Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sites
High-temperature thermal desorption is effective for remediating organic-contaminated sites, but its damage to soil functions and high energy consumption raise concerns. In this work, the variation of fertility indicators of two soils with thermal treatment temperature was investigated experimentall...
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Elsevier
2024-12-01
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| author | Yu-Hao Wu Yue-Fei Wu Zi-Qin Zhu Qing Wang Li-Wu Fan Zi-Tao Yu Xiao-Dong Li Xin Song |
| author_facet | Yu-Hao Wu Yue-Fei Wu Zi-Qin Zhu Qing Wang Li-Wu Fan Zi-Tao Yu Xiao-Dong Li Xin Song |
| author_sort | Yu-Hao Wu |
| collection | DOAJ |
| description | High-temperature thermal desorption is effective for remediating organic-contaminated sites, but its damage to soil functions and high energy consumption raise concerns. In this work, the variation of fertility indicators of two soils with thermal treatment temperature was investigated experimentally. To overcome the difficulties in measuring soil thermophysical properties under sealing and high-temperature conditions, two apparatus matching with the Hot Disk device were established and by which massive data were measured. The results show that, as temperature rises up to 500 °C, the combustion and decomposition of organic components and soil minerals gradually enhance, leading to a decrease in most fertility indicators, but an increase in grain size and pH. Available phosphorus and exchangeable potassium decrease with temperature rise first, but increase over 400 °C. Soil thermal conductivity and specific heat are positively correlated with temperature and water content. Water diffusion will intensify over 40∼60 °C, leading to an intense increase in soil thermal conductivity. The results are expected to provide data basis and theoretical guidance for the comprehensive consideration of remediation effects, land reuse, and energy consumption in practical applications of thermal desorption remediation. |
| format | Article |
| id | doaj-art-be042b018b8f48b1ad0c215357c579c2 |
| institution | OA Journals |
| issn | 2590-1230 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Results in Engineering |
| spelling | doaj-art-be042b018b8f48b1ad0c215357c579c22025-08-20T01:58:34ZengElsevierResults in Engineering2590-12302024-12-012410363610.1016/j.rineng.2024.103636Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sitesYu-Hao Wu0Yue-Fei Wu1Zi-Qin Zhu2Qing Wang3Li-Wu Fan4Zi-Tao Yu5Xiao-Dong Li6Xin Song7Institute of Thermal Science and Power Systems, School of Energy Engineering, Zhejiang University, Hangzhou 310027, China; State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, ChinaInstitute of Thermal Science and Power Systems, School of Energy Engineering, Zhejiang University, Hangzhou 310027, China; State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, ChinaSchool of Economics and Management, Tsinghua University, Beijing 100084, China; Corresponding authors.Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaInstitute of Thermal Science and Power Systems, School of Energy Engineering, Zhejiang University, Hangzhou 310027, China; State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; Corresponding authors.Institute of Thermal Science and Power Systems, School of Energy Engineering, Zhejiang University, Hangzhou 310027, China; State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, ChinaInstitute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, ChinaHigh-temperature thermal desorption is effective for remediating organic-contaminated sites, but its damage to soil functions and high energy consumption raise concerns. In this work, the variation of fertility indicators of two soils with thermal treatment temperature was investigated experimentally. To overcome the difficulties in measuring soil thermophysical properties under sealing and high-temperature conditions, two apparatus matching with the Hot Disk device were established and by which massive data were measured. The results show that, as temperature rises up to 500 °C, the combustion and decomposition of organic components and soil minerals gradually enhance, leading to a decrease in most fertility indicators, but an increase in grain size and pH. Available phosphorus and exchangeable potassium decrease with temperature rise first, but increase over 400 °C. Soil thermal conductivity and specific heat are positively correlated with temperature and water content. Water diffusion will intensify over 40∼60 °C, leading to an intense increase in soil thermal conductivity. The results are expected to provide data basis and theoretical guidance for the comprehensive consideration of remediation effects, land reuse, and energy consumption in practical applications of thermal desorption remediation.http://www.sciencedirect.com/science/article/pii/S2590123024018796Organic-contaminated soilThermal desorptionHigh temperatureFertilityThermal conductivity |
| spellingShingle | Yu-Hao Wu Yue-Fei Wu Zi-Qin Zhu Qing Wang Li-Wu Fan Zi-Tao Yu Xiao-Dong Li Xin Song Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sites Results in Engineering Organic-contaminated soil Thermal desorption High temperature Fertility Thermal conductivity |
| title | Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sites |
| title_full | Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sites |
| title_fullStr | Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sites |
| title_full_unstemmed | Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sites |
| title_short | Effects of thermal desorption temperature up to 500 °C on the thermophysical properties and fertility of soil in organic-contaminated sites |
| title_sort | effects of thermal desorption temperature up to 500 °c on the thermophysical properties and fertility of soil in organic contaminated sites |
| topic | Organic-contaminated soil Thermal desorption High temperature Fertility Thermal conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S2590123024018796 |
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