Niobian iron oxides as heterogeneous Fenton catalysts for environmental remediation

LACAME 2008 ◽  
2009 ◽  
pp. 27-34
Author(s):  
Diana Q. L. Oliveira ◽  
Luiz C. A. Oliveira ◽  
Enver Murad ◽  
José D. Fabris ◽  
Adilson C. Silva ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Environmental Remediation ◽  
Heterogeneous Fenton

Niobian iron oxides as heterogeneous Fenton catalysts for environmental remediation

2009 ◽  
Vol 195 (1-3) ◽  
pp. 27-34 ◽  
Author(s):  
Diana Q. L. Oliveira ◽  
Luiz C. A. Oliveira ◽  
Enver Murad ◽  
José D. Fabris ◽  
Adilson C. Silva ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Environmental Remediation ◽  
Heterogeneous Fenton

Application of S2O82-/FexOy Solid Super Acid as a Heterogeneous Fenton-Like Catalyst for the Degradation of Orange IV in Water

2010 ◽  
Vol 150-151 ◽  
pp. 1710-1713
Author(s):  
Ying Jie Zhang ◽  
Yue Xiao Tian ◽  
Da Peng Li ◽  
Guo Rui Liu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Iron Oxides ◽  
Catalytic Decomposition ◽  
Optimal Conditions ◽  
Heterogeneous Fenton ◽  
Effective Catalyst ◽  
Preparation Conditions ◽  
Super Acid ◽  
Decomposition Of H2o2

A new Fenton-like catalyst was prepared to degrade Orange IV in water by catalytic decomposition of H2O2. The optimal preparation conditions were discussed. The catalytic activity of catalyst was evaluated by the degradation of Orange IV and the decomposition of H2O2. The results show that solid super acid (S2O82-/FexOy) soaked in (NH4)2S2O8 is the most effective catalyst among the synthesized iron oxides soaked in other oxidants. The optimal conditions for solid super acid preparation are calcined at 500 for 2 h in the air.

Highly active heterogeneous Fenton-like systems based on Fe0/Fe3O4 composites prepared by controlled reduction of iron oxides

2008 ◽  
Vol 83 (1-2) ◽  
pp. 131-139 ◽  
Author(s):  
Regina C.C. Costa ◽  
Flávia C.C. Moura ◽  
J.D. Ardisson ◽  
J.D. Fabris ◽  
R.M. Lago
Keyword(s):  
Iron Oxides ◽  
Heterogeneous Fenton ◽  
Highly Active ◽  
Reduction Of Iron

Preparative treatment with NaOH to selectively concentrate iron oxides of a Chilean volcanic soil material to produce effective heterogeneous Fenton catalyst

2011 ◽  
Vol 203 (1-3) ◽  
pp. 59-66 ◽  
Author(s):  
Valentina Manzo ◽  
Carmen Pizarro ◽  
María Angélica Rubio ◽  
Luis Carlos Duarte Cavalcante ◽  
Vijayendra Kumar Garg ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Volcanic Soil ◽  
Heterogeneous Fenton ◽  
Soil Material ◽  
Fenton Catalyst ◽  
Heterogeneous Fenton Catalyst

Preparative treatment with NaOH to selectively concentrate iron oxides of a Chilean volcanic soil material to produce effective heterogeneous Fenton catalyst

LACAME 2010 ◽  
2011 ◽  
pp. 217-224
Author(s):  
Valentina Manzo ◽  
Carmen Pizarro ◽  
María Angélica Rubio ◽  
Luis Carlos Duarte Cavalcante ◽  
Vijayendra Kumar Garg ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Volcanic Soil ◽  
Heterogeneous Fenton ◽  
Soil Material ◽  
Fenton Catalyst ◽  
Heterogeneous Fenton Catalyst

Degradation of Chrysoidin Dye by Fenton and Photo-Fenton Reaction Using Natural Marmatite as Catalyst

2014 ◽  
Vol 17 (2) ◽  
Author(s):  
J. H. Ramirez ◽  
H. R. Zea ◽  
Thomas Cramer
Keyword(s):  
Photocatalytic Degradation ◽  
Gold Deposit ◽  
Iron Oxides ◽  
Azo Dye ◽  
Fenton Reaction ◽  
Active Material ◽  
Heterogeneous Fenton ◽  
Solution Ph ◽  
Photo Catalyst ◽  
Degradation Of Azo Dye

AbstractHeterogeneous dark Fenton and photocatalytic degradation of azo-dye chrysoidin were studied using natural marmatite from a Colombian gold deposit as catalysts. Marmatite is composed of zinc sulfates, iron sulfates and iron oxides; due to this composition marmatite is an active material in the degradation of chrysoidin. Marmatite was characterized by SEM, XRD, BET and XRF. Experimental results allow concluding that the dye was oxidized (degraded) in both, heterogeneous Fenton and photo-catalyst reactions, using Marmatite as catalyst. The variables considered were solution pH, marmatite concentration, C

Highly Active Heterogeneous Fenton-Like Systems Based on Fe3O4 Nanoparticles

2011 ◽  
Vol 233-235 ◽  
pp. 487-490 ◽  
Author(s):  
Wei Wang ◽  
Tie Long Li ◽  
Ying Liu ◽  
Ming Hua Zhou
Keyword(s):  
Photoelectron Spectroscopy ◽  
Environmental Remediation ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Catalytic Efficiency ◽  
Alkaline Media ◽  
Homogeneous Catalyst ◽  
Fenton Reagent ◽  
Heterogeneous Fenton ◽  
X Ray

In this work, magnetic nanoscale Fe3O4 particles were synthesized through coprecipitation of Fe(II) and Fe(III) in alkaline media. The structure, composition and properties of the nanoparticles prepared were characterized by transmission electron microscope (TEM), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS) and vibrating sample magnetometer (VSM). Catalytic efficiency of the Fe3O4 nanoparticles was tested in degradation of phenol solution. At pH 7, the chemical oxygen demand (COD) removal rate reached 70% in 3 hours. The heterogeneous catalyst exhibited efficient catalytic activity close to that of iron homogeneous catalyst but with less than 3% leaching of irons cation. Further, it performed well under much wider pH range (pH 3~7) compared to classic Fenton reagent, providing potential alternative as a novel heterogeneous Fenton catalyst for environmental remediation.

Adsorption-enhanced catalytic wet peroxide oxidation of aromatic compounds on ionothermally synthesised copper-doped magnetite magnetic nanoparticles

2020 ◽  
Vol 17 (6) ◽  
pp. 426 ◽  
Author(s):  
Xuanlin Huang ◽  
Wei Du ◽  
Rong Chen ◽  
Fengxi Chen
Keyword(s):  
Magnetic Nanoparticles ◽  
Aromatic Compounds ◽  
Environmental Remediation ◽  
Active Sites ◽  
Peroxide Oxidation ◽  
Heterogeneous Fenton ◽  
Wet Peroxide Oxidation ◽  
Synergistic Activation ◽  
Catalytic Wet Peroxide Oxidation ◽  
Fe3o4 Mnps

Environmental contextAromatic compounds are major organic pollutants that are hard to clean up by either adsorption or biological treatment processes. We synthesised Cu-doped Fe3O4 magnetic nanoparticles and showed that they efficiently degrade various aromatic compounds with H2O2 under mild conditions. This active and stabile heterogeneous Fenton-like catalyst has the potential for various environmental applications. AbstractMagnetite magnetic nanoparticles (Fe3O4 MNPs) have great potential in environmental remediation owing to the intrinsic peroxidase-like activity, which is unfortunately not strong enough to activate H2O2 for practical applications. Herein, Cu-doped Fe3O4 MNPs (Fe2.88Cu0.12O4) were ionothermally synthesised and demonstrated as a highly efficient and stable heterogeneous Fenton-like catalyst for the catalytic wet peroxide oxidation of aromatic compounds with H2O2 at pH ~7 and 25°C. Theoretical calculations found that the interaction between aromatic compounds (e.g. orange G) and Cu2+ through a terminal end-on binding mode with moderate strength was favourable to enhance their adsorption on Fe2.88Cu0.12O4. In addition, copper dopants increased the decomposition rate of H2O2 at 25°C about four-fold (0.584h−1 on Fe2.88Cu0.12O4 versus 0.153h−1 on Fe3O4), which is attributed to efficient redox cycling of iron and copper ions for synergistic activation of H2O2. Copper-enhanced adsorption of aromatic compounds, together with synergistic activation of H2O2 by surface iron and copper active sites, explained the higher catalytic activity of Fe2.88Cu0.12O4. This study provided new insight for improving the catalytic performance of magnetite-based heterogeneous catalysts for various environmental and biomedical applications.

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