Sepiolite/Fe3O4 composite for effective degradation of diuron
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Description
A novel sepiolite-supported Fe3O4 magnetite (SepMag) composite was prepared for diuron degradation. The samples were characterized by X-ray powder diffraction (XRD), X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR), N2 adsorption-desorption and BET surface area analysis, scanning electron microscope (SEM) as well as transmission electron microscope (TEM). The chemical state of Fe in SepMag composite before and after degradation experiments was characterized by X-ray photoelectron spectroscopy (XPS). The enhanced degradation efficiency for diuron was attributed to the effective generation of hydroxyl radical in ultrasound/SepMag/H2O2 system. The degradation rate of diuron depended upon the composite amount, hydrogen peroxide dosage, initial pH of solution and temperature. The degradation reaction was also optimized by changing the ultrasound intensity and Fe3O4 content in the composites. Moreover, mineralization and degradation pathway were evaluated on the basis of total organic carbon and liquid chromatography mass spectrometry. It was confirmed that with the assistance of ultrasound treatment SepMag composite has potential advantages for the removal of diuron from aqueous solution.
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| ID Code: | 132488 | ||
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| Item Type: | Contribution to Journal (Journal Article) | ||
| Refereed: | Yes | ||
| ORCID iD: |
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| Measurements or Duration: | 9 pages | ||
| Keywords: | Fe3O4, composite, degradation, diuron, sepiolite, Degradation, Composite, Diuron, Sepiolite, Fe O | ||
| DOI: | 10.1016/j.clay.2019.105243 | ||
| ISSN: | 0169-1317 | ||
| Pure ID: | 40819028 | ||
| Divisions: | Past > Institutes > Institute for Future Environments Past > QUT Faculties & Divisions > Science & Engineering Faculty |
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| Funding Information: | This work was financially supported by QUT Science and Engineering Faculty and the Institute for Future Environments , the National Key R&D Program of China ( 2017YFB0310903 ), the National Science Fund for distinguished Young Scholars ( 51225403 ), the Strategic Priority Research Program of Central South University ( ZLXD2017005 ), the Hunan Provincial Science and Technology Project ( 2016RS2004 , 2015TP1006 , 2018WK4023 ) and the Changsha Science and Technology Project ( kc1702029 ). Kai Hou would like to thank David Marshall, Elizabeth Graham, Shane Russell, Jamie Riches, Llew Rintoul and Chris East (QUT) for their friendly help. | ||
| Copyright Owner: | Consult author(s) regarding copyright matters | ||
| Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||
| Deposited On: | 05 Sep 2019 23:32 | ||
| Last Modified: | 31 Jul 2024 23:01 |
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