Fenton Degradation of Organic Compounds Promoted by Dyes under Visible Irradiation

Key Laboratory of Photochemistry, Center for Molecular Science, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080, China.
Environmental Science and Technology (Impact Factor: 5.33). 08/2005; 39(15):5810-5. DOI: 10.1021/es050001x
Source: PubMed


The influence of dyes on the Fenton reaction of organic compounds under visible irradiation (lambda > 450 nm) was examined. It was found that the presence of dyes could accelerate greatly the Fenton reaction of organic compounds such as salicylic acid, sodium benzenesulfonate, benzyltrimethylammonium chloride, and trichloroacetic acid under visible irradiation and that a complete mineralization of those compounds could also be achieved. The dyes such as Alizarin Violet 3B which has an anthraquinone structure unit showed much more significant effect on the reaction than the dyes such as malachite green without the quinone unit. A reaction mechanism of dye AV as a cocatalyst in the photo-Fenton reaction of organic compounds under visible irradiation is proposed based on the cycle of Fe(3+)/Fe(2+) catalyzed by quinone species and an electron transfer from the excited dye molecule to Fe3+.

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Available from: Chuncheng Chen, Oct 02, 2015
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    • "During the last two decades, the catalytic effects of different redox mediators on the degradation processes of pollutants have been studied, which include anthraquinone dyes, humic acid (HA), fulvic acid (FA) and some aromatic compounds. Ma et al. [13] demonstrated that the presence of dyes could accelerate greatly the Fenton reaction of organic compounds. The dyes such as Alizarin Violet 3B which has an anthraquinone structure unit showed much more significant effect than the dyes such as malachite green without the quinone unit. "
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    ABSTRACT: Polyhydroquinone, an immobilized quinone, was synthesized by oxidative polymerization of hydroquinone. The polymers obtained were characterized by Fourier-transform infrared spectra and cyclic voltammetry. Polyhydroquinone is a redox-active polymer with quinone/hydroquinone redox active units in the main chain. The influence of polyhydroquinone in the Fe3O4/persulfate system was examined. It was found that the addition of polyhydroquinone in Fe3O4/persulfate system increased the oxidation rate of Rhodamine B (RhB), which was ascribed to their role as an electron shuttle. The presence of polyhydroquinone successfully builds up two cycles, one semiquinone/quinone cycle, another cycle of Fe(III)/Fe(II) induced by quinone. The presence of phenolic and quinonoid moieties in the structure of polyhydroquinone provide for their ability to reduce Fe(III), thereby assisting the redox cycling of Fe and increasing degradation of the target substrate.
    Chemical Engineering Journal 03/2014; 240:338–343. DOI:10.1016/j.cej.2013.11.090 · 4.32 Impact Factor
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    • "The mechanism of Fenton's oxidation process is established, which is reported in the literature (Jiahai et al., 2005) as: complexes indicating mineralization of BR molecules. "
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    ABSTRACT: Oxidative degradation of Brilliant Red X–3B has been carried out using Fenton’s reagent in dark and in presence of light. The degradation rate was increased, using Fenton’s process, in the order of Dark < Visible < UV. At pH 3.3, the maximum Fenton and photo–Fenton effect were noticed. At [H2O2]/[Fe(III)]=3.5, a steady Fenton effect was observed, meanwhile at [H2O2]/[Fe(III)]=0.7, Fenton process in dark minimized the photo effect. The degradation rate was positively influenced by the temperature where, the activation energy of degradation was evaluated as 36.98 kJ mol–1.
    International Journal of Chemical Reactor Engineering 01/2010; Volume 8:Article A144. DOI:10.2202/1542-6580.2268 · 0.79 Impact Factor
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    • "Among AOPs, oxidation using Fenton's reagent is an attractive and effective technology for the degradation of a large number of hazardous and organic pollutants because of the lack of toxicity of the reagents, eventually leaving no residues and the simplicity of the technology [7]. The degradation mechanism of organic pollutants by Fenton reaction is shown below [8] [9]: "
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    ABSTRACT: It is difficult to remove Ni(II) from NiEDTA wastewater by many conventional processes. A new method for removing Ni(II) from NiEDTA wastewater by Fenton and Fenton-like reaction followed by hydroxide precipitation presents an important breakthrough. This treatment process is referred to as Fenton/Fenton-like reaction-hydroxide precipitation (FR-HP) process. This study investigated the use of FR-HP process for the removal of Ni(II) from NiEDTA complex wastewater. The removal efficiency of Ni(II) by FR-HP process was investigated and the kinetics of the two processes was studied. Results indicated that the removal efficiency was strongly dependent on the initial concentration of Fe2+ or Fe3+ and H2O2, initial and precipitation pH and temperature. Both FR-HP processes can effectively remove Ni(II). At optimal operation conditions, the removal efficiency of Ni(II) were 92.8% and 94.7% for Fenton and Fenton-like systems after 60min, respectively. FR-HP process seems to be an economically and environmentally friendly process to remove the metal from metal–EDTA wastewater. Hopefully, FR-HP process will promote the development of metal–EDTA treatment technology.
    Chemical Engineering Journal 12/2009; 155(3):769-774. DOI:10.1016/j.cej.2009.09.021 · 4.32 Impact Factor
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