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

Costa, Regina C.C.; Moura, Flávia C.C.; Ardisson, José D.; Fabris, José Domingos; Lago, Rochel M.

doi:10.1016/j.apcatb.2008.01.039

Cited by 311 publications

(122 citation statements)

References 34 publications

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“…Zero valent iron has been widely used in different environmental treatment processes [16,17] and the direct electron transfer from Fe 0 to H 2 O 2 during a Fenton reaction is a very slow process at neutral pH [18]. However, Fe 0 /Fe 3 O 4 composite showed highly catalytic activity for the decomposition of H 2 O 2 as a result of an electron transfer process from metal to magnetite [18,19].…”

Section: Introductionmentioning

confidence: 99%

Degradation characteristics of humic acid over iron oxides/Fe0 core–shell nanoparticles with UVA/H2O2

Nie

Zhou

et al. 2010

Journal of Hazardous Materials

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a b s t r a c tIron oxides coated on Fe 0 core-shell nanospheres (nIOCI) were synthesized through the reduction of ferrous sulfate aqueous solution by sodium borohydride at ambient atmosphere. The catalyst was highly effective for the degradation of humic acid (HA) in the presence of H 2 O 2 and UVA at neutral pH. Under deoxygenated conditions in the dark, the generation of hydroxyl radicals in aqueous nIOCI dispersion verified its galvanic cell-like performance, which enhanced the interfacial electron transfer and led to its higher reactivity. By the total organic carbon, the absorbance of UV 254 , FTIR, the molecular weight distribution and the chemical fractional character analysis, the degradation process of HA was shown to proceed by the disappearance of aromaticity, the increase of hydrophilic fraction and aromatic ring openings into CO 2 and small organic acid. The treated HA showed much lower reactivity toward chlorine and the disinfection byproduct (DBP) formation potential was also greatly reduced. Moreover, it was found that the DBP formation potential more depended on the structure of the intermediates of HA degradation than TOC removal.Crown

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Section: Introductionmentioning

confidence: 99%

Degradation characteristics of humic acid over iron oxides/Fe0 core–shell nanoparticles with UVA/H2O2

Nie

Zhou

et al. 2010

Journal of Hazardous Materials

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“…With the merits of strong catalytic activity, great reserves and excellent environmental compatibility, magnetite has been widely applied in environmental remediation in these years [1][2][3][4][5], and its role in environmental self-purification also has become a research hotspot [6,7]. In the natural world, partial iron ions in the inverse spinel structure of magnetite are isomorphously replaced by some transition metal ions, e.g.…”

Section: Introductionmentioning

confidence: 99%

A comparative study about the effects of isomorphous substitution of transition metals (Ti, Cr, Mn, Co and Ni) on the UV/Fenton catalytic activity of magnetite

Zhong

Liang

Tan

et al. 2013

Journal of Molecular Catalysis A: Chemical

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“…nZVI nanoparticles coated with magnetic Fe 3 O 4 nanoparticle which could be removed easily with the help of an external magnetic field [108]. Such ZVI-Fe 3 O 4 nanocomposites form a heterogeneous Fenton-like system [109,110], which showed an increase in Cr(VI) removal efficiency from 48.8% (using bare nFe 3 O 4 ) to 96.4% (using nZVI-Fe 3 O 4 nanocomposites) in 2 h [19]. nZVI has also been assembled on magnetic Fe 3 O 4 /graphene nanocomposites to tackle both the drawbacks mentioned above, and it shows a Cr(VI) removal efficiency of 83.8%, following pseudo-second-order kinetics [111].…”

Section: Nanoadsorbents For Chromium Remediationmentioning

confidence: 99%

Removal of chromium from industrial effluents using nanotechnology: a review

Mitra

Sarkar

Sen

2017

Nanotechnol. Environ. Eng.

118

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The presence of chromium in industrial effluents has become a huge problem worldwide as hexavalent chromium is highly toxic to animals due to its ability to generate reactive oxygen species in cells. The trivalent state of chromium, on the other hand, is significantly less toxic and also serves as an essential element in trace amounts. When industries such as electroplating, tannery, dyeing and others release their effluents into water bodies, hexavalent chromium enters the food chain and, consequently, reaches humans in a biomagnified form. Many remediation processes for removal of hexavalent chromium have been researched and reviewed extensively. These include chemical reduction to trivalent chromium, solvent extraction, chelation and adsorption, among others. It has been generally concluded that adsorption (and/or subsequent reduction) of hexavalent chromium is the best method. However, relatively little is known about the potential of using nanoparticles as adsorbents for the removal of hexavalent chromium from industrial effluents. This method of nanoremediation is more effective than conventional remediation methods and is cost-effective for the industry in the long run. This article reviews the various remediation methods of hexavalent chromium, with emphasis on the field of nanoremediation.

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

Cited by 311 publications

References 34 publications

Degradation characteristics of humic acid over iron oxides/Fe0 core–shell nanoparticles with UVA/H2O2

Degradation characteristics of humic acid over iron oxides/Fe0 core–shell nanoparticles with UVA/H2O2

A comparative study about the effects of isomorphous substitution of transition metals (Ti, Cr, Mn, Co and Ni) on the UV/Fenton catalytic activity of magnetite

Removal of chromium from industrial effluents using nanotechnology: a review

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