A novel photochemical system of ferrous sulfite complex: Kinetics and mechanisms of rapid decolorization of Acid Orange 7 in aqueous solutions

Zhou, Danna; Chen, Long; Zhang, Changbo; Yu, Yingtan; Zhang, Li; Wu, Feng

doi:10.1016/j.watres.2014.03.016

Cited by 114 publications

(36 citation statements)

References 37 publications

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“…It indicated the important role of visible light in the heterogeneous Fenton process for the degradation of RhB. The quantum yield ( ) was estimated to examine the photodegradation efficiency [39,64], which was found to be (1.66 ± 0.21) × 10 −2 (see Supplementary Material for detail). In order to explore the contribution of photolysis to the removal of RhB, the dye was irradiated by visible light alone, with the adsorption equilibrium concentration of RhB being selected as the initial dye concentration.…”

Section: Visible Light Photo-fenton Catalytic Activity Of Fe-bmentioning

confidence: 99%

Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Gao

Wang

Zhang

2015

Applied Catalysis B: Environmental

168

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Section: Visible Light Photo-fenton Catalytic Activity Of Fe-bmentioning

confidence: 99%

Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Gao

Wang

Zhang

2015

Applied Catalysis B: Environmental

168

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“…H 2 O 2 and HO • are produced through photolysis of Fe(III)‐PCOA complexes in the presence of dissolved oxygen. Similarly, sulfite complexes with Fe(II) and Fe(III) form a photo‐Fe(II/III)/sulfite system and produce SO 4 •− without added PS/PMS . Sulfite can replace PS/PMS in SR‐Fenton systems since sulfite is usually cheaper and more environmentally friendly than PS/PMS.…”

Section: Analogy Of Fenton (Like) Systems and Sr‐fenton Systemsmentioning

confidence: 99%

Sulfur‐replaced Fenton systems: can sulfate radical substitute hydroxyl radical for advanced oxidation technologies?

Zhou

Zhang

Chen

2014

J of Chemical Tech & Biotech

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Sulfate radicals (SO4•−) and hydroxy radicals (HO•) are the major radicals used in advanced oxidation technologies (AOTs) for the removal of contaminants. Although SO4•− reacts with organic or inorganic compounds with rate constants comparatively lower than that of HO•, AOTs based on SO4•− (abbreviated as SR‐AOTs) have gained lots of attention due to the selective oxidation and non‐pH‐dependence. A series of systems using persulfate (PS) or peroxymonosulfate (PMS) instead of H2O2 is designated as a sulfate radical‐Fenton system or sulfur‐replaced Fenton system (SR‐Fenton). Comparisons and analogies between Fenton (Fenton‐like) systems and SR‐Fenton systems are made and some new SR‐AOTs systems without PS or PMS are introduced. The possibility for the substitution of HO• by SO4•− for AOTs is discussed. Most likely in the future, efforts will be concentrated on product‐oriented AOTs with the purpose of recovery of chemical products rather than mineralization of organic contaminants, producing greenhouse gas CO2. Moreover, such SR‐Fenton system may be more atomically economical. © 2014 Society of Chemical Industry

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“…Among them it can be mentioned the synergistic effect of an electrochemical process coupled with peroxydisulfate, activated with ferrous ions as source of radicals (SO 4 -), to oxidize 0.1 mM AO7 in 60 minutes [9]. In other study, the kinetics of AO7 discoloration by means of SO 4 -radicals were as well investigated [10]. In the same way, a powerful reduction agent, zero-valent aluminum (2g L -1…”

Section: Introductionmentioning

confidence: 99%

Prediction of the Indirect Advanced Oxidation of Acid Orange 7 using a 3D RVC Cathode for H2O2 Production in a Divided Electrochemical Reactor

Díaz-Flores¹,

Morelos²

2018

Int. J. Green Technol.

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A three dimensional reticulate vitreous carbon piece is used to design an electrode for the cathodic O2 reduction reaction in a divided (by a Nafion 117 membrane) parallel plate reactor. The anode is a commercial stainless steel mesh. This approach allows producing H2O2 at low energy (6.85 kWKg -1 H2O2) in a low ionic acidic medium (0.05M Na2SO4, pH 2). Under these conditions the H2O2 can be activated, in the presence of 1 mM Fe 2+ , as soon as it is produced to develop the Fenton Reagent. It is found that Acid Orange 7 indirect oxidation (in the concentration range of 0.07 to 0.19 mM) by Fenton process follows a first order kinetic equation. From each experimental AO7 oxidation the main parameters (a,mM and k,min 1 ) of the first order kinetic equation are obtained. These parameters can be correlated with AO7 concentration in the concentration range studied. A semi-empirical chemical model to predict AO7 degradation, in the electrochemical reactor, can be developed taking into account the main equations derived from experimental data. The prediction of the main parameters (H2O2 electro-produced, oxidation rate, energy required, electrolysis time) shows good agreement with the experimental data. Therefore, it was found that 1.83 kWhm -3 are needed to oxidize 0.191 mM AO7 in 3h. The chemical model can be used to predict both time and the energy required to treat a textile effluent with a variable pollutant organic load.

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A novel photochemical system of ferrous sulfite complex: Kinetics and mechanisms of rapid decolorization of Acid Orange 7 in aqueous solutions

Cited by 114 publications

References 37 publications

Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Removal of Rhodamine B with Fe-supported bentonite as heterogeneous photo-Fenton catalyst under visible irradiation

Sulfur‐replaced Fenton systems: can sulfate radical substitute hydroxyl radical for advanced oxidation technologies?

Prediction of the Indirect Advanced Oxidation of Acid Orange 7 using a 3D RVC Cathode for H2O2 Production in a Divided Electrochemical Reactor

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