Active iron species in the catalytic wet peroxide oxidation of phenol over pillared clays containing iron

Guélou, E.; Barrault, J.; Fournier, J.; Tatibouët, Jean‐Michel

doi:10.1016/s0926-3373(03)00003-1

Cited by 162 publications

(92 citation statements)

References 23 publications

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“…However, due to transference of the iron into the treated waters, additional separation steps are needed to remove it. To solve this drawback, several efforts have been done to develop heterogeneous catalysts containing non-leaching iron, which will be able to generate the desired hydroxyl radicals [5][6][7][8][9]. Nevertheless, the problem still remains, since many of these developed catalysts are barely stable and do leach under process operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Activated carbons treated with sulphuric acid: Catalysts for catalytic wet peroxide oxidation

et al. 2010

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Section: Introductionmentioning

confidence: 99%

Activated carbons treated with sulphuric acid: Catalysts for catalytic wet peroxide oxidation

et al. 2010

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“…The catalytic behavior of hectorite-like smectites containing Ni in the lattice has been investigated for the decomposition of 2-propanol [28]. Iron-containing smectites have been widely used in catalytic degradation [29][30][31], catalytic reduction [32,33], organic synthesis [34,35] and other processes.…”

Section: Catalytic Properties Of Smectitesmentioning

confidence: 99%

Geomaterials: their application to environmental remediation

Yamada

Tamura

Watanabe

et al. 2011

Science and Technology of Advanced Materials

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Geomaterials are materials inspired by geological systems originating from the billion years long history of the Earth. This article reviews three important classes of geomaterials. The first one is smectites-layered silicates with a cation-exchange capacity. Smectites are useful for removing pollutants and as intercalation compounds, catalysts and polymer nanocomposites. The second class is layered double hydroxides (LDHs). They have an anion-exchange capacity and are used as catalysts, catalyst precursors, sorbents and scavengers for halogens. The third class of geomaterials is zeolites-microporous materials with a cation-exchange capacity which are used for removing harmful cations. Zeolite composites with LDHs can absorb ammonium and phosphate ions in rivers and lakes, whereas zeolite/apatite composites can immobilize the radioactive iodine. These geomaterials are essential for environmental remediation.

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“…It was generally accepted that compared to Cu, Fe was easier to take part in the Al pillar, decorating the pillar or isomorphic substitution (Barrault et al, 1998;Galeano et al, 2010;Guélou et al, 2003). Therefore, there were fine structural and corresponding catalytic differences between Al-Fe-PILC and Al-Cu-PILC.…”

Section: Introductionmentioning

confidence: 99%

Catalytic wet peroxide oxidation of 4-chlorophenol over Al-Fe-, Al-Cu-, and Al-Fe-Cu-pillared clays: Sensitivity, kinetics and mechanism

Zhou

Zhang

et al. 2014

Applied Clay Science

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Al-Fe-, Al-Cu-, and Al-Fe-Cu-PILCs were synthesized, characterized and tested in the catalytic wet peroxide oxidation of 4-chlorophenol (4-CP). An apparent induction period followed by a rapid oxidation was observed during the Fenton-like reaction, and the whole reaction could be modeled well using a Fermi's kinetic equation (R 2 = 0.9938~0.9993). The generation of hydroxyl radicals (HO • ) from surface-catalyzed decomposition of H 2 O 2 was the oxidation cause whereas the dissolution of active metals was its result. Accordingly, induction period was the cause of heterogeneous surface activation (catalysis or modification) for more HO • formed by decreasing pH. 4-CP oxidation proceeded via 4-chlorocatechol (major) and hydroquinone (minor) pathways, along the formation of main intermediate (5-chloro-1,2,4-benzentriol). Finally besides CO 2 , H 2 O and Cl − two main compounds (I and II) formed, where the former was identified as 2,4-dioxopentanedioic acid whereas the latter as ferric-oxalate complex. There were marked structural and active differences between Al-Fe-PILC and Al-Cu-PILC in which compared to the latter, the former possessed higher SSA and activity but its optimal calcination temperature was lower and the induction time was also longer. In addition, compound II accounted for a considerable proportion in Al-Fe-PILC system whereas compound I was almost only component in Al-Cu-PILC system.

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Active iron species in the catalytic wet peroxide oxidation of phenol over pillared clays containing iron

Cited by 162 publications

References 23 publications

Activated carbons treated with sulphuric acid: Catalysts for catalytic wet peroxide oxidation

Activated carbons treated with sulphuric acid: Catalysts for catalytic wet peroxide oxidation

Geomaterials: their application to environmental remediation

Catalytic wet peroxide oxidation of 4-chlorophenol over Al-Fe-, Al-Cu-, and Al-Fe-Cu-pillared clays: Sensitivity, kinetics and mechanism

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