Highly efficient removing refractory organics continuously using a Fenton-like Filter: The role of in-situ galvanic effect enhanced peroxymonosulfate activation

Zeng, Qingyi; Jiang, Yichang; Ni, Jiahua; Tang, Jing; Wen, Yanjun; Fu, Xijun; Zhang, Qingsong; Xiong, Zhu; Cai, Tao

doi:10.1016/j.cej.2022.138067

Cited by 34 publications

(5 citation statements)

References 44 publications

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“…However, the BPA removals dramatically decreased to 58% and 41% with the addition of p -BQ and l -His over the Fe–N/P 1.6 –C SAC, as HO 2 ˙/O 2 ˙ − and 1 O 2 scavengers, respectively. 53–55 Thus, HO 2 ˙/O 2 ˙ − and 1 O 2 were the dominant ROS for BPA degradation in the Fe–N/P 1.6 –C/PMS system.…”

Section: Resultsmentioning

confidence: 93%

Reconstructing atomic Fe coordination in the PMS activation process to realize efficient BPA degradation at low temperature

Lin

Qin

et al. 2023

Environ. Sci.: Nano

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Section: Resultsmentioning

confidence: 93%

Reconstructing atomic Fe coordination in the PMS activation process to realize efficient BPA degradation at low temperature

Lin

Qin

et al. 2023

Environ. Sci.: Nano

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“…Remarkably, the 3D-MNSN-CF/PMS system exhibited excellent catalytic performance across a wide pH range from 2 to 11, demonstrating its adaptability to various wastewater environments in practical applications. 46,47 Furthermore, the influence of coexisting ions and NOM, including SO 4 2− , Cl − , H 2 PO 4 − , HCO 3 − , and humic acid (HA), was examined (Figure 4b−f). The addition of Cl − enhanced the degradation rate of TC, achieving a k value of 0.55 min −1 at a concentration of 100 mM Cl − .…”

Section: Ph and Coexistedmentioning

confidence: 99%

MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Zhang

et al. 2023

ACS Appl. Nano Mater.

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The development of highly efficient fixed catalysts is a significant concern in practical wastewater treatment using the peroxymonosulfate (PMS)-based Fenton-like process. In this study, we successfully synthesized a three-dimensional (3D) δ-MnO 2 nanosheet (MNSN) net grown on a carbon-fiber (CF) sheet (3D-MNSN-CF) through a simple hydrothermal strategy. This novel catalyst demonstrated exceptional efficiency and stability in activating PMS for degrading refractory organics. The 3D-MNSN-CF catalyst was composed of wrinkled, ultrathin δ-MnO 2 nanosheets (∼4.3 nm) grown on CF, forming a uniform 3D net structure with a covering thickness of approximately 7.6 μm (mass ratio ∼ 2.17%). This unique morphology provided a fixed Mn-based catalyst with a highly exposed (001) facet, intrinsic Mn 3+ /Mn 4+ redox pair, and a high ratio of oxygen vacancies (O V s). These features enabled the 3D-MNSN-CF/PMS system to exhibit a remarkable removal ratio of approximately 100% for tetracycline hydrochloride (TC) degradation. The system also showed a high rate constant (k value) of approximately 0.15 min −1 and a specific activity (ε) of 3.46 L min −1 g −1 based on the MnO 2 ratio, surpassing many reported Mn-based catalysts. Moreover, the 3D-MNSN-CF catalyst maintained excellent performance over a wide pH range from 2 to 11. Furthermore, we discovered that electron-rich oxygen-containing groups exhibited an inhibition effect by competing adsorption with PMS, hindering the generation of radicals. Additionally, the results indicated that singlet oxygen ( 1 O 2 ) was the main reactive species responsible for TC removal, while only a small amount of radicals contributed to the process. The catalyst's excellent performance was also demonstrated in treating various refractory organics and real wastewater, and it exhibited splendid stability for recycling use.

