH 4 oxidizing efficiency vary widely in the literature. Albanna et al (2007) reported that increasing the soil layer thickness from 15 to 20 cm increased the CH 4 oxidation values from 29% to 35% for a soil with 15% moisture content without nutrient addition, from 34% to 38% for a soil with a 30% moisture content without nutrient addition, and from 75% to 81% for a soil with a 30% moisture content with nutrient addition. However, in investigating the effect of bio-cover on CH 4 oxidation at the Leon landfill in Florida, Stern et al (2007) found that the efficiency of CH 4 oxidation can reach 64% with biocover utilization, while only 30% efficiency was reported for the control cell.…”

Section: Factors Affecting Methane Oxidationmentioning

confidence: 99%

“…For simplicity, previous studies have reported that the CH 4 oxidation process in landfill cover soils is accomplished by methanotrophic bacteria (Abushammala et al, 2012;Huber-Humer et al, 2008;Albanna et al, 2007;Stern et al, 2007;Kettunen et al, 2006). Methanotrophic bacteria (Fig.…”

Section: Methane Oxidation Bacteriamentioning

confidence: 99%

“…The CH 4 oxidation capacity of landfill cover soils varies within and among landfills due to many factors that affect the oxidation process, such as seasonal variations (Abushammala et al, 2013b;Einola et al, 2007;Maurice and Lagerkvist, 2003;Börjesson et al, 2001), physical and chemical heterogeneities of landfill cover soils (Tecle et al, 2008;Albanna et al, 2007;Visvanathan et al, 1999), and the CH 4 concentrations in landfills (Boeckx et al, 1996). According to Mosier et al (2004), the major factors controlling CH 4 oxidation are potential biological demand and diffusion.…”

Section: Factors Affecting Methane Oxidationmentioning

confidence: 99%

“…The addition of nutrients to a soil cover system results in activation of methanotrophic bacteria, thus enhancing the CH 4 oxidation rate and oxidation efficiency (Lee et al, 2009;Albanna et al, 2007;Börjesson et al, 1998). Albanna et al (2007) found that soil moisture and the addition of nutrients have a combined effect on CH 4 oxidation in soil cover, and they reported that adding nutrients to incubated soil with a 32% average moisture content doubles the oxidation efficiency. However, adding nutrients to a soil with a low moisture content (15%) was found to have a negative effect on the oxidation efficiency.…”

Section: Nutrientsmentioning

confidence: 99%

See 3 more Smart Citations

Methane Oxidation in Landfill Cover Soils: A Review

Abushammala¹,

Basri²,

Irwan³

et al. 2014

Asian J. Atmos. Environ

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Migration of methane (CH 4 ) gas from landfills to the surrounding environment negatively affects both humankind and the environment. It is therefore essential to develop management techniques to reduce CH 4 emissions from landfills to minimize global warming and to reduce the human risks associated with CH 4 gas migration. Oxidation of CH 4 in landfill cover soil is the most important strategy for CH 4 emissions mitigation. CH 4 oxidation occurs naturally in landfill cover soils due to the abundance of methanotrophic bacteria. However, the activities of these bacteria are influenced by several controlling factors. This study attempts to review the important issues associated with the CH 4 oxidation process in landfill cover soils. The CH 4 oxidation process is highly sensitive to environmental factors and cover soil properties. The comparison of various biotic system techniques indicated that each technique has unique advantages and disadvantages, and the choice of the best technique for a specific application depends on economic constraints, treatment efficiency and landfill operations.

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Section: Factors Affecting Methane Oxidationmentioning

confidence: 99%

Section: Methane Oxidation Bacteriamentioning

confidence: 99%

Section: Factors Affecting Methane Oxidationmentioning

confidence: 99%

Section: Nutrientsmentioning

confidence: 99%

See 2 more Smart Citations

Methane Oxidation in Landfill Cover Soils: A Review

Abushammala¹,

Basri²,

Irwan³

et al. 2014

Asian J. Atmos. Environ

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“…Soils, more precisely the microorganisms living in soils, have been widely observed to have the unique ability of utilizing CH 4 as their carbon and energy source and oxidize it to CO 2 [5][6]. Landfi ll cover, where CH 4 is presented at high concentration and O 2 is partly available, has proven to possess impressive CH 4 oxidation potential [7][8][9][10][11][12][13][14]; recent study reported a mean value of 36 ±6% for CH 4 oxidation effi ciency [15], although the default value for this parameter set by IPCC and the USEPA is relatively low (0%-10%) [16].…”

Section: Introductionmentioning

confidence: 99%

Role of Landfill Cover in Reducing Methane Emission

Cao¹,

Staszewska²

2013

Archives of Environmental Protection

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Uncontrolled emissions of landfi ll gas may contribute signifi cantly to climate change, since its composition represents a high fraction of methane, a greenhouse gas with 100-year global warming potential 25 times that of carbon dioxide. Landfi ll cover could create favourable conditions for methanotrophy (microbial methane oxidation), an activity of using bacteria to oxidize methane to carbon dioxide. This paper presents a brief review of methanotrophic activities in landfi ll cover. Emphasis is given to the effects of cover materials, environmental conditions and landfi ll vegetation on the methane oxidation potential, and to their underlying effect mechanisms. Methanotrophs communities and methane oxidation kinetics are also discussed. Results from the overview suggest that well-engineered landfi ll cover can substantially increase its potential for reducing emissions of methane produced in landfi ll to the atmosphere.

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Analytical solution for one‐dimensional steady‐state VOCs diffusion in simplified capillary cover systems

Yan

Xie

Rajabi

et al. 2023

Num Anal Meth Geomechanics

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The analytical solution for a one‐dimensional and steady‐state model is proposed to investigate the diffusion of VOCs within landfill capillary cover systems under unsaturated water flow and stable conditions. Examples of coupled water flow and VOCs diffusion are evaluated by the proposed analytical solution to discuss the effects of the evaporation rate and clay thickness. The proficiency of the unsaturated cover system in minimising VOC emissions was also investigated. It was found that the non‐uniform distribution of water content can cause one order of magnitude reductions in the effective diffusion coefficient of VOCs, resulting in the attenuation of VOCs in the cover system. The concentration profile of VOCs is lower for the case with a larger evaporation rate. Ignoring the non‐uniform distribution of water content induced by water flow would underestimate the surface flux of VOCs by a factor of 1.8. The water content and VOC concentration in the cover system can be effectively diminished with the thickness of the clayey layer increasing. The surface flux of VOCs is considerably decreased with increasing thickness of clayey layer. Increasing the thickness of clayey layer from 0.2 to 1 m leads to a reduction in the surface flux of VOCs by a factor of 2.9. The sensitivity analysis provides further insights into the critical role of water flow in affecting VOC transport through the unsaturated cover system. The outcomes highlight that the impacts of unsaturated water flow within the covering system should be considered for assessment of VOC emissions.

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Methane oxidation in landfill cover soil; the combined effects of moisture content, nutrient addition, and cover thickness

Cited by 49 publications

References 19 publications

Methane Oxidation in Landfill Cover Soils: A Review

Methane Oxidation in Landfill Cover Soils: A Review

Role of Landfill Cover in Reducing Methane Emission

Analytical solution for one‐dimensional steady‐state VOCs diffusion in simplified capillary cover systems

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