Activated biochar supported iron-copper oxide bimetallic catalyst for degradation of ciprofloxacin via photo-assisted electro-Fenton process: A mild pH condition

Mansoori, Sepideh; Davarnejad, Reza; Ozumchelouei, Elnaz Jafari; Ismail, A.F.

doi:10.1016/j.jwpe.2020.101888

Cited by 43 publications

(6 citation statements)

References 64 publications

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“…For instance, when the current is 0.1 A, the degradation rates of CIP after 60 min corresponding to different aeration modes (6 mm plastic pipe aeration, 3 μm membrane aeration, and 800 nm membrane aeration) are 73.43%, 94.24%, and 96.06%, respectively. The apparent rate constants (k) calculated according to the apparent pseudofirst-order kinetics are 0.02, 0.091, and 0.096 min −1 , respectively, 37,38 further confirming the enhancement of the membrane aeration mode. The same trend was also found for the other four currents.…”

Section: ■ Introductionmentioning

confidence: 65%

Enhanced Electro-Fenton Degradation of Ciprofloxacin by Membrane Aeration

Zhi

Han

Zheng

et al. 2022

Ind. Eng. Chem. Res.

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Electro-Fenton is a widely used electrochemical advanced oxidation process for the treatment of refractory organic pollutants, in which O 2 input is required to generate hydrogen peroxide. The aeration mode directly affects the dissolution and stability of O 2 bubbles in the solution, thus the rate of degradation. Herein, membrane aeration was introduced to the electro-Fenton degradation of ciprofloxacin in which O 2 was dispersed into the liquid phase in the form of microbubbles through the ceramic membrane. Microbubbles can greatly improve the gas−liquid mass transfer efficiency of unit volume O 2 to obtain an ultrahigh concentration of dissolved O 2 up to 46 mg/L, thus improving the reaction rate. The effects of aeration mode, applied current, membrane aperture, aeration rate, and ciprofloxacin concentration on degradation rate were studied. Compared with the conventional electro-Fenton process using plastic pipe aeration, the membrane aeration-enhanced electro-Fenton (MAEF) system achieved a significant improvement in the degradation rate, and the reaction time required to achieve a 97% degradation ratio was remarkably reduced from 4 h to 10 min. Membrane aeration is an efficient approach to facilitating heterogeneous catalysis reactions involving the gas phase.

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Section: ■ Introductionmentioning

confidence: 65%

Enhanced Electro-Fenton Degradation of Ciprofloxacin by Membrane Aeration

Zhi

Han

Zheng

et al. 2022

Ind. Eng. Chem. Res.

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“…The IR transmittance peaks at 1720, 1590, 1390, 1240, and 1080 cm –1 correlated to the −CO stretching of carbonyl, CC stretching, C–O stretching of carboxyl, C–O stretching of epoxy, and C–O stretching of alkoxy. , Some GO IR transmittance peaks, revealing O–H stretching, C–H stretching, CC stretching, and C–O stretching, were observed on the composites spectra. The O–H stretching signal at 3421 shifted to 3428 cm –1 , suggesting interactions between copper and iron mixed metal oxides and −OH groups . The IR spectrum of 0.25:0.25:1.00 CIMMO/rGO appeared to be identical to the GO spectrum but with reduced peak intensity.…”

Section: Resultsmentioning

confidence: 94%

Ciprofloxacin Electrochemical Sensor Using Copper–Iron Mixed Metal Oxides Nanoparticles/Reduced Graphene Oxide Composite

