Enhanced photocatalytic degradation of sulfamethoxazole by zinc oxide photocatalyst in the presence of fluoride ions: Optimization of parameters and toxicological evaluation

Mirzaei, Amir; Yerushalmi, Laleh; Chen, Zhi; Haghighat, Fariborz; Guo, Jianbo

doi:10.1016/j.watres.2018.01.016

Cited by 130 publications

(37 citation statements)

References 58 publications

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“…To address this emerging issue, the scientific community turned to developing new advanced processes to remove persistent pollutants from waters and wastewaters [11]. For the removal of antibiotics like sulfamethoxazole and amoxicillin, a large number of technologies have been investigated, such as ozonation [12], electrolysis [13], wet peroxide oxidation [14], Fenton and Fenton-like reactions [15,16], sonocatalysis [17], UV/H 2 O 2 [18] and photocatalysis [19][20][21][22]. Amongst the various processes, photocatalysis seems to be the most interesting one since the possible use of solar energy can lead to an integrated green solution with a minimal energy footprint [23].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

et al. 2019

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This work examined the photocatalytic destruction of sulfamethoxazole (SMX), a widely used antibiotic, under simulated solar radiation using iron-doped titanium dioxide as the photocatalyst. Amongst the various iron/titania ratios examined (in the range 0%–2%), the catalyst at 0.04% Fe/TiO2 molar ratio exhibited the highest photocatalytic efficiency. The reaction rate followed pseudo-first-order kinetics, where the apparent kinetic constant was reduced as the initial concentration of SMX or humic acid increased. The photodecomposition of SMX was favored in natural pH but retarded at alkaline conditions. Unexpectedly, the presence of bicarbonates (in the range of 0.125–2 g/L) improved the removal of SMX, however, experiments conducted in real environmental matrices showed that process efficiency decreased as the complexity of the water matrix increased. The presence of sodium persulfate as an electron acceptor enhanced the reaction rate. However, only a small synergy was observed between the two individual processes. On the contrary, the addition of tert-butanol, a well-known hydroxyl radical scavenger, hindered the reaction, indicating the significant contribution of these radicals to the photocatalytic degradation of SMX. The photocatalyst retained half of its initial activity after five successive experiments.

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Section: Introductionmentioning

confidence: 99%

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

et al. 2019

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“…ZnO [52] (see also reviews [53,54] ). The use of semiconductor nanomaterials presents a smart strategy to solve future problems owing to their unique optical, electrical, and magnetic properties.…”

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confidence: 99%

Facile combustion synthesis of Ag₂O nanoparticles using cantaloupe seeds and their multidisciplinary applications

Vinay

Udayabhanu²,

Sumedha³

et al. 2020

Applied Organom Chemis

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Silver oxide nanoparticles (Ag2O NPs) were prepared using cantaloupe (Cucumis melo) seeds as a fuel by employing a green synthesis method. The prepared Ag2O NPs were investigated using powder X‐ray diffraction (PXRD), UV–visible spectrum, Fourier transform infrared analysis, transmission electron microscopy (TEM), scanning electron microscopy (SEM) with energy‐dispersive spectroscopy, and photoluminescence studies. PXRD data reveal the establishment of cubic crystal structure of Ag2O NPs. According to SEM and TEM results, the morphology of the prepared NPs was agglomerated and spherical. The photodegradation activity of the prepared Ag2O NPs over methylene blue dye was promising under visible light irradiation. Furthermore, the antimicrobial assay of the synthesized Ag2O NPs was carried out by the disc diffusion method against Gram‐positive and Gram‐negative microbial strains.

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“…The other group is called the test network and was evaluated with the remaining 15 data sets. Different hidden layer nodes (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) were selected to establish a network and determine the optimal number of neurons by training the MSE for training the network using different neuron number conditions. The relationship between the MSE and the number of neurons is illustrated in Fig.…”

Section: Ann Modelling and Optimization Of Parametersmentioning

confidence: 99%

“…The adverse health effects, such as enhancement of antibiotic resistance, have been increasingly reported, but the consequences caused by long-lasting exposure to trace amounts of such synthetic antimicrobial agents remain uncertain. [1][2][3][4][5] In this study, sulfamethoxazole (SMX), a typical broad-spectrum sulfonamide antibiotic used to combat Gram-positive and Gram--negative aerobic bacteria, was selected as a model pollutant. 6,7 In recent years, SMX has been detected in surface water, hospital effluents, and drinking water, thus posing a potential environmental risk.…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical oxidation of sulfamethoxazole using Ti/SnO2-Sb/Co-PbO2 electrode through ANN-PSO

et al. 2019

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Even in a trace amounts, the presence of antibiotics in aqueous solution is getting more and more attention. Accordingly, appropriate technologies are needed to efficiently remove these compounds from aqueous environments. In this study, we have examined the electrochemical oxidation (EO) of sulfamethoxazole (SMX) on a Co modified PbO 2 electrode. The process of EO of SMX in aqueous solution followed the pseudo-first-order kinetics, and the removal efficiency of SMX reached the maximum value of 95.1 % within 60 min. The effects of major factors on SMX oxidation kinetics were studied in detail by single-factor experiments, namely current density (1-20 mA cm-2), solution pH value (2-10), initial concentration of SMX (10-500 mg L-1) and concentration of electrolytes (0.05-0.4 mol L-1). An artificial neural network (ANN) model was used to simulate this EO process. Based on the obtained model, particle swarm optimization (PSO) was used to optimize the operating parameters. The maximum removal efficiency of SMX was obtained at the optimized conditions (e.g., current density of 12.37 mA cm-2 , initial pH value of 4.78, initial SMX concentration of 74.45 mg L-1 , electrolyte concentration of 0.24 mol L-1 and electrolysis time of 51.49 min). The validation results indicated that this method can ideally be used to optimize the related parameters and predict the anticipated results with acceptable accuracy.

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Enhanced photocatalytic degradation of sulfamethoxazole by zinc oxide photocatalyst in the presence of fluoride ions: Optimization of parameters and toxicological evaluation

Cited by 130 publications

References 58 publications

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

Facile combustion synthesis of Ag₂O nanoparticles using cantaloupe seeds and their multidisciplinary applications

Electrochemical oxidation of sulfamethoxazole using Ti/SnO2-Sb/Co-PbO2 electrode through ANN-PSO

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Enhanced photocatalytic degradation of sulfamethoxazole by zinc oxide photocatalyst in the presence of fluoride ions: Optimization of parameters and toxicological evaluation

Cited by 130 publications

References 58 publications

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

Degradation of Sulfamethoxazole Using Iron-Doped Titania and Simulated Solar Radiation

Facile combustion synthesis of Ag2O nanoparticles using cantaloupe seeds and their multidisciplinary applications

Electrochemical oxidation of sulfamethoxazole using Ti/SnO2-Sb/Co-PbO2 electrode through ANN-PSO

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Facile combustion synthesis of Ag₂O nanoparticles using cantaloupe seeds and their multidisciplinary applications