Degradation of chloramphenicol and metronidazole by electro-Fenton process using graphene oxide-Fe3O4 as heterogeneous catalyst

Görmez, Fatma; Görmez, Özkan; Gözmen, Belgin; Kalderis, Dimitrios

doi:10.1016/j.jece.2019.102990

Cited by 71 publications

(15 citation statements)

References 55 publications

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“…The degradation efficiency was influenced by the amount and nature of heteroatom, while the mineralization efficiency was strongly correlated to the amount of iron leached from the catalyst. The degradation efficiency of homogeneous and heterogeneous electro-Fenton process using FeSO 4 •7H 2 O and graphene oxide-Fe 3 O 4 composite respectively as catalyst for the degradation of chloramphenicol and metronidazole was reported by Görmez, et al [189]. The study showed that 57 and 71% mineralization was obtained for the degradation of 80 g/L −1 metronidazole and chloramphenicol after 300 min for the homogenous process.…”

Section: Electrocatalytic Processmentioning

confidence: 86%

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Olatunde

Onwudiwe

2021

IJERPH

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The incessant release of pharmaceuticals into the aquatic environment continues to be a subject of increasing concern. This is because of the growing demand for potable water sources and the potential health hazards which these pollutants pose to aquatic animals and humans. The inability of conventional water treatment systems to remove these compounds creates the need for new treatment systems in order to deal with these class of compounds. This review focuses on advanced oxidation processes that employ graphene-based composites as catalysts for the degradation of pharmaceuticals. These composites have been identified to possess enhanced catalytic activity due to increased surface area and reduced charge carrier recombination. The techniques employed in synthesizing these composites have been explored and five different advanced oxidation processes—direct degradation process, chemical oxidation process, photocatalysis, electrocatalyis processes and sonocatalytic/sono-photocatalytic processes—have been studied in terms of their enhanced catalytic activity. Finally, a comparative analysis of the processes that employ graphene-based composites was done in terms of process efficiency, reaction rate, mineralization efficiency and time required to achieve 90% degradation.

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Section: Electrocatalytic Processmentioning

confidence: 86%

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Olatunde

Onwudiwe

2021

IJERPH

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“…Several authors have reported the applicability of AOPs to degrade chloramphenicol by hydroxyl and sulphate radical-based mechanisms [62,63]. Görmez et al [45] reported the potential of GO-Fe 3 O 4 as an electro-Fenton catalyst, noting around 80% mineralisation following 300 min treatment under optimal conditions with 16% higher TOC removal when compared to the homogeneous electro-Fenton process. The authors suggested relatively higher activation energy was required for the initiation step of the degradation reaction due to the slow decay of the parent compound.…”

Section: Antibioticsmentioning

confidence: 99%

Heterogeneous Electro-Fenton as “Green” Technology for Pharmaceutical Removal: A Review

et al. 2021

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The presence of pharmaceutical products in the water cycle may cause harmful effects such as morphological, metabolic and sex alterations in aquatic organisms and the selection/development of organisms resistant to antimicrobial agents. The compounds’ stability and persistent character hinder their elimination by conventional physico-chemical and biological treatments and thus, the development of new water purification technologies has drawn great attention from academic and industrial researchers. Recently, the electro-Fenton process has been demonstrated to be a viable alternative for the removal of these hazardous, recalcitrant compounds. This process occurs under the action of a suitable catalyst, with the majority of current scientific research focused on heterogeneous systems. A significant area of research centres working on the development of an appropriate catalyst able to overcome the operating limitations associated with the homogeneous process is concerned with the short service life and difficulty in the separation/recovery of the catalyst from polluted water. This review highlights a present trend in the use of different materials as electro-Fenton catalysts for pharmaceutical compound removal from aquatic environments. The main challenges facing these technologies revolve around the enhancement of performance, stability for long-term use, life-cycle analysis considerations and cost-effectiveness. Although treatment efficiency has improved significantly, ongoing research efforts need to deliver economic viability at a larger scale due to the high operating costs, primarily related to energy consumption.

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“…Akerdi et al [141] have also employed well-dispersed Fe3O4 nanoparticles on GO and rGO to enhance the removal of two dyes, methylene blue and acid red. Shen et al [145] have employed graphene-Fe3O4 hollow hybrid microspheres, while graphene oxide-Fe3O4 was employed as a heterogeneous catalyst for the E-Fenton degradation of two antibiotics, chloramphenicol and metronidazole [137]. Fe3O4 particles have also been utilised with N-doped graphene-based aerogels for the degradation of acetaminophen with a low iron leaching of The oxides Fe 2 O 3 , Fe 3 O 4 and FeOOH, and ferrocene, which all contain the Fe 2+ /Fe 3+ redox pair, have been employed [138][139][140], while graphene-containing composites have been combined with Fe 3 O 4 [141,142], FeOOH [102], zero valent iron [143] and ferrocene [58].…”

Section: Graphene-based Materials Combined With Iron Oxides and Other Metal Oxidesmentioning

confidence: 99%

Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process

Tian

Breslin

2020

Materials

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In recent years, graphene-based materials have been identified as an emerging and promising new material in electro-Fenton, with the potential to form highly efficient metal-free catalysts that can be employed in the removal of contaminants from water, conserving precious water resources. In this review, the recent applications of graphene-based materials in electro-Fenton are described and discussed. Initially, homogenous and heterogenous electro-Fenton methods are briefly introduced, highlighting the importance of the generation of H2O2 from the two-electron reduction of dissolved oxygen and its catalysed decomposition to produce reactive and oxidising hydroxy radicals. Next, the promising applications of graphene-based electrodes in promoting this two-electron oxygen reduction reaction are considered and this is followed by an account of the various graphene-based materials that have been used successfully to give highly efficient graphene-based cathodes in electro-Fenton. In particular, graphene-based composites that have been combined with other carbonaceous materials, doped with nitrogen, formed as highly porous aerogels, three-dimensional materials and porous gas diffusion electrodes, used as supports for iron oxides and functionalised with ferrocene and employed in the more effective heterogeneous electro-Fenton, are all reviewed. It is perfectly clear that graphene-based materials have the potential to degrade and mineralise dyes, pharmaceutical compounds, antibiotics, phenolic compounds and show tremendous potential in electro-Fenton and other advanced oxidation processes.

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Degradation of chloramphenicol and metronidazole by electro-Fenton process using graphene oxide-Fe3O4 as heterogeneous catalyst

Cited by 71 publications

References 55 publications

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Heterogeneous Electro-Fenton as “Green” Technology for Pharmaceutical Removal: A Review

Graphene-Modified Composites and Electrodes and Their Potential Applications in the Electro-Fenton Process

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