Chuiprasert,

Srinives,

Boontanon

et al. 2024

ACS Omega

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The harmful effects of antibiotic proliferation on the environment and its persistent nature are urgent global problems. Ciprofloxacin (CIP) is a fluoroquinolone-class antibiotic agent used widely to treat pathogen-related diseases in humans and animals. Its excretion into surface water causes antibiotic resistance in microbes, resulting in difficult-to-treat or untreatable infectious diseases. This study developed a simple and efficient electrochemical sensor to detect CIP. Hydrothermal chemistry was utilized to synthesize an electrophotocatalytic composite of copper–iron mixed metal oxides (CIMMO) on reduced graphene oxide (rGO) (CIMMO/rGO). The composite was employed in an electrochemical sensor and exhibited outstanding performance in detecting CIP. The sensor was operated in differential pulse voltammetry (DPV) mode under light source illumination. The sensor yielded a linear response in the concentration range of 0.75 × 10–9–1.0 × 10–7 mol L–1 CIP and showed a limit of detection (LOD) of 4.74 × 10–10 mol L–1. The excellent sensing performance of the composite is attributable to the synergic effects between CIMMO nanoparticles and rGO, which facilitate photoinduced electron–hole separation and assist in the indirect electrochemical reactions/interactions with CIP.

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“…The results demonstrated effective removal of MB within the pH range of 5.0 to 11.0 (Figure 2k). Typically, •OH radicals exhibit high oxidative capacity in acidic conditions [40] . However, excessively acidic environments can result in the ionization of catalyst particles from the catalyst surface.…”

Section: Resultsmentioning

confidence: 99%

“…Typically, * OH radicals exhibit high oxidative capacity in acidic conditions. [40] However, excessively acidic environments can result in the ionization of catalyst particles from the catalyst surface. This situation is undesirable as it can hinder catalyst reusability and increase the risk of ion pollution.…”

Section: Photo-catalytic Activitymentioning

confidence: 99%

Green synthesis of ZnFe₂O₄@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light

Zheng,

Fan,

Cui

et al. 2024

ChemistrySelect

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In this study, an economical ZnFe2O4@BC composite was successfully synthesized using pomelo peel biochar through a simple one‐pot thermal‐calcination roasting method. The combination of biochar and ZnFe2O4 was confirmed by FTIR, XRD, Raman, TEM, and XPS analysis, confirming that the successful insertion of carbon into the oxygen sites of the ZnFe2O4 lattice, forming C−O bonds. The incorporation of biochar resulted in a high specific surface area, providing more active sites for catalytic reactions, enhancing electron transport, effectively separating electron‐hole pairs, increasing light capturing capacity, and restraining the leaching of metals. The Zn vacancy acted as an electron acceptor, promoting electron transfer in the catalyst by reducing the lowest unoccupied orbital position. Additionally, various reaction parameters such as solution pH, iron content, catalyst dosage, and H2O2 volume were investigated to elucidate their effects on the degradation performance. This study proposes a novel method for synthesizing carbon‐coated metal oxide semiconductors, which shows great potential for environmental and energy‐related applications.

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Activated biochar supported iron-copper oxide bimetallic catalyst for degradation of ciprofloxacin via photo-assisted electro-Fenton process: A mild pH condition

Cited by 43 publications

References 64 publications

Enhanced Electro-Fenton Degradation of Ciprofloxacin by Membrane Aeration

Enhanced Electro-Fenton Degradation of Ciprofloxacin by Membrane Aeration

Ciprofloxacin Electrochemical Sensor Using Copper–Iron Mixed Metal Oxides Nanoparticles/Reduced Graphene Oxide Composite

Green synthesis of ZnFe₂O₄@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light

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Activated biochar supported iron-copper oxide bimetallic catalyst for degradation of ciprofloxacin via photo-assisted electro-Fenton process: A mild pH condition

Cited by 43 publications

References 64 publications

Enhanced Electro-Fenton Degradation of Ciprofloxacin by Membrane Aeration

Enhanced Electro-Fenton Degradation of Ciprofloxacin by Membrane Aeration

Ciprofloxacin Electrochemical Sensor Using Copper–Iron Mixed Metal Oxides Nanoparticles/Reduced Graphene Oxide Composite

Green synthesis of ZnFe2O4@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light

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Product

Resources

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Green synthesis of ZnFe₂O₄@BC nanocrystals using pomelo peel waste for photo‐Fenton degradation of dye under visible light