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Erschienen in: Environmental Management 4/2024

09.11.2023

Effects of Hydrophobic Biochar-Modified Landfill Soil Cover on Methane Oxidation

verfasst von: Qiuhong Li, Meiyan Xing, Bin Dong, Xiaojie Sun, Hongxia Zhang, Xueshuang Lu, Beibei Wu, Hongxiang Zhu

Erschienen in: Environmental Management | Ausgabe 4/2024

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Abstract

Landfill cover soils play an important role in mitigating landfill methane (CH4) emissions. Incorporating biochar into the soil has proven effective in reducing CH4 emissions. However, the role of hydrophobic biochar in this context remains underexplored. This study investigated the CH4 removal efficiency of a biochar-modified landfill soil cover column (RB) and hydrophobic biochar-modified landfill soil cover column (RH) under varying CH4 influx gas concentrations (25 and 35%), simulated CH4 inflow rates (10, 15, and 20 ml/min), and temperatures (20, 25, 30, 35, and 40 °C). RH consistently outperformed RB in terms of CH4 removal efficiency under these experimental conditions. The optimal conditions for CH4 degradation by both RB and RH were observed at a CH4 influx gas concentration of 35%, a simulated CH4 inflow rate of 10 ml/min, and a temperature of ~30 °C. RH achieved a CH4 removal rate of up to 99.96%. In summary, the addition of hydrophobic biochar enhanced the air permeability and hydrophobicity of landfill cover soils, providing a promising alternative to conventional cover soils for reducing CH4 emissions from landfills.

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Metadaten
Titel
Effects of Hydrophobic Biochar-Modified Landfill Soil Cover on Methane Oxidation
verfasst von
Qiuhong Li
Meiyan Xing
Bin Dong
Xiaojie Sun
Hongxia Zhang
Xueshuang Lu
Beibei Wu
Hongxiang Zhu
Publikationsdatum
09.11.2023
Verlag
Springer US
Erschienen in
Environmental Management / Ausgabe 4/2024
Print ISSN: 0364-152X
Elektronische ISSN: 1432-1009
DOI
https://doi.org/10.1007/s00267-023-01910-0

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