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“…Hence, inspired by the above ideas, a synergistic 3D EO‐PMS system was established to facilitate the activation of PMS and the removal of PNP. As a 3D electrode, Co 3 O 4 ‐supported CF composite (Co/CF) electrode showed controllable shape in the reaction solution, simplifying the recovery and regeneration of catalyst 27 . In the octahedral structure of Co 3 O 4 , Co 2+ and Co 3+ can be interconverted at the same location, which is a critical process that enables a sustained and efficient excitation of PMS 28 …”

Section: Introductionmentioning

confidence: 99%

“…As a 3D electrode, Co 3 O 4 -supported CF composite (Co/CF) electrode showed controllable shape in the reaction solution, simplifying the recovery and regeneration of catalyst. 27 In the octahedral structure of Co 3 O 4 , Co 2+ and Co 3+ can be interconverted at the same location, which is a critical process that enables a sustained and efficient excitation of PMS. 28 In this study, the Co/CF composites were synthesized by hydrothermal and calcination methods and characterized through X-ray diffraction (XRD).…”

Section: Introductionmentioning

confidence: 99%

Co₃O₄/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms

Zhao

Zhang

2022

J of Chemical Tech & Biotech

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BACKGROUND: Conventional electrochemical oxidation (EO) processes do not easily activate peroxymonosulfate (PMS) and are susceptible to the effects of electrode size, material and large-distance two-dimensional (2D) electrode structures, resulting in low mass transfer efficiency and low electrolytic productivity, limiting their ability to degrade pollutants. It is still a challenge to design and prepare a system and materials to enhance the activation of PMS and the EO process. RESULTS: Co 3 O 4 -loaded carbon felt three-dimensional (3D) electrode material (Co/CF) was prepared and used to construct a 3D electrocatalytic synergistic system (EO-Co/CF-PMS). The system combined the advantages of bipolar electrochemistry, threedimensional electrochemistry and advanced oxidation processes based on sulfate radical (SR-AOPs) to facilitate the activation of PMS for degradation of p-nitrophenol (PNP) in water. In addition, the synergistic system showed excellent pollutant degradation performance, achieving 89.51% PNP degradation in 10 min with an energy consumption of 0.4255 kWh m −3 . After being used for four consecutive cycle experiments, the synergistic system still achieved 83% PNP removal. Besides, the EO process also facilitated the Co cycle, resulting in a continuous and efficient degradation of the pollutants. The effects of experimental parameters (initial pH, PMS dose, and applied voltage) on PNP elimination were determined. The results of a reactive oxygen species scavenging experiment and electron spin resonance analysis showed that •OH, SO 4•− , and 1 O 2 all played a major role in the PNP elimination process.CONCLUSIONS: The research demonstrated that the composite catalyst Co/CF improved the property of the EO process for catalyzing PMS and thus enlarged the practical application of AOPs in pollutant degradation in aqueous solution.

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Highly efficient removing refractory organics continuously using a Fenton-like Filter: The role of in-situ galvanic effect enhanced peroxymonosulfate activation

Cited by 34 publications

References 44 publications

Reconstructing atomic Fe coordination in the PMS activation process to realize efficient BPA degradation at low temperature

Reconstructing atomic Fe coordination in the PMS activation process to realize efficient BPA degradation at low temperature

MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Co₃O₄/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms

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Highly efficient removing refractory organics continuously using a Fenton-like Filter: The role of in-situ galvanic effect enhanced peroxymonosulfate activation

Cited by 34 publications

References 44 publications

Reconstructing atomic Fe coordination in the PMS activation process to realize efficient BPA degradation at low temperature

Reconstructing atomic Fe coordination in the PMS activation process to realize efficient BPA degradation at low temperature

MnO2 Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Co3O4/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms

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MnO₂ Nanosheet Nets on Carbon Fiber as Fixed Catalysts for a Highly Efficient, Nonradical Fenton-like Process in Wastewater Refractory Pollutant Treatment

Co₃O₄/carbon felt three‐dimensional electrode promoted electrocatalytic oxidation – peroxymonosulfate system for p‐nitrophenol degradation: effect of radical and non‐radical mechanisms