Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated Sites
In situ chemical oxidation (ISCO) is commonly used for the remediation of contaminated sites, and molecular oxygen (O<sub>2</sub>) after activation by aquifer constituents and artificial remediation agents has displayed potential for efficient and selective removal of soil and groundwate...
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MDPI AG
2024-10-01
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| Series: | Toxics |
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| author | Fangru He Lianrui Xu Hongyang Wang Chuanjia Jiang |
| author_facet | Fangru He Lianrui Xu Hongyang Wang Chuanjia Jiang |
| author_sort | Fangru He |
| collection | DOAJ |
| description | In situ chemical oxidation (ISCO) is commonly used for the remediation of contaminated sites, and molecular oxygen (O<sub>2</sub>) after activation by aquifer constituents and artificial remediation agents has displayed potential for efficient and selective removal of soil and groundwater contaminants via ISCO. In particular, Fe-based materials are actively investigated for O<sub>2</sub> activation due to their prominent catalytic performance, wide availability, and environmental compatibility. This review provides a timely overview on O<sub>2</sub> activation by Fe-based materials (including zero-valent iron-based materials, iron sulfides, iron (oxyhydr)oxides, and Fe-containing clay minerals) for degradation of organic pollutants. The mechanisms of O<sub>2</sub> activation are systematically summarized, including the electron transfer pathways, reactive oxygen species formation, and the transformation of the materials during O<sub>2</sub> activation, highlighting the effects of the coordination state of Fe atoms on the capability of the materials to activate O<sub>2</sub>. In addition, the key factors influencing the O<sub>2</sub> activation process are analyzed, particularly the effects of organic ligands. This review deepens our understanding of the mechanisms of O<sub>2</sub> activation by Fe-based materials and provides further insights into the application of this process for in situ remediation of organic-contaminated sites. |
| format | Article |
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| institution | Kabale University |
| issn | 2305-6304 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
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| series | Toxics |
| spelling | doaj-art-a75d805ea2c84435a033fb2ee1d0c88f2024-11-26T18:23:42ZengMDPI AGToxics2305-63042024-10-01121177310.3390/toxics12110773Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated SitesFangru He0Lianrui Xu1Hongyang Wang2Chuanjia Jiang3College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, ChinaCollege of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, ChinaState Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaCollege of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tianjin 300350, ChinaIn situ chemical oxidation (ISCO) is commonly used for the remediation of contaminated sites, and molecular oxygen (O<sub>2</sub>) after activation by aquifer constituents and artificial remediation agents has displayed potential for efficient and selective removal of soil and groundwater contaminants via ISCO. In particular, Fe-based materials are actively investigated for O<sub>2</sub> activation due to their prominent catalytic performance, wide availability, and environmental compatibility. This review provides a timely overview on O<sub>2</sub> activation by Fe-based materials (including zero-valent iron-based materials, iron sulfides, iron (oxyhydr)oxides, and Fe-containing clay minerals) for degradation of organic pollutants. The mechanisms of O<sub>2</sub> activation are systematically summarized, including the electron transfer pathways, reactive oxygen species formation, and the transformation of the materials during O<sub>2</sub> activation, highlighting the effects of the coordination state of Fe atoms on the capability of the materials to activate O<sub>2</sub>. In addition, the key factors influencing the O<sub>2</sub> activation process are analyzed, particularly the effects of organic ligands. This review deepens our understanding of the mechanisms of O<sub>2</sub> activation by Fe-based materials and provides further insights into the application of this process for in situ remediation of organic-contaminated sites.https://www.mdpi.com/2305-6304/12/11/773oxygen activationFe-based materialsreactive oxygen speciesorganic pollutantsgroundwater contamination |
| spellingShingle | Fangru He Lianrui Xu Hongyang Wang Chuanjia Jiang Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated Sites Toxics oxygen activation Fe-based materials reactive oxygen species organic pollutants groundwater contamination |
| title | Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated Sites |
| title_full | Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated Sites |
| title_fullStr | Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated Sites |
| title_full_unstemmed | Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated Sites |
| title_short | Recent Progress in Molecular Oxygen Activation by Iron-Based Materials: Prospects for Nano-Enabled In Situ Remediation of Organic-Contaminated Sites |
| title_sort | recent progress in molecular oxygen activation by iron based materials prospects for nano enabled in situ remediation of organic contaminated sites |
| topic | oxygen activation Fe-based materials reactive oxygen species organic pollutants groundwater contamination |
| url | https://www.mdpi.com/2305-6304/12/11/773 |
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