Application of a photocatalytic ozonation process using TiO2 magnetic nanoparticles for the removal of Ceftazide from aqueous solutions: Evaluation of performance, comparative study and mechanism

Asgari, Esrafil; Farzadkia, Mahdi; Esrafili, Ali; Badi, Mojtaba Yegane; Jokandan, Sevda Fallah; Sobhi, Hamid Reza

doi:10.1016/j.ijleo.2020.164667

Cited by 33 publications

(11 citation statements)

References 35 publications

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“…This behavior may be due to the fact that ozone is a powerful oxidizing agent ( E 0 = 2.08 V) and can react with different classes of compounds in alkaline medium by rapid and non‐selective indirect reactions in which oxidative species are