New Insights into the Role of Crystalline Fe 3 P in Phosphatized Zerovalent Iron for Enhancing Advanced Oxidation Processes and Storage Stability
Zerovalent iron (ZVI) is a widely utilized remediation agent for contaminated soil and groundwater; however, it has consistently faced the challenge of balancing catalytic activity with storage stability. Herein, submicron ZVI particles were phosphatized to produce phosphatized ZVI (P-ZVI), which wa...
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| Published in: | Environmental science & technology Vol. 59; no. 12; p. 6319 |
|---|---|
| Main Authors: | , , , , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
01.04.2025
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| Subjects: | |
| ISSN: | 1520-5851 |
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| Abstract | Zerovalent iron (ZVI) is a widely utilized remediation agent for contaminated soil and groundwater; however, it has consistently faced the challenge of balancing catalytic activity with storage stability. Herein, submicron ZVI particles were phosphatized to produce phosphatized ZVI (P-ZVI), which was employed to activate peroxydisulfate (PDS) for phenol degradation. As anticipated, phosphatization significantly enhanced both the storage stability (>10 months vs 1 d) and catalytic activity (4.37 vs 0.12 L m
h
) of ZVI compared to unphosphatized counterparts attributed to the formation of a crystalline Fe
P shell on P-ZVI. This Fe
P shell selectively interacts with H
O/O
/PDS, maintaining the stability of P-ZVI under high humidity and oxygen conditions while creating mass transfer channels that enhance reactivity in the presence of PDS. Characterization results from the reaction process demonstrated that the Fe
P shell activated PDS through both direct (via Fe cations) and indirect pathways (through a phosphorus anion-mediated Fe
/Fe
cycle), generating reactive species and facilitating mass transfer between core Fe
and external PDS for efficient PDS activation and phenol degradation. This study elucidates how constructing an Fe
P shell can realize selective activation of PDS while simultaneously enhancing both the storage and catalytic stabilities of ZVI, thereby boosting the practical application of PDS-based advanced oxidation processes in various environmental remediation. |
|---|---|
| AbstractList | Zerovalent iron (ZVI) is a widely utilized remediation agent for contaminated soil and groundwater; however, it has consistently faced the challenge of balancing catalytic activity with storage stability. Herein, submicron ZVI particles were phosphatized to produce phosphatized ZVI (P-ZVI), which was employed to activate peroxydisulfate (PDS) for phenol degradation. As anticipated, phosphatization significantly enhanced both the storage stability (>10 months vs 1 d) and catalytic activity (4.37 vs 0.12 L m
h
) of ZVI compared to unphosphatized counterparts attributed to the formation of a crystalline Fe
P shell on P-ZVI. This Fe
P shell selectively interacts with H
O/O
/PDS, maintaining the stability of P-ZVI under high humidity and oxygen conditions while creating mass transfer channels that enhance reactivity in the presence of PDS. Characterization results from the reaction process demonstrated that the Fe
P shell activated PDS through both direct (via Fe cations) and indirect pathways (through a phosphorus anion-mediated Fe
/Fe
cycle), generating reactive species and facilitating mass transfer between core Fe
and external PDS for efficient PDS activation and phenol degradation. This study elucidates how constructing an Fe
P shell can realize selective activation of PDS while simultaneously enhancing both the storage and catalytic stabilities of ZVI, thereby boosting the practical application of PDS-based advanced oxidation processes in various environmental remediation. |
| Author | Wang, Wenjiang Wang, Xinhua Zhang, Peng Rončević, Srd An D Sun, Hongwen |
| Author_xml | – sequence: 1 givenname: Xinhua surname: Wang fullname: Wang, Xinhua organization: Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China – sequence: 2 givenname: Peng orcidid: 0000-0001-5397-3824 surname: Zhang fullname: Zhang, Peng organization: Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China – sequence: 3 givenname: Wenjiang surname: Wang fullname: Wang, Wenjiang organization: CCCC-TDC Environmental Engineering Co.Ltd., Tianjin 300450, China – sequence: 4 givenname: Srd An D surname: Rončević fullname: Rončević, Srd An D organization: University Novi Sad, Fac Sci, Trg Dositeja Obradovica 3, Novi Sad 21000, Serbia – sequence: 5 givenname: Hongwen orcidid: 0000-0003-1948-5047 surname: Sun fullname: Sun, Hongwen organization: Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, Tianjin 300350, China |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/40107854$$D View this record in MEDLINE/PubMed |
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| Keywords | surface stability control peroxydisulfate activation PDS efficiency zerovalent iron phosphatization |
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| Snippet | Zerovalent iron (ZVI) is a widely utilized remediation agent for contaminated soil and groundwater; however, it has consistently faced the challenge of... |
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| SubjectTerms | Catalysis Ferric Compounds Iron - chemistry Oxidation-Reduction |
| Title | New Insights into the Role of Crystalline Fe 3 P in Phosphatized Zerovalent Iron for Enhancing Advanced Oxidation Processes and Storage Stability |
| URI | https://www.ncbi.nlm.nih.gov/pubmed/40107854 |
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