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Abstract
Novel recyclable chlorella pyrenoidosa-derived biochar (CP-BC) supported nanoscale zero-valent iron composite (nZVI@CP-BC) was developed via an in-situ liquid-phase chemical reduction-deposition method. The obtained adsorbent kept prominent hexavalent chromium (Cr(VI)) removal capacity with a broad pH range (3.0–11.0). Also, these findings revealed that the removal performance of Cr(VI) via nZVI@CP-BC was 1.37, 6.67 and 1.25 times more than that of pristine nZVI, unmodified CP-BC and nZVI + CP-BC, respectively. The exceptional Cr(VI) removal benefited from the combination of high-reactivity nZVI and CP-BC resulting in an effective synergy. The physicochemical property of the nZVI@CP-BC was systematically elucidated utilizing multiple characterizations. It is launched that the Cr(VI) molecules were converted into Cr(Ⅲ) mainly via surface adsorption and chemical reduction. And CP-BC may regulate beneficial conditions for Cr(VI) chemical reduction reaction via largely mediating solution pH and electron transfer, which showed a rational reaction mechanism of promoted removal of Cr(VI) under a broad working pH range. The corrosion mechanism of nZVI in the whole reaction was also studied thoroughly. This work indicates that this novel nZVI@CP-BC would be a prominent material for the preferable remediation of Cr(VI)-bearing wastewater.
Original language | English |
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Article number | 125207 |
Number of pages | 15 |
Journal | Separation and Purification Technology |
Volume | 330 |
Early online date | 28 Sept 2023 |
DOIs | |
Publication status | Published - 1 Feb 2024 |
Bibliographical note
Acknowledgement:This work was supported by the National Natural Science Foundation of China (NSFC, Grant No. 51968031), the Engineering and Physical Sciences Research Council Impact Acceleration Accounts Developing Leaders (Grant No. 1001634), and EU H2020 project NanoSolveIT (Grant Agreement 814572), RiskGone (Grant Agreement 814425), NanoCommons (Grant Agreement 731032).
Keywords
- Cr(VI) removal
- Amorphous nZVI
- Corrosion mechanism
- Broad working pH
- Effective synergy
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Dive into the research topics of 'Homogeneous dispersion of amorphous nanoscale zero-valent iron supported on chlorella-derived biochar: In-situ synthesis and application mechanism for Cr(VI) removal over a wide pH range'. Together they form a unique fingerprint.Projects
- 3 Finished
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H2020_RIA_NANOCOMMONS_CO-ORDINATOR
Valsami-Jones, E., Lynch, I. & Gkoutos, G.
1/01/18 → 30/06/22
Project: EU