LAPSE:2020.0311
Published Article
LAPSE:2020.0311
Methane Emission Reduction Enhanced by Hydrophobic Biochar-Modified Soil Cover
March 25, 2020
The microbial oxidation of CH4 in biochar-modified soil cover is considered a potent option for the mitigation of emissions from old landfills or sites containing wastes full of low CH4 generation rates. The mechanism of methane oxidizing bacteria (MOB) can be enhanced by amending the landfill cover soil with biochar, which is recalcitrant to biological degradation and can adsorb CH4 while facilitating the growth and activity of MOB within its porous structure. However, the increase in the permeability coefficient and water content of the cover due to the addition of biochar also affects the methane removal efficiency. A hydrophobic biochar modified by KH-570 was employed to reduce the water content and to promote the diffusion and oxidation of CH4 in the cover. Several series of small-scale column tests were conducted to quantify the CH4 oxidation properties of the landfill cover soil amended with biochar and hydrophobic biochar under different levels of exposed CH4 concentrations (5% and 15%), heights (10−66 cm), and temperatures (15−40 °C). After 30 days of domestication, the removal rate of the hydrophobic biochar-modified soil cover reached 98.8%. The water holding capacity of the cover and the CH4 oxidation efficiency under different moisture contents were investigated in different columns. The hydrophobic biochar-modified soil cover has a weak water holding capacity, low saturated water content, and optimal CH4 oxidation efficiency at this time.
Record ID
Keywords
biocover, hydrophobic biochar, landfill cover, methane
Subject
Suggested Citation
Wu B, Xi B, He X, Sun X, Li Q, Ouche Q, Zhang H, Xue C. Methane Emission Reduction Enhanced by Hydrophobic Biochar-Modified Soil Cover. (2020). LAPSE:2020.0311
Author Affiliations
Wu B: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Xi B: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences,
He X: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Resear
Sun X: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Li Q: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Ouche Q: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Zhang H: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Xue C: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Xi B: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences,
He X: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; State Environmental Protection Key Laboratory of Simulation and Control of Groundwater Pollution, Chinese Resear
Sun X: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Li Q: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Ouche Q: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Zhang H: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Xue C: Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University o
Journal Name
Processes
Volume
8
Issue
2
Article Number
E162
Year
2020
Publication Date
2020-02-01
Published Version
ISSN
2227-9717
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PII: pr8020162, Publication Type: Journal Article
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LAPSE:2020.0311
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doi:10.3390/pr8020162
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Version History
[v1] (Original Submission)
Mar 25, 2020
Verified by curator on
Mar 25, 2020
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v1
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https://psecommunity.org/LAPSE:2020.0311
Original Submitter
Calvin Tsay
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