Effect of inorganic anions on the performance of advanced oxidation processes for degradation of organic contaminants

Wang, Jianlong; Wang, Jianlong

doi:10.1016/j.cej.2020.128392

Cited by 533 publications

(97 citation statements)

References 108 publications

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“…To mitigate this situation, many efficient methods have been developed to deal with the above problems, such as adsorption, 3,4 flocculation 5 and advanced oxidation processes (AOPs). 6,7 Among AOPs, photocatalysis has attracted extensive attention due to its economic, efficient and green features. [8][9][10] For the past few decades, a variety of metal oxides (e.g., TiO 2 , 2,11 ZnO, 12 and WO 3 13 ) with strong redox ability have been explored as photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Construction of a hierarchical ZnIn₂S₄/C₃N₄ heterojunction for the enhanced photocatalytic degradation of tetracycline

Min

Wei

et al. 2022

Dalton Trans.

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Section: Introductionmentioning

confidence: 99%

Construction of a hierarchical ZnIn₂S₄/C₃N₄ heterojunction for the enhanced photocatalytic degradation of tetracycline

Min

Wei

et al. 2022

Dalton Trans.

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“…Thus,

, compared with

, has higher reactivity in

consumption. In addition and in a similar way,

was also reported as the sink of

radicals (Equation (35)) [ 128 ].

…”

Section: Influence Factors For Mn(iii) (Oxyhydr)oxides Reactivitymentioning

confidence: 84%

A Review of Manganese(III) (Oxyhydr)Oxides Use in Advanced Oxidation Processes

et al. 2021

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The key role of trivalent manganese (Mn(III)) species in promoting sulfate radical-based advanced oxidation processes (SR-AOPs) has recently attracted increasing attention. This review provides a comprehensive summary of Mn(III) (oxyhydr)oxide-based catalysts used to activate peroxymonosulfate (PMS) and peroxydisulfate (PDS) in water. The crystal structures of different Mn(III) (oxyhydr)oxides (such as α-Mn2O3, γ-MnOOH, and Mn3O4) are first introduced. Then the impact of the catalyst structure and composition on the activation mechanisms are discussed, as well as the effects of solution pH and inorganic ions. In the Mn(III) (oxyhydr)oxide activated SR-AOPs systems, the activation mechanisms of PMS and PDS are different. For example, both radical (such as sulfate and hydroxyl radical) and non-radical (singlet oxygen) were generated by Mn(III) (oxyhydr)oxide activated PMS. In comparison, the activation of PDS by α-Mn2O3 and γ-MnOOH preferred to form the singlet oxygen and catalyst surface activated complex to remove the organic pollutants. Finally, research gaps are discussed to suggest future directions in context of applying radical-based advanced oxidation in wastewater treatment processes.

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“…20, although minor contributions due to ionic strength effects and reactions of those ions with the hydroxyl radical formed in Eq. 24 cannot be discarded (the reactions of both phosphate [58] and chloride [59] ions with that radical are well documented).…”

Section: Rate Law Parametermentioning

confidence: 99%

Oxidation of hexacyanoferrate(II) ion by hydrogen peroxide: evidence of free radical intermediacy

Perez‐Benito

Pages-Rebull

2021

Reac Kinet Mech Cat

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The redox reaction between hexacyanoferrate(II) ion as the reducing agent and hydrogen peroxide as the oxidizing one, in slightly acid (pH 4.36-6.65) aqueous solutions containing phosphate ions, has been studied by means of an UV-Vis spectrophotometer monitoring the formation of Fe(III) at 420 nm. The initial hydrolysis of the Fe(II)-cyanide complex reactant to yield a pentacyanoaquaferrate(II) intermediate, as well as a decrease in the solution pH (acid catalysis), had both a positive effect on the reaction rate, whereas an increase in the concentrations of Fe(III), phosphate and chloride ions, and d-mannitol had a negative effect (inhibition). A computer program, specifically designed for this purpose, allowed arriving at a complex eight-coefficient experimental rate law by application of the initial rate method, accounting for the dependences of the reaction rate on the concentrations of Fe(II), H 2 O 2 and Fe(III). The reaction was characterized by a low value of the apparent activation energy (28.9 ± 2.7 kJ mol −1 ). Finally, a multi-step reaction mechanism, involving the participation of a penta-coordinated Fe(II) complex, and hydroxyl, superoxide and other free radicals as intermediates, has been proposed. This mechanism was supported by the available experimental information and confirmed by numerical simulations performed via the fourth order Runge-Kutta integration method.

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Effect of inorganic anions on the performance of advanced oxidation processes for degradation of organic contaminants

Cited by 533 publications

References 108 publications

Construction of a hierarchical ZnIn₂S₄/C₃N₄ heterojunction for the enhanced photocatalytic degradation of tetracycline

Construction of a hierarchical ZnIn₂S₄/C₃N₄ heterojunction for the enhanced photocatalytic degradation of tetracycline

A Review of Manganese(III) (Oxyhydr)Oxides Use in Advanced Oxidation Processes

Oxidation of hexacyanoferrate(II) ion by hydrogen peroxide: evidence of free radical intermediacy

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Effect of inorganic anions on the performance of advanced oxidation processes for degradation of organic contaminants

Cited by 533 publications

References 108 publications

Construction of a hierarchical ZnIn2S4/C3N4 heterojunction for the enhanced photocatalytic degradation of tetracycline

Construction of a hierarchical ZnIn2S4/C3N4 heterojunction for the enhanced photocatalytic degradation of tetracycline

A Review of Manganese(III) (Oxyhydr)Oxides Use in Advanced Oxidation Processes

Oxidation of hexacyanoferrate(II) ion by hydrogen peroxide: evidence of free radical intermediacy

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Construction of a hierarchical ZnIn₂S₄/C₃N₄ heterojunction for the enhanced photocatalytic degradation of tetracycline

Construction of a hierarchical ZnIn₂S₄/C₃N₄ heterojunction for the enhanced photocatalytic degradation of tetracycline