Recent progress on heterogeneous Fe-based materials induced persulfate activation for organics removal

Li, Jun; Yang, Lei; Lai, Bo; Liu, Chao; He, Yuxin; Yao, Gang; Li, Naiwen

doi:10.1016/j.cej.2021.128674

Cited by 159 publications

(27 citation statements)

References 334 publications

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“…Water pollution, a global environmental issue, has received considerable attention over the years for its remediation. Various methods involving physical, chemical, and biological techniques have been used for wastewater treatment but due to certain shortcomings of these methods, such as expensive catalysts, difficult regeneration and recovery, large occupied area, and poor treatment efficiency, these methods have limited applications (Li et al 2021). Advanced oxidation process (AOP) is one such technology that is effective in degrading recalcitrant organic pollutants into inorganic compounds such as salts, CO 2 , and water through the generation of reactive oxygen species (ROS) (Andreozzi et al 1999;Thomas et al 2021).…”

Section: Heterogeneous Fenton Oxidation Based On H 2 O 2 Pms and Pdsmentioning

confidence: 99%

A comprehensive review on BPA degradation by heterogeneous Fenton-like processes

Nath

Biswas

Pal

2022

Water Science and Technology

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Synthetic organic pollutants emanating continuously in the ecosystem have become a global concern because of their toxicity and persistent nature. Bisphenol A (BPA) is one such pollutant which threatens public health and safety. It is a monomer used in manufacturing plastics, polycarbonate resins, epoxy resins and is a well-recognised endocrine disruptor miming estrogen. BPA leaches into food and beverages stored in containers causing contamination issues. Its widespread exposure and potential toxicity is an environmental health concern. In this review, a systematic investigation has been carried out on the heterogeneous catalysts used for Fenton-like processes for BPA degradation. The Fenton-like reaction is one such reaction that is used for wastewater remediation purposes. The reaction advances through the generation of powerful oxidizing radicals like OH. and SO4•– in the presence of a suitable catalyst. The application of various Fenton catalysts, with their distinguished morphological characteristics, oxidizing properties, toxicity analysis, and the present state of the art of BPA degradation by these catalysts, have been documented in the current work. This review also highlights a few challenges and prospects for analysing degradation products of landfill leachate.

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Section: Heterogeneous Fenton Oxidation Based On H 2 O 2 Pms and Pdsmentioning

confidence: 99%

A comprehensive review on BPA degradation by heterogeneous Fenton-like processes

Nath

Biswas

Pal

2022

Water Science and Technology

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“…First, magnetic MFe 2 O 4 (M = Co, Zn, Cu, etc.) nanomaterials with a formula of AB 2 O 4 have been widely applied in heterogeneous photocatalytic PS activation due to their stable structures, magnetic properties, and low metal leaching. , Generally, the M 3+ /M 2+ and Fe 3+ /Fe 2+ species of MFe 2 O 4 can exhibit a synergistic effect to produce ROSs, in which M is considered as the main active site. − Perovskite (ABO 3 ) is a general term for typical oxides, which have been considered as a kind of suitable photocatalytic PS activator. , In recent years, bismuth vanadate (BiVO 4 ), a visible light photocatalyst with a low band gap of 2.3–2.5 eV, has been widely employed in photocatalysis and PS activation to remove organic pollutants in wastewater treatment. , For instance, BiVO 4 nanosheets were used to activate PMS and PDS, respectively, to remove aqueous ciprofloxacin (CIP) under visible light irradiation, in which the visible light induced e – activated PS to generate SO 4 •– , HO • , and O 2 •– to degrade CIP, while h + also contributed to the degradation of CIP . In another study, a CuBi 2 O 4 /PMS/vis system was built to remove various aqueous PPCPs, in which the synchronous transformations of Cu 2+ /Cu + and Bi 3+ /Bi 5+ valence states and visible light irradiation synergistically promoted the production of HO • , SO 4 •– , 1 O 2 , and h + .…”

Section: Heterogeneous Photocatalytic Ps Activationmentioning

confidence: 99%

“…nanomaterials with a formula of AB 2 O 4 have been widely applied in heterogeneous photocatalytic PS activation due to their stable structures, magnetic properties, and low metal leaching. 196,197 Generally, the M 3+ /M 2+ and Fe 3+ /Fe 2+ species of MFe 2 O 4 can exhibit a synergistic effect to produce ROSs, in which M is considered as the main active site. 198−201 Perovskite (ABO 3 ) is a general term for typical oxides, which have been considered as a kind of suitable photocatalytic PS activator.…”

Section: ■ Introductionmentioning

confidence: 99%

Heterogeneous Photocatalytic Activation of Persulfate for the Removal of Organic Contaminants in Water: A Critical Review

Chen

et al. 2022

ACS EST Eng.

