Zero-valent iron/activated carbon microelectrolysis to activate peroxydisulfate for efficient degradation of chlortetracycline in aqueous solution

An, Lu; Xiao, Pengfei

doi:10.1039/d0ra03639k

Cited by 33 publications

(6 citation statements)

References 50 publications

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“…As displayed in Figure 7G, the removal percentages of BPA were maintained well in the pH range from 3 to 9 (> 73% within 15 min) and decreased rapidly when the pH value was 11. The sudden drop at pH = 11 was due to the generation of SO 5 2-, which prevented the generation of SO 4 •and • OH in the 0.6-FNGD/PMS/Vis system [42] . Thus, the prepared FNGD material can be applied well in weakly acidic or alkaline environments.…”

Section: Catalytic Efficiency Of Catalystsmentioning

confidence: 99%

Crystallization regulation of Fe0@Fe3O4 using a g-C3N4/diatomite composite for enhancing photocatalytic peroxymonosulfate activation

Wang¹,

Zhang²,

Zhou³

et al. 2022

Miner Miner Mater

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Photocatalysis and persulfate synergistic catalysis have recently become promising technologies for degrading refractory organic contaminants in effluents. In this work, Fe0@Fe3O4 is successfully immobilized on a N-deficient g-C3N4/diatomite composite (NGD) via a simple self-assembly process. The structural characteristics and peroxymonosulfate activation ability of the composite under visible-light irradiation are explored in detail. Notably, the introduction of NGD affects the crystallinity and morphology of Fe0@Fe3O4, forming homogenously distributed nanoparticles rather than irregular and agglomerated crystals with rod-like structures. The synthesized Fe0@Fe3O4/N-deficient g-C3N4/diatomite composite (FNGD) exhibits a superior removal percentage of bisphenol A (> 95% within 15 min). Furthermore, its degradation rate constant (k) is ~59 and ~27 times higher than those of NGD and bare Fe0@Fe3O4, respectively. Moreover, holes (hvb+), singlet oxygen (1O2) and superoxide free radicals (•O2-) play a major role in the FNGD/peroxymonosulfate/visible system based on radial quenching experiments and electron paramagnetic resonance spectra. Overall, this study provides novel insights into visible light-assisted peroxymonosulfate activation by the g-C3N4/mineral-based composite for wastewater treatment.

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Section: Catalytic Efficiency Of Catalystsmentioning

confidence: 99%

Crystallization regulation of Fe0@Fe3O4 using a g-C3N4/diatomite composite for enhancing photocatalytic peroxymonosulfate activation

Wang¹,

Zhang²,

Zhou³

et al. 2022

Miner Miner Mater

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“…The activation of PMS by AC mainly depends on its four active sites: surface functional groups, sp 2 hybrid carbon at defect edges, delocalized π electrons and oxygen-containing functional groups, including hydroxyl (À OH), carboxyl (À COOH) and ketone (C=O), etc. [38,[48][49][50] These active sites can be used as the active center of electron transfer medium to decompose PMS into active free radicals, which has good effect on the removal of organic matter. ACF is a new type of porous carbon with a large pore volume and a more concentrated pore size distribution, [51] which can be used for the oxidative decolorization of azo dyes.…”

Section: Activated Carbonmentioning

confidence: 99%

Applications of Carbon‐Based Materials in Activated Peroxymonosulfate for the Degradation of Organic Pollutants: A Review

Hao,

Zhang,

Liu

et al. 2023

The Chemical Record

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In recent years, water pollution has posed a serious threat to aquatic organisms and humans. Advanced oxidation processes (AOPs) based on activated peroxymonosulfate (PMS) show high oxidation, good selectivity, wide pH range and no secondary pollution in the removal of organic pollutants in water. Carbon‐based materials are emerging green catalysts that can effectively activate persulfates to generate radical and non‐radical active species to degrade organic pollutants. Compared with transition metal catalysts, carbon‐based materials are widely used in SR‐AOPs because of their low cost, non‐toxicity, acid and alkali resistance, large specific surface area, and scalable surface charge, which can be used for selective control of specific water pollutants. This paper mainly presents several carbon‐based materials used to activate PMS, including raw carbon materials and modified carbon materials (heteroatom‐doped and metal‐doped), analyzes and summarizes the mechanism of activating PMS by carbon‐based catalysts, and discusses the influencing factors (temperature, pH, PMS concentration, catalyst concentration, inorganic anions, inorganic cations and dissolved oxygen) in the activation process. Finally, the future challenges and prospects of carbon‐based materials in water pollution control are also presented.

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“…Another reason is that NO 3 À is a scavenger of SO 4 À• (Equation ( 24)) (Wang et al 2013). An & Xiao (2020) investigated the inhibition of CTC removal by three typical inorganic anions (HCO 3 À , H 2 PO 4 À , and Cl À ), as shown in Figure 10. The CTC removal rate was reduced by 14.2% in 60 min by the inhibition of H 2 PO 4 À .…”

Section: Effects Of Common Anionsmentioning

confidence: 99%

Activated persulfate by iron-carbon micro electrolysis used for refractory organics degradation in wastewater: a review

Chen

Gao

Liu

et al. 2022

Water Science and Technology

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With the rapid economic development, the discharge of industrial wastewater and municipal wastewater containing many refractory organic pollutants is increasing, so there is an urgent need for processes that can treat refractory organics in wastewater. Iron-carbon micro electrolysis and advanced oxidation based on persulfate radicals (SO4−·) have received much attention in the field of organic wastewater treatment. Iron-carbon micro electrolysis activated persulfate (Fe-C/PS) treatment of wastewater is characterized by high oxidation efficiency and no secondary pollution. This paper reviews the mechanism and process of Fe-C/PS, degradation of organics in different wastewater, and the influencing factors. In addition, the degradation efficiency and optimal reaction conditions (oxidant concentration, catalyst concentration, iron-carbon material, and pH) of Fe-C/PS in the treatment of refractory organics in wastewater are summarized. Moreover, the important factors affecting the degradation of organics by Fe-C/PS are presented. Finally, we analyzed the challenges and the prospects for the future of Fe-C/PS in application, and concluded that the main future directions are to improve the degradation efficiency and cost by synthesizing stable and efficient catalysts, optimizing process parameters, and expanding the application scope.

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Zero-valent iron/activated carbon microelectrolysis to activate peroxydisulfate for efficient degradation of chlortetracycline in aqueous solution

Abstract: The microelectrolysis system composed of zero-valent iron and activated carbon can effectively activate persulfate to produce SO4−˙ and O2−˙, which have excellent capacity for degradation of chlortetracycline hydrochloride.

Cited by 33 publications

References 50 publications

Crystallization regulation of Fe0@Fe3O4 using a g-C3N4/diatomite composite for enhancing photocatalytic peroxymonosulfate activation

Crystallization regulation of Fe0@Fe3O4 using a g-C3N4/diatomite composite for enhancing photocatalytic peroxymonosulfate activation

Applications of Carbon‐Based Materials in Activated Peroxymonosulfate for the Degradation of Organic Pollutants: A Review

Activated persulfate by iron-carbon micro electrolysis used for refractory organics degradation in wastewater: a review

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