Life cycle analysis of common landfill final cover systems focusing on carbon neutrality
文献类型：期刊论文
| 作者 | Ng, Charles Wang Wai3; Chen, Hongqi3; Guo, Haowen3; Chen, Rui2; Xue, Qiang1
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2024-02-20 |
| 卷号 | 912页码:14 |
| 关键词 | Life cycle analysis Carbon neutrality Recycled concrete aggregate Biochar Landfill cover |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2023.168863 |
| 英文摘要 | Carbon emissions from landfill construction and management have become a global concern. Life cycle analysis (LCA) has been widely used to assess the environmental impacts of engineered infrastructures over their life-times. LCA has also been applied to landfill leachate and gas management, but rarely to landfill final cover systems. This paper reports the results of an LCA of the following landfill final cover systems: compacted clay cover, geomembrane cover, cover with capillary effects (CCBE), dual capillary barrier cover, three-layer landfill cover system using natural soils, three-layer cover using recycled concrete aggregate (RCA) and biochar-amended three-layer landfill cover system using RCA. The LCA assessment of landfill cover considers the cost, carbon emissions and carbon sequestration during the production, construction and operation phases. The effects of landfill cover on global warming, freshwater eutrophication, terrestrial ecotoxicity, freshwater ecotoxicity, marine ecotoxicity and fossil resource scarcity are also evaluated. In addition, the sensitivities of cost and carbon emission to the use of electric-powered machines and transportation distance are analysed. It is revealed that the three-layer cover system using RCA and biochar has the lowest unit cost and carbon emission of all of the covers, up to 88 % and 66 % lower, respectively, than those of the other six covers. In addition, this cover system has the highest carbon sequestration rate, with a value of 47.9 kg CO2/(y & sdot;m2), four times higher than that of the compacted clay cover. Finally, this sustainable cover mitigates global warming and reduces adverse environ-mental impacts by up to 82 %. Therefore, the biochar amended three-layer cover system using RCA without geomembrane offers the greatest economic benefits, performs effectively in terms of the pursuit of carbon neutrality and promotes sustainable development. |
| 资助项目 | National Natural Science Foundation of China[U20A20320] ; State Key Laboratory of Subtropical Building Science in South China University of Technology[2022ZC01] ; Shenzhen Science and Technology Innovation Program[KCXFZ20211020163816023] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001129529000001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40178]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Guo, Haowen |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 2.Harbin Inst Technol, Sch Civil & Environm Engn, Shenzhen, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ng, Charles Wang Wai,Chen, Hongqi,Guo, Haowen,et al. Life cycle analysis of common landfill final cover systems focusing on carbon neutrality[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,912:14. |
| APA | Ng, Charles Wang Wai,Chen, Hongqi,Guo, Haowen,Chen, Rui,&Xue, Qiang.(2024).Life cycle analysis of common landfill final cover systems focusing on carbon neutrality.SCIENCE OF THE TOTAL ENVIRONMENT,912,14. |
| MLA | Ng, Charles Wang Wai,et al."Life cycle analysis of common landfill final cover systems focusing on carbon neutrality".SCIENCE OF THE TOTAL ENVIRONMENT 912(2024):14. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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