Simply closing the reactor improves the electron efficiency of zerovalent iron towards various metal(loid)s removal

2020 ◽  
Author(s):  
Peng Fan ◽  
Xiaohong Guan ◽  
Guangfeng Wei ◽  
Lina Li
Keyword(s):  
Zerovalent Iron ◽  
Electron Efficiency

Influence of coexisting ions on the electron efficiency of sulfidated zerovalent iron toward Se(VI) removal

2019 ◽  
Vol 378 ◽  
pp. 122124 ◽  
Author(s):  
Jinfeng Ling ◽  
Junlian Qiao ◽  
Yadan Song ◽  
Yuankui Sun
Keyword(s):  
Zerovalent Iron ◽  
Electron Efficiency ◽  
Coexisting Ions

Enhanced reduction of p-nitrophenol by zerovalent iron modified with carbon quantum dots

2021 ◽  
Vol 285 ◽  
pp. 119829
Author(s):  
Peng Fan ◽  
Xuanjun Zhang ◽  
Huanhuan Deng ◽  
Xiaohong Guan
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Zerovalent Iron

scholarly journals Removal of hexavalent chromium from wastewater by Cu/Fe bimetallic nanoparticles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jien Ye ◽  
Yi Wang ◽  
Qiao Xu ◽  
Hanxin Wu ◽  
Jianhao Tong ◽  
...  
Keyword(s):  
Hexavalent Chromium ◽  
Removal Efficiency ◽  
Photoelectron Spectroscopy ◽  
Bimetallic Nanoparticles ◽  
Chemical Reduction ◽  
Particle Surface ◽  
Zerovalent Iron ◽  
Order Model ◽  
X Ray ◽  
Nanoscale Zerovalent Iron

AbstractPassivation of nanoscale zerovalent iron hinders its efficiency in water treatment, and loading another catalytic metal has been found to improve the efficiency significantly. In this study, Cu/Fe bimetallic nanoparticles were prepared by liquid-phase chemical reduction for removal of hexavalent chromium (Cr(VI)) from wastewater. Synthesized bimetallic nanoparticles were characterized by transmission electron microscopy, Brunauer–Emmet–Teller isotherm, and X-ray diffraction. The results showed that Cu loading can significantly enhance the removal efficiency of Cr(VI) by 29.3% to 84.0%, and the optimal Cu loading rate was 3% (wt%). The removal efficiency decreased with increasing initial pH and Cr(VI) concentration. The removal of Cr(VI) was better fitted by pseudo-second-order model than pseudo-first-order model. Thermodynamic analysis revealed that the Cr(VI) removal was spontaneous and endothermic, and the increase of reaction temperature facilitated the process. X-ray photoelectron spectroscopy (XPS) analysis indicated that Cr(VI) was completely reduced to Cr(III) and precipitated on the particle surface as hydroxylated Cr(OH)3 and CrxFe1−x(OH)3 coprecipitation. Our work could be beneficial for the application of iron-based nanomaterials in remediation of wastewater.

Advances in metal(loid) oxyanion removal by zerovalent iron: Kinetics, pathways, and mechanisms

Chemosphere ◽  
2021 ◽  
pp. 130766
Author(s):  
Xiao Wang ◽  
Yue Zhang ◽  
Zhiwei Wang ◽  
Chunhua Xu ◽  
Paul G. Tratnyek
Keyword(s):  
Zerovalent Iron ◽  
Iron Kinetics

Hydroxyl Radical-Involving p-Nitrophenol Oxidation during Its Reduction by Nanoscale Sulfidated Zerovalent Iron under Anaerobic Conditions

2021 ◽  
Vol 55 (4) ◽  
pp. 2403-2410
Author(s):  
Xike Tian ◽  
Xiang Wang ◽  
Yulun Nie ◽  
Chao Yang ◽  
Dionysios D. Dionysiou
Keyword(s):  
Hydroxyl Radical ◽  
Zerovalent Iron ◽  
Anaerobic Conditions

scholarly journals The enhanced reduction of bromate by highly reactive and dispersive green nano-zerovalent iron (G-NZVI) synthesized with onion peel extract

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 5008-5018
Author(s):  
Olga Lem ◽  
Sunho Yoon ◽  
Sungjun Bae ◽  
Woojin Lee
Keyword(s):  
Surface Oxidation ◽  
Zerovalent Iron ◽  
Onion Peel ◽  
Nano Zerovalent Iron ◽  
First Time ◽  
Onion Peel Extract ◽  
Peel Extract

In this study, novel green nano-zerovalent iron (G-NZVI) is synthesized for the first time using onion peel extract for the prevention of rapid surface oxidation and the enhancement of particle dispersibility with a high reductive capacity.

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