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Wu S, Yang Z, Wang F, Jin X, Kengara F, Xi K, Fang W, Yang W, Zhang Y. Effect of γ-Fe 2O 3 nanoparticles on the composition of montmorillonite and its sorption capacity for pyrene. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 813:151893. [PMID: 34826487 DOI: 10.1016/j.scitotenv.2021.151893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 11/18/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
Fe content and distribution on montmorillonite would probably enhance its sorption capacity for hydrophobic organic pollutants. Thus, Fe modified montmorillonites with different ratios of FeSO4·7H2O and Ca-montmorillonite were prepared. The results indicated that γ-Fe2O3 nanoparticles were not only generated at the montmorillonite surfaces, but that the γ-Fe2O3 also extended the edges of montmorillonite surfaces. The sorption capacities for pyrene were enhanced and even reached 834.79 μg g-1 with increase in ferrous iron content, but were then suppressed due to aggregation of γ-Fe2O3 on montmorillonite surfaces. Furthermore, pyrene was directly observed on γ-Fe2O3-montmorillonite surfaces with a lattice spacing parameter of approximately 0.27 nm, indicating that a new phase that mainly contained pyrene was generated during the sorption process. Additionally, after regenerating the γ-Fe2O3-montmorillonite composites, they could be reused for at least 5 cycles. It is therefore proposed that the prepared γ-Fe2O3-montmorillonite could be exploited as a potential green composite for remediation of hydrophobic organic pollutants in soil and sediment.
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Affiliation(s)
- Shixi Wu
- Center of Analysis and Testing, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Zhen Yang
- Center of Analysis and Testing, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Fang Wang
- CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Xin Jin
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Fredrick Kengara
- School of Pure and Applied Sciences, Bomet University College, P.O. Box 701, 20400 Bomet, Kenya
| | - Kai Xi
- Center of Analysis and Testing, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Wenwen Fang
- Center of Analysis and Testing, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Weiben Yang
- Center of Analysis and Testing, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China
| | - Yinping Zhang
- Center of Analysis and Testing, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210046, China; CAS Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
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Potter ME. Down the Microporous Rabbit Hole of Silicoaluminophosphates: Recent Developments on Synthesis, Characterization, and Catalytic Applications. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02278] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Matthew E. Potter
- Department of Chemistry, University of Southampton, Southampton, Hampshire SO17 1BJ, United Kingdom
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