Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide
Global sustainable development faces challenges in greenhouse gas emission, consumption of non-renewable resource and energy, waste landfilling, and environmental pollution. Geotechnical engineering also faces similar challenges; for example, the use of cement and lime for stabilisation/solidificati...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/164132 |
| _version_ | 1811679278239055872 |
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| author | Xu, Bo Yi, Yaolin |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Xu, Bo Yi, Yaolin |
| author_sort | Xu, Bo |
| collection | NTU |
| description | Global sustainable development faces challenges in greenhouse gas emission, consumption of non-renewable resource and energy, waste landfilling, and environmental pollution. Geotechnical engineering also faces similar challenges; for example, the use of cement and lime for stabilisation/solidification (S/S) of contaminated soil is associated with carbon dioxide (CO2) emission and consumption of limestone and energy. In this context, this study introduces a sustainable S/S method by using an industrial waste, ladle furnace slag (LFS), and a greenhouse gas, CO2, to replace common additives for S/S of lead (Pb)-contaminated soil. LFS was first mixed with Pb-contaminated soils and then CO2 was introduced into the soil for carbonation. The results showed that LFS-stabilised Pb-contaminated soils could achieve CO2 uptake up to 18% of LFS mass. After carbonation, the concentration of leached Pb from contaminated soils was reduced by three orders of magnitude than that without carbonation, demonstrating higher S/S efficacy than cement, lime, and magnesia. Additionally, this method can improve soil strength, as well as reduce non-renewable resource consumption, energy use, LFS landfilling, and additive cost. |
| first_indexed | 2024-10-01T03:06:37Z |
| format | Journal Article |
| id | ntu-10356/164132 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:06:37Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1641322023-01-05T08:26:33Z Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide Xu, Bo Yi, Yaolin School of Civil and Environmental Engineering Engineering::Civil engineering Contaminated Soil Carbon Dioxide Global sustainable development faces challenges in greenhouse gas emission, consumption of non-renewable resource and energy, waste landfilling, and environmental pollution. Geotechnical engineering also faces similar challenges; for example, the use of cement and lime for stabilisation/solidification (S/S) of contaminated soil is associated with carbon dioxide (CO2) emission and consumption of limestone and energy. In this context, this study introduces a sustainable S/S method by using an industrial waste, ladle furnace slag (LFS), and a greenhouse gas, CO2, to replace common additives for S/S of lead (Pb)-contaminated soil. LFS was first mixed with Pb-contaminated soils and then CO2 was introduced into the soil for carbonation. The results showed that LFS-stabilised Pb-contaminated soils could achieve CO2 uptake up to 18% of LFS mass. After carbonation, the concentration of leached Pb from contaminated soils was reduced by three orders of magnitude than that without carbonation, demonstrating higher S/S efficacy than cement, lime, and magnesia. Additionally, this method can improve soil strength, as well as reduce non-renewable resource consumption, energy use, LFS landfilling, and additive cost. Published version 2023-01-05T08:26:32Z 2023-01-05T08:26:32Z 2022 Journal Article Xu, B. & Yi, Y. (2022). Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide. Soils and Foundations, 62(5), 101205-. https://dx.doi.org/10.1016/j.sandf.2022.101205 0038-0806 https://hdl.handle.net/10356/164132 10.1016/j.sandf.2022.101205 5 62 101205 en Soils and Foundations © 2022 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf |
| spellingShingle | Engineering::Civil engineering Contaminated Soil Carbon Dioxide Xu, Bo Yi, Yaolin Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide |
| title | Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide |
| title_full | Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide |
| title_fullStr | Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide |
| title_full_unstemmed | Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide |
| title_short | Stabilisation/solidification of lead-contaminated soil by using ladle furnace slag and carbon dioxide |
| title_sort | stabilisation solidification of lead contaminated soil by using ladle furnace slag and carbon dioxide |
| topic | Engineering::Civil engineering Contaminated Soil Carbon Dioxide |
| url | https://hdl.handle.net/10356/164132 |
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