In-situ electro-generation and activation of hydrogen peroxide using a CuFeNLDH-CNTs modified graphite cathode for degradation of cefazolin

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Ghasemi , M , Khataee , A , Gholami , P , Soltani , R D C , Hassani , A & Orooji , Y 2020 , ' In-situ electro-generation and activation of hydrogen peroxide using a CuFeNLDH-CNTs modified graphite cathode for degradation of cefazolin ' , Journal of Environmental Management , vol. 267 , 110629 . https://doi.org/10.1016/j.jenvman.2020.110629

Title: In-situ electro-generation and activation of hydrogen peroxide using a CuFeNLDH-CNTs modified graphite cathode for degradation of cefazolin
Author: Ghasemi, Masoumeh; Khataee, Alireza; Gholami, Peyman; Soltani, Reza Darvishi Cheshmeh; Hassani, Aydin; Orooji, Yasin
Contributor organization: Department of Chemistry
Date: 2020-08-01
Language: eng
Number of pages: 13
Belongs to series: Journal of Environmental Management
ISSN: 0301-4797
DOI: https://doi.org/10.1016/j.jenvman.2020.110629
URI: http://hdl.handle.net/10138/346533
Abstract: The modified multifunctional electrodes for electro-Fenton (EF) process are suggested to be promising cathodes for in situ electro-generation and activation of H2O2 to produce hydroxyl radicals ((OH)-O-center dot). However, heterogeneous EF process still faces the challenges of limited catalytic activity and releasing of massive amounts of transition metals to the solution after removal of organic pollutants. The main aim of the present investigation was to prepare a cathode containing carbon nanotubes (CNTs) and CuFe nano-layered double hydroxide (NLDH) for degradation and mineralization of cefazolin antibiotic through electro-Fenton process. Structural and electrochemical analyses demonstrated that CuFeNLDH-CNTs nanocomposite was successfully incorporated on the surface of graphite cathode. Due to the increased formation of (OH)-O-center dot in the reactor, the incorporation of CNTs into NLDH matrix with a catalyst loading of 0.1 g substantially improved the degradation efficiency of cefazolin (89.9%) in comparison with CNTs-coated (28.7%) and bare graphite cathode (22.8%) within 100 mM. In the presence of 15 mM of ethanol, the degradation efficiency of cefazolin was remarkably decreased to 43.7% by the process, indicating the major role of (OH)-O-center dot in the destruction of target molecules. Acidic conditions favored the degradation efficiency of cefazolin by the modified EF process. Mineralization efficiency of the bio-refractory compound was obtained to be 70.1% in terms of chemical oxygen demand (COD) analysis after 300 min. The gas chromatography-mass spectroscopy (GC-MS) analysis was also implemented to identify the intermediate byproducts generated during the degradation of cefazolin in the CuFeNLDH-CNTs/EF reactor.
Subject: Electrochemical advanced oxidation processes (EAOPs)
Antibiotic compound
Layered double hydroxide
Carbon nanotubes
Fenton reaction
BETA-LACTAM ANTIBIOTICS
WIDE PH RANGE
PHOTOCATALYTIC DEGRADATION
FENTON DEGRADATION
TEXTILE DYE
OXIDATION
OPTIMIZATION
PERFORMANCE
CATALYST
REMOVAL
116 Chemical sciences
Peer reviewed: Yes
Rights: cc_by_nc_nd
Usage restriction: openAccess
Self-archived version: acceptedVersion


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