A novel combination of bioelectrochemical system with peroxymonosulfate oxidation for enhanced azo dye degradation and MnFe2O4 catalyst regeneration

Xiao, Leilei; Quan, Xiangchun; Liang, Chen

doi:10.1016/j.chemosphere.2018.11.077

Cited by 50 publications

(7 citation statements)

References 41 publications

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“…However, when the composite amount further increased to 0.8 g/L, the removal percentage declined from 95.4 ± 3.0% to 84.6 ± 2.1%, which may be explained by the excess catalyst causing ineffective PMS consumption (Guan et al, 2013). This finding was consistent with our previous study, in which the amount of MnFe 2 O 4 affected the generation efficiency of SO 4 À in the MnFe 2 O 4 /PMS system and a further rise in the amount of MnFe 2 O 4 adversely influenced SO 4 À generation (Xu et al, 2019). These results indicated that the optimal Co 3 O 4 loading amount on BC and the optimal Co 3 O 4 -BC composite amount were 10 wt% and 0.2 g/L, respectively.…”

Section: Influential Factors On the Catalytic Activity Of Co 3 O 4 -Bcsupporting

confidence: 92%

Heterogeneous activation of peroxymonosulfate by a biochar-supported Co3O4 composite for efficient degradation of chloramphenicols

Xiao

Zhang

et al. 2020

Environmental Pollution

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101

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Herein, a new peroxymonosulfate (PMS) activation system was established using a biochar (BC)-supported Co 3 O 4 composite (Co 3 O 4 -BC) as a catalyst to enhance chloramphenicols degradation. The effects of the amount of Co 3 O 4 load on the BC, Co 3 O 4 -BC amount, PMS dose and solution pH on the degradation of chloramphenicol (CAP) were investigated. The results showed that the BC support could well disperse Co 3 O 4 particles. The degradation of CAP (30 mg/L) was enhanced in the Co 3 O 4 -BC/PMS system with the apparent degradation rate constant increased to 5.1, 19.4 and 7.2 times of that in the Co 3 O 4 /PMS, BC/PMS and PMS-alone control systems, respectively. Nearly complete removal of CAP was achieved in the Co 3 O 4 -BC/PMS system under the optimum conditions of 10 wt% Co 3 O 4 loading on BC, 0.2 g/L Co 3 O 4 -BC, 10 mM PMS and pH 7 within 10 min. The Co 3 O 4 /BC composites had a synergistic effect on the catalytic activity possibly because the conducting BC promoted electron transfer between the Co species and HSO 5À and thus accelerated the Co 3þ /Co 2þ redox cycle. Additionally, over 85.0 ± 1.5% of CAP was still removed in the 10th run. Although both SO 4 À and OH were identified as the main active species, SO 4 À played a dominant role in CAP degradation. In addition, two other chloramphenicols, i.e., florfenicol (FF) and thiamphenicol (TAP), were also effectively degraded with percentages of 86.4 ± 1.3% and 71.8 ± 1.0%, respectively. This study provides a promising catalyst Co 3 O 4 -BC to activate PMS for efficient and persistent antibiotics degradation.

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Section: Influential Factors On the Catalytic Activity Of Co 3 O 4 -Bcsupporting

confidence: 92%

Heterogeneous activation of peroxymonosulfate by a biochar-supported Co3O4 composite for efficient degradation of chloramphenicols

Xiao

Zhang

et al. 2020

Environmental Pollution

Self Cite

101

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“…Meanwhile, the lattice absorption of Fe-O detected in the recovered MnFe 2 O 4 /BGA composite was blue-shifted, indicative of the change in its chemical environment after reusing 4 times. Such blue shift might be due to the effect of Verway hopping (Mn 2+ + Fe 3+ →Mn 3+ + Fe 2+ ) [ 41 ], which leads to the increase in electron cloud density around iron ions. Thus, both the emerged weak bands and the strengthening in the lattice absorption of Fe-O were not results of the change in material structure of the MnFe 2 O 4 /BGA composite.…”

Section: Resultsmentioning

confidence: 99%

Section: Stability and Reusability Of The Mnfe2o4/bga Compositementioning

confidence: 99%

The Efficient Photocatalytic Degradation of Organic Pollutants on the MnFe2O4/BGA Composite under Visible Light

Jiang

Lian

2021

Nanomaterials

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The MnFe2O4/BGA (boron-doped graphene aerogel) composite was prepared by hydrothermal treatment of MnFe2O4 particles, boric acid, and graphene oxide. When applied as a photo-Fenton catalyst for the degradation of rhodamine B, the MnFe2O4/BGA composite yielded a degradation efficiency much higher than the sum of those of individual MnFe2O4 and BGA under identical experimental conditions, indicating a strong synergetic effect established between MnFe2O4 and BGA. The catalytic degradation of rhodamine B was proved to follow pseudo first-order kinetics, and the apparent reaction rate constant on the MnFe2O4/BGA composite was calculated to be three- and seven-fold that on BGA and MnFe2O4, respectively. Moreover, the MnFe2O4/BGA composite also demonstrated good reusability and could be reused for four cycles without obvious loss of photocatalytic activity.

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“…The nanoparticles used to improve the anode serve as a bridge for electron transfer between the bacteria and the anode. Due to the availability of active sites for bacterial growth on the anode, this leads to an increase in the rates of electricity generation [ 67 ].…”

Section: The Anodementioning

confidence: 99%

Applications of Nanomaterials in Microbial Fuel Cells: A Review

et al. 2022

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Microbial fuel cells (MFCs) are an environmentally friendly technology and a source of renewable energy. It is used to generate electrical energy from organic waste using bacteria, which is an effective technology in wastewater treatment. The anode and the cathode electrodes and proton exchange membranes (PEM) are important components affecting the performance and operation of MFC. Conventional materials used in the manufacture of electrodes and membranes are insufficient to improve the efficiency of MFC. The use of nanomaterials in the manufacture of the anode had a prominent effect in improving the performance in terms of increasing the surface area, increasing the transfer of electrons from the anode to the cathode, biocompatibility, and biofilm formation and improving the oxidation reactions of organic waste using bacteria. The use of nanomaterials in the manufacture of the cathode also showed the improvement of cathode reactions or oxygen reduction reactions (ORR). The PEM has a prominent role in separating the anode and the cathode in the MFC, transferring protons from the anode chamber to the cathode chamber while preventing the transfer of oxygen. Nanomaterials have been used in the manufacture of membrane components, which led to improving the chemical and physical properties of the membranes and increasing the transfer rates of protons, thus improving the performance and efficiency of MFC in generating electrical energy and improving wastewater treatment.

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A novel combination of bioelectrochemical system with peroxymonosulfate oxidation for enhanced azo dye degradation and MnFe2O4 catalyst regeneration

Cited by 50 publications

References 41 publications

Heterogeneous activation of peroxymonosulfate by a biochar-supported Co3O4 composite for efficient degradation of chloramphenicols

Heterogeneous activation of peroxymonosulfate by a biochar-supported Co3O4 composite for efficient degradation of chloramphenicols

The Efficient Photocatalytic Degradation of Organic Pollutants on the MnFe2O4/BGA Composite under Visible Light

Applications of Nanomaterials in Microbial Fuel Cells: A Review

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