Photocatalytic performance of Ti/MMO/ZnO at degradation of levofloxacin: Effect of pH and chloride anions

Goulart, Lorena Athie; Moratalla, Ángela; Lanza, Marcos R.V.; Sáez, Cristina; Rodrigo, Manuel A.

doi:10.1016/j.jelechem.2020.114894

Cited by 24 publications

(3 citation statements)

References 50 publications

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“…Subsequently, the opening of benzene rings lead to the production of L16 (m/z = 80) and L17 (m/z = 54). Finally, intermediate L17 products might be continuously broken into small-molecule organic acids and mineralization products [49][50][51][52][53][54][55][56].…”

Section: Possible Degradation Routes Of Lvxmentioning

confidence: 99%

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

Han

et al. 2021

Materials

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Presently, in the context of the novel coronavirus pneumonia epidemic, several antibiotics are overused in hospitals, causing heavy pressure on the hospital’s wastewater treatment process. Therefore, developing stable, safe, and efficient hospital wastewater treatment equipment is crucial. Herein, a bench-scale electrooxidation equipment for hospital wastewater was used to evaluate the removal effect of the main antibiotic levofloxacin (LVX) in hospital wastewater using response surface methodology (RSM). During the degradation process, the influence of the following five factors on total organic carbon (TOC) removal was discussed and the best reaction condition was obtained: current density, initial pH, flow rate, chloride ion concentration, and reaction time of 39.6 A/m2, 6.5, 50 mL/min, 4‰, and 120 min, respectively. The TOC removal could reach 41% after a reaction time of 120 min, which was consistent with the result predicted by the response surface (40.48%). Moreover, the morphology and properties of the electrode were analyzed. The degradation pathway of LVX was analyzed using high-performance liquid chromatography–mass spectrometry (LC–MS). Subsequently, the bench-scale electrooxidation equipment was changed into onboard-scale electrooxidation equipment, and the onboard-scale equipment was promoted to several hospitals in Dalian.

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Section: Possible Degradation Routes Of Lvxmentioning

confidence: 99%

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

Han

et al. 2021

Materials

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“…Photocatalytic degradation has the advantages of being eco-friendly, simple, economic, nontoxic, highly stabile and possesses excellent degradation efficiency (Jiang et al 2012). Literature reviews have revealed the use of nanoparticles as photocatalysts for the removal of the three studied antibiotics using different metal nanocomposites such as silver, zinc, iron and titanium oxide nanoparticles (Shokri et al 2016;Naraginti et al 2019;Sayadi et al 2019;El-Maraghy et al 2020;Hashemi et al 2020;Mehrdoost et al 2021;Salesi and Nezamzadeh-Ejhieh 2022), graphene composites (Li et al 2020a), and functionalised iron magnetic nanocatalysts (Shokri et al 2016;Naraginti et al 2019;Sayadi et al 2019;El-Maraghy et al 2020;Li et al 2020a;Goulart et al 2021;Gulen et al 2021;Guo et al 2021;Hu et al 2021;Mehrdoost et al 2021;Shen et al 2021;Zhang et al 2021;Salesi and Nezamzadeh-Ejhieh 2022;Abdullah et al 2023), as shown in Supplementary Table S1.…”

Section: Introductionmentioning

confidence: 99%

Response surface optimised photocatalytic degradation and quantitation of repurposed COVID-19 antibiotic pollutants in wastewaters; towards greenness and whiteness perspectives

Elbalkiny,

El-Borady,

Saleh

et al. 2023

Environ. Chem.

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Environmental context The consumption of repurposed antibiotics increased due to the management of COVID-19, which in turn led to their increased presence in wastewater and potential environmental effects. This change has created a greater need for their analysis and treatment in different environmental water. This work presents a safe, low-cost method for analysing and treating water samples to ensure their suitability for human and animal use. Rationale Certain antibiotics have been repurposed for the management of infected COVID-19 cases, because of their possible effect against the virus, and treatment of co-existing bacterial infection. The consumption of these antibiotics leads to their access to sewage, industrial and hospital effluents, then to environmental waters. This creates a need for the routine analysis and treatment of water resources. Methodology Detection and quantitation of three repurposed antibiotics: levofloxacin (LEVO), azithromycin (AZI) and ceftriaxone (CEF) were studied in different water samples using LC-MS/MS methods employing a C18 column and a mobile phase consisting of 80% acetonitrile/20% (0.1% formic acid in water) after solid phase extraction on Oasis HLB Prime cartridges. Real water samples were treated with synthesised graphitic carbon nitride (g-C3N4) to remove the three types of antibiotics from contaminated water under experimental conditions optimised by response surface methodology, using Box–Behnken experimental design. Results The analytical method was validated in the concentration range of 10–5000 ng mL–1 for the three drugs. The removal percentages were found to be 92.55, 98.48 and 99.10% for LEVO, AZI and CEF, respectively, using synthesised g-C3N4. Discussion The analytical method was used for the estimation of the three cited drugs before and after their removal. The method was assessed using ComplexGAPI as a greenness tool and the RGB 12 algorithm as a whiteness model. The method was applied for the analysis and treatment of real water samples before and after their treatment. It proved to be simple, low-cost and environmentally sustainable.

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“…Antibiotics are the most frequently detected in the environment, and benzylpenicillin, or penicillin G (PenG), is a persistent chemical compound in the aquatic environment that shows nonbiodegradable behavior and a high level of toxicity to Vibrio fischeri and Daphnia Magna [3,4]. The antimicrobial nature of antibiotics precludes their effective removal in conventional wastewater treatment plants (WWTPs) [5,6]. Furthermore, the range of detected concentrations may be larger depending on the type of effluent.…”

Section: Introductionmentioning

confidence: 99%

Electro-Fenton-Based Technologies for Selectively Degrading Antibiotics in Aqueous Media

et al. 2022

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The viability of the Electro-Fenton (EF) process in the selective degradation of penicillin G (PenG) in complex solutions has been studied. The role of the anode material (boron-doped diamond (BDD) or mixed metal oxide (MMO)) and the cathode 3D support (foam or mesh), as well as the synergistic effect of UVC light irradiation (photoelectron-Fenton, PEF), have been evaluated. The results show that Pen G can be efficiently and selectively removed by EF, obtaining higher PenG removal rates when using the BDD anode (100%) than when using the MMO anode (75.5%). Additionally, mineralization is not favored under the experimental conditions tested (pH 3, 5 mA cm−2), since both aromatic and carboxylic acids accumulate in the reaction system as final products. In this regard, the EF-treated solution presents a high biological oxygen demand and a low percentage of Vibrio fischeri inhibition, which leads to high biodegradability and low toxicity of this final effluent. Furthermore, the combination with UVC radiation in the PEF process shows a clear synergistic effect on the degradation of penicillin G: 166.67% and 83.18% using MMO and BBD anodes, respectively. The specific energy required to attain the complete removal of PenG and high inhibition of the antibiotic effect is less than 0.05 Ah dm−3. This confirms that PEF can be efficiently used as a pretreatment of conventional wastewater treatment plants to decrease the chemical risk of complex solutions polluted with antibiotics.

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Photocatalytic performance of Ti/MMO/ZnO at degradation of levofloxacin: Effect of pH and chloride anions

Cited by 24 publications

References 50 publications

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

Electrocatalytic Degradation of Levofloxacin, a Typical Antibiotic in Hospital Wastewater

Response surface optimised photocatalytic degradation and quantitation of repurposed COVID-19 antibiotic pollutants in wastewaters; towards greenness and whiteness perspectives

Electro-Fenton-Based Technologies for Selectively Degrading Antibiotics in Aqueous Media

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