141

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Heterogeneous photocatalytic persulfate (PS) activation technologies are being intensively studied for water treatment due to their friendly environmental benefits and photosynergistic effect in comparison with traditional PS activation systems. Previous reviews have summarized diverse PS activation methods and the role of light in the photocatalytic PS activation systems, but it is still urgent to provide a comprehensive review on the deep understanding and rational design of heterogeneous photocatalytic PS-based advanced oxidation processes (AOPs). This review intends to thoroughly address the in-depth fundamentals and mechanisms for the heterogeneous photocatalytic PS-AOPs. Challenges and improvement strategies of the heterogeneous photocatalytic PS-AOPs are also critically discussed. On the basis of a detailed survey of the published studies, heterogeneous photocatalytic PS-AOPs, including Fe-based, TiO2-based, other metal based, bimetallic, and metal-free PS-AOPs, are carefully clarified. Finally, the engineering implications and prospects are enumerated for developing efficient and environmentally friendly heterogeneous photocatalytic PS-AOPs for water treatment. It is expected that this review will motivate researchers to construct novel and promising heterogeneous photocatalytic PS-AOPs for water treatment.

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“…The S 2 O 8 2− and HSO 5 − peroxides are of major importance in advanced oxidation technologies [ 33 , 34 , 35 , 36 ]. Therefore, the mechanisms of the reactions Fe(H 2 O) 6 2+ + HSO 5 − /S 2 O 8 2− were studied.…”

Section: Fenton-like Reactions Involving Fe II L ...mentioning

confidence: 99%

What Are the Oxidizing Intermediates in the Fenton and Fenton-like Reactions? A Perspective

Meyerstein

2022

Antioxidants

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The Fenton and Fenton-like reactions are of major importance due to their role as a source of oxidative stress in all living systems and due to their use in advanced oxidation technologies. For many years, there has been a debate whether the reaction of FeII(H2O)62+ with H2O2 yields OH• radicals or FeIV=Oaq. It is now known that this reaction proceeds via the formation of the intermediate complex (H2O)5FeII(O2H)+/(H2O)5FeII(O2H2)2+ that decomposes to form either OH• radicals or FeIV=Oaq, depending on the pH of the medium. The intermediate complex might also directly oxidize a substrate present in the medium. In the presence of FeIIIaq, the complex FeIII(OOH)aq is formed. This complex reacts via FeII(H2O)62+ + FeIII(OOH)aq → FeIV=Oaq + FeIIIaq. In the presence of ligands, the process often observed is Ln(H2O)5−nFeII(O2H) → L•+ + Ln−1FeIIIaq. Thus, in the presence of small concentrations of HCO3− i.e., in biological systems and in advanced oxidation processes—the oxidizing radical formed is CO3•−. It is evident that, in the presence of other transition metal complexes and/or other ligands, other radicals might be formed. In complexes of the type Ln(H2O)5−nMIII/II(O2H−), the peroxide might oxidize the ligand L without oxidizing the central cation M. OH• radicals are evidently not often formed in Fenton or Fenton-like reactions.

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Recent progress on heterogeneous Fe-based materials induced persulfate activation for organics removal

Cited by 159 publications

References 334 publications

A comprehensive review on BPA degradation by heterogeneous Fenton-like processes

A comprehensive review on BPA degradation by heterogeneous Fenton-like processes

Heterogeneous Photocatalytic Activation of Persulfate for the Removal of Organic Contaminants in Water: A Critical Review

What Are the Oxidizing Intermediates in the Fenton and Fenton-like Reactions? A Perspective

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