Effect of initial pH on the tetracycline (TC) removal by zero-valent iron: Adsorption, oxidation and reduction

Cao, Jinyan; Xiong, Zhaokun; Lai, Bo

doi:10.1016/j.cej.2018.03.036

Cited by 265 publications

(66 citation statements)

References 66 publications

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“…At low ζ, attraction exceeds repulsion and dispersion will break and flocculate [217]. Similar result was found by Cao et al at pH of 10, low ζ value (-3.4) was obtained, but with the decreasing pH (pH from 3 to 9, the ζ values were 33.7mV, 25.5 mV, 18.9 mV, 4.52 mV, respectively), significant ζ value found [258]. According to Hogland et al highest proportion of micropores have low ζ and PZC.…”

Section: Zeta Potential Measurement-isoelectric Point (Pzc-point Of Zsupporting

confidence: 84%

A Review Paper on Heterogeneous Fenton Catalyst: Types of Preparation, Modification Techniques, Factors Affecting the Synthesis, Characterization, and Application in the Wastewater Treatment

Kumar

Mohapatra

Dharmadhikari

et al. 2019

Bull. Chem. React. Eng. Catal.

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This comprehensive review focuses on the different factors, modification in the synthesis method, characterization and application of heterogeneous catalyst in the wastewater treatment based on the Fenton process. The present review highlights the different catalyst preparation methods like wet impregnation method, hydrothermal method, sol-gel method, precipitation method and their application to treat different recalcitrant organic chemicals. Major heterogeneous catalyst synthesis methods were discussed with their excellent workability. The importance of modification through physical and chemical method was also reported. Different catalyst, pollutants and optimum parametric conditions available in the literature along with some relevant studies are summarized. The effect of factors like pH, calcination and some other modifiers on the synthesis and their efficiency in the wastewater treatment has been described. The important characterization of synthesized catalysts explaining their working efficiency has also been discussed. In the final section, the application of heterogeneous catalyst synthesized by different methods in the wastewater/effluent treatment has been investigated. The main aim of this review is to find out the influence of process parameters and catalytic method on degradation/decolorization of organic compounds present in industrial or synthetic wastewater. Copyright © 2020 BCREC Group. All rights reserved

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Section: Zeta Potential Measurement-isoelectric Point (Pzc-point Of Zsupporting

confidence: 84%

A Review Paper on Heterogeneous Fenton Catalyst: Types of Preparation, Modification Techniques, Factors Affecting the Synthesis, Characterization, and Application in the Wastewater Treatment

Kumar

Mohapatra

Dharmadhikari

et al. 2019

Bull. Chem. React. Eng. Catal.

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show abstract

“…Whereas, the poor absorption and low metabolic rate of TC by humans and animals lead to a discharge of a large amount of TC in the original form or metabolites into the environment [3,4]. Hence, extraction or degradation of TC is a critical issue for water control, environmental protection, and methods such as adsorption, biological treatment, photocatalysis, and more have been proposed [5][6][7][8]. Biodegradation is quite promising because organic matters can be converted into inorganic molecules by certain bacteria, but the process is time consuming [9].…”

Section: Introductionmentioning

confidence: 99%

Ag as Cocatalyst and Electron-Hole Medium in CeO2 QDs/Ag/Ag2Se Z-scheme Heterojunction Enhanced the Photo-Electrocatalytic Properties of the Photoelectrode

Feng

Wei

et al. 2020

Nanomaterials

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A recyclable photoelectrode with high degradation capability for organic pollutants is crucial for environmental protection and, in this work, a novel CeO2 quantum dot (QDs)/Ag2Se Z-scheme photoelectrode boasting increased visible light absorption and fast separation and transfer of photo-induced carriers is prepared and demonstrated. A higher voltage increases the photocurrent and 95.8% of tetracycline (TC) is degraded by 10% CeO2 QDs/Ag2Se in 75 minutes. The degradation rate is superior to that achieved by photocatalysis (92.3% of TC in 90 min) or electrocatalysis (27.7% of TC in 90 min). Oxygen vacancies on the CeO2 QDs advance the separation and transfer of photogenerated carriers at the interfacial region. Free radical capture tests demonstrate that •O2−, •OH, and h+ are the principal active substances and, by also considering the bandgaps of CeO2 QDs and Ag2Se, the photocatalytic mechanism of CeO2 QDs/Ag2Se abides by the Z-scheme rather than the traditional heterojunction scheme. A small amount of metallic Ag formed in the photocatalysis process can form a high-speed charge transfer nano channel, which can greatly inhibit the photogenerated carrier recombination, improve the photocatalytic performance, and help form a steady Z-scheme photocatalysis system. This study would lay a foundation for the design of a Z-scheme solar photocatalytic system.

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“…But recently new techniques have been evaluated for this propose, such as adsorption, membrane filtration, photocatalysis, ozonization and electroxidation [9][10][11] . However, these processes generally generate toxic secondary compounds and have low removal efficiency in short time periods and are costly 4,12 .…”

Section: Introductionmentioning

confidence: 99%

Obtaining of Fe3O4@C Core-Shell Nanoparticles as an Adsorbent of Tetracycline in Aqueous Solutions

et al. 2019

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Tetracycline is used to treat various diseases in animals and humans, so its high use causes this substance to be frequently found in effluents and in potable water reservoirs, causing serious problems for human health and the environment. Many processes are applied and evaluated in an attempt to removal tetracycline found in environment, such as adsorption. The application of iron-carbon nanoparticles with core-shell structure (Fe 3 O 4 @C) as adsorbent, can be an alternative to removal of these contaminants. In the present study Fe 3 O 4 @C nanoparticles were synthesized and used to adsorb tetracycline in aqueous solutions. The core-shell characterization was performed using X-ray diffraction techniques, infrared spectroscopy, surface area, chemical analysis and morphology, and adsorption capacity through isotherms. The results indicated that Fe 3 O 4 @C nanoparticles presented good tetracycline removal capability, 73.3%, when applied an initial concentration of antibiotic of the 30 mg L-1 and 0.5 g of adsorbent.

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Effect of initial pH on the tetracycline (TC) removal by zero-valent iron: Adsorption, oxidation and reduction

Cited by 265 publications

References 66 publications

A Review Paper on Heterogeneous Fenton Catalyst: Types of Preparation, Modification Techniques, Factors Affecting the Synthesis, Characterization, and Application in the Wastewater Treatment

A Review Paper on Heterogeneous Fenton Catalyst: Types of Preparation, Modification Techniques, Factors Affecting the Synthesis, Characterization, and Application in the Wastewater Treatment

Ag as Cocatalyst and Electron-Hole Medium in CeO2 QDs/Ag/Ag2Se Z-scheme Heterojunction Enhanced the Photo-Electrocatalytic Properties of the Photoelectrode

Obtaining of Fe3O4@C Core-Shell Nanoparticles as an Adsorbent of Tetracycline in Aqueous Solutions

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