Degradation mechanisms of ofloxacin and cefazolin using peroxymonosulfate activated by reduced graphene oxide-CoFe2O4 composites

Fan, Yiting; Zhou, Zhengyuan; Feng, Yong; Zhou, Ying; Lei, Wen; Shih, Kaimin

doi:10.1016/j.cej.2019.123056

Cited by 75 publications

(24 citation statements)

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“…The presence of chalcogens such as N, O and S on the composite played significant role in persulfate activation and a corresponding increase in the activity of the composites. The mechanism of PMS activation by rGO-CoFe 2 O 4 for ofloxacin and cefazolin degradation was reported by Fan et al [135]. The study showed that while sulfate radicals were the major active species in ofloxacin degradation, non-radical oxidation by PMS direct two-electron transfer was prevalent in cefazolin degradation.…”

Section: Chemical Oxidation Processesmentioning

confidence: 79%

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: Chemical Oxidation Processesmentioning

confidence: 79%

Graphene-Based Composites as Catalysts for the Degradation of Pharmaceuticals

Olatunde

Onwudiwe

2021

IJERPH

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“…The identification of intermediate compounds resulting from antibiotic degradation, their toxicity, and residual antimicrobial activity is crucial to establishing the process efficiency; likewise, knowing the different degradation steps is the key to improving each treatment [ 201 ]. In this respect, Fan et al (2019) proposed a degradation route of Cefazolin (CZ) from an advanced oxidation process with activated peroxymonosulfate (PMS); high molecular weight sulfoxide compounds were identified ( Figure 1 a) [ 202 ]. Some authors also have identified intermediates generated in the degradation of Cefazolin (CZ) by using oxidation reactions; Li et al (2016) used permanganate (Mn (VII)) as an oxidant and identified five intermediates, of which one of these matches the compounds detected by Fan et al (2019), ( Figure 1 b) [ 200 ].…”

Section: Overviews Of Degradation Of Antibioticsmentioning

confidence: 99%

“… Some intermediates generated and degradation steps of Cefazolin (CZ) from different techniques, m / z is the mass to charge ratio. ( a ) degradation of Cefazolin (CZ) in an oxidation process with activated peroxymonosulfate (PMS) [ 202 ]. ( b ) intermediates generated from an oxidation process with permanganate (Mn (VII)) [ 200 ].…”

Section: Overviews Of Degradation Of Antibioticsmentioning

confidence: 99%

“…Other techniques, such as sonocatalysis have also identified some intermediates (Figure 1f) [206]. [202]. (b) intermediates generated from an oxidation process with permanganate (Mn (VII)) [200].…”

Section: Sonocatalytic Degradation Of Antibioticsmentioning

confidence: 99%

“…Moreover, other authors have evaluated the degradation of Levofloxacin (LVX) using photocatalysis under different conditions, generating different compounds (Figure 2d) [202,215,216]. Sonocatalysis also has been tested for the degradation of Levofloxacin (LVX); Wei et al, (2015) proposed the possible degradation steps to achieve the mineralization of the compound (Figure 2e) [217].…”

Section: Sonocatalytic Degradation Of Antibioticsmentioning

confidence: 99%

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Impact of Antibiotics as Waste, Physical, Chemical, and Enzymatical Degradation: Use of Laccases

et al. 2022

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The first traces of Tetracycline (TE) were detected in human skeletons from Sudan and Egypt, finding that it may be related to the diet of the time, the use of some dyes, and the use of soils loaded with microorganisms, such as Streptomyces spp., among other microorganisms capable of producing antibiotics. However, most people only recognise authors dating between 1904 and 1940, such as Ehrlich, Domagk, and Fleming. Antibiotics are the therapeutic option for countless infections treatment; unfortunately, they are the second most common group of drugs in wastewaters worldwide due to failures in industrial waste treatments (pharmaceutics, hospitals, senior residences) and their irrational use in humans and animals. The main antibiotics problem lies in delivered and non-prescribed human use, use in livestock as growth promoters, and crop cultivation as biocides (regulated activities that have not complied in some places). This practice has led to the toxicity of the environment as antibiotics generate eutrophication, water pollution, nutrient imbalance, and press antibiotic resistance. In addition, the removal of antibiotics is not a required process in global wastewater treatment standards. This review aims to raise awareness of the negative impact of antibiotics as residues and physical, chemical, and biological treatments for their degradation. We discuss the high cost of physical and chemical treatments, the risk of using chemicals that worsen the situation, and the fact that each antibiotic class can be transformed differently with each of these treatments and generate new compounds that could be more toxic than the original ones; also, we discuss the use of enzymes for antibiotic degradation, with emphasis on laccases.

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