Catalytic activity of different iron oxides: Insight from pollutant degradation and hydroxyl radical formation in heterogeneous Fenton-like systems

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.

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The constraints of transition metal substitutions (Ti, Cr, Mn, Co and Ni) in magnetite on its catalytic activity in heterogeneous Fenton and UV/Fenton reaction: From the perspective of hydroxyl radical generation

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2014.01.007 ◽

2014 ◽

Vol 150-151 ◽

pp. 612-618 ◽

Cited By ~ 71

Author(s):

Yuanhong Zhong ◽

Xiaoliang Liang ◽

Zisen He ◽

Wei Tan ◽

Jianxi Zhu ◽

...

Keyword(s):

Catalytic Activity ◽

Transition Metal ◽

Hydroxyl Radical ◽

Fenton Reaction ◽

Heterogeneous Fenton ◽

Radical Generation

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Heterogeneous Fenton Catalytic Removal of Organic Pollutant in Aqueous Solution by using Coal Gangue as a Catalyst

Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering) ◽

10.2174/2405520412666190806120033 ◽

2019 ◽

Vol 12 (4) ◽

pp. 312-325

Author(s):

Jiwei Zhang ◽

Jingjing Xu ◽

Shuaixia Liu ◽

Baoxiang Gu ◽

Feng Chen ◽

...

Keyword(s):

Aqueous Solution ◽

Hydrogen Peroxide ◽

Hydroxyl Radical ◽

Removal Rate ◽

Organic Pollutant ◽

Coal Gangue ◽

Ion Leakage ◽

Heterogeneous Fenton ◽

Solution Ph ◽

X Ray

Background: Coal gangue was used as a catalyst in heterogeneous Fenton process for the degradation of azo dye and phenol. The influencing factors, such as solution pH gangue concentration and hydrogen peroxide dosage were investigated, and the reaction mechanism between coal gangue and hydrogen peroxide was also discussed. Methods: Experimental results showed that coal gangue has the ability to activate hydrogen peroxide to degrade environmental pollutants in aqueous solution. Under optimal conditions, after 60 minutes of treatment, more than 90.57% of reactive red dye was removed, and the removal efficiency of Chemical Oxygen Demand (COD) up to 72.83%. Results: Both hydroxyl radical and superoxide radical anion participated in the degradation of organic pollutant but hydroxyl radical predominated. Stability tests for coal gangue were also carried out via the continuous degradation experiment and ion leakage analysis. After five times continuous degradation, dye removal rate decreased slightly and the leached Fe was still at very low level (2.24-3.02 mg L-1). The results of Scanning Electron Microscope (SEM), energy dispersive X-Ray Spectrometer (EDS) and X-Ray Powder Diffraction (XRD) indicated that coal gangue catalyst is stable after five times continuous reuse. Conclusion: The progress in this research suggested that coal gangue is a potential nature catalyst for the efficient degradation of organic pollutant in water and wastewater via the Fenton reaction.

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Catalytic activity of metals in heterogeneous Fenton-like oxidation of wastewater contaminants: a review

Environmental Chemistry Letters ◽

10.1007/s10311-021-01185-z ◽

2021 ◽

Author(s):

Sajid Hussain ◽

Eleonora Aneggi ◽

Daniele Goi

Keyword(s):

Catalytic Activity ◽

Emerging Contaminants ◽

Influencing Factor ◽

Oxidation Products ◽

Metal Oxidation ◽

Heterogeneous Fenton ◽

Solution Ph ◽

Copper Manganese ◽

Different Types ◽

Metallic Catalyst

AbstractInnovations in water technology are needed to solve challenges of climate change, resource shortages, emerging contaminants, urbanization, sustainable development and demographic changes. In particular, conventional techniques of wastewater treatment are limited by the presence of poorly biodegradable organic matter. Alternatively, recent Fenton, Fenton-like and hybrid processes appear successful for cleaning of different types of liquid wastewaters. Here, we review the application of metallic catalyst-H2O2 systems in the heterogeneous Fenton process. Each metallic catalyst-H2O2 system has unique redox properties due to metal oxidation state. Solution pH is a major influencing factor. Catalysts made of iron and cerium form stable complexes with oxidation products and H2O2, thus resulting in reduced activities. Copper forms transitory complexes with oxidation products, but copper catalytic activity is restored during the reaction. Silver and manganese do not form complexes. The catalyst performance for degradation and mineralization decreases in the order: manganese, copper, iron, silver, cerium, yet the easiness of practical application decreases in the order: copper, manganese, iron, silver, cerium.

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Myricetin affords protection against peroxynitrite-mediated DNA damage and hydroxyl radical formation

Food and Chemical Toxicology ◽

10.1016/j.fct.2011.06.066 ◽

2011 ◽

Vol 49 (9) ◽

pp. 2439-2444 ◽

Cited By ~ 36

Author(s):

Wei Chen ◽

Yudong Li ◽

Jianrong Li ◽

Qiang Han ◽

Libin Ye ◽

...

Keyword(s):

Dna Damage ◽

Hydroxyl Radical ◽

Radical Formation

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The Synthesis of Iron Oxides with Different Phases or Exposure Crystal Planes and their Catalytic Property for Propene Oxidation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.463-464.189 ◽

2012 ◽

Vol 463-464 ◽

pp. 189-193

Author(s):

Kong Zhai Li ◽

Masaaki Haneda ◽

Masakuni Ozawa

Keyword(s):

Catalytic Activity ◽

Iron Oxides ◽

Catalytic Property ◽

Significant Influence ◽

Catalytic Performance ◽

Selective Growth ◽

Crystal Plane ◽

Low Density ◽

Fe2o3 Nanoparticles ◽

Propene Oxidation

Maghemite (γ-FeSubscript text2OSubscript text3) and hematite (α-Fe2O3) nanoparticles with various dominant exposure crystal planes were prepared by several different methods. The structure and the reducibility of these materials were investigated by XRD, Raman and H2-TPR technologies, and their catalytic performance for propene oxidation was also discussed. The maghemite (γ-FeSubscript text2OSubscript text3) showed a better reducibility than hematite (α-FeSubscript text2OSubscript text3), but its activity for propene oxidation is relatively lower. The exposure crystal plane of hematite has a significant influence on its catalytic activity for propene oxidation. Among the prepared four samples, the hematite-1 sample showed the best activity. The selective growth of any planes with a relative low density of Fe atoms for the α-FeSubscript text2OSubscript text3 catalyst would lead to an obvious decrease in the catalytic activity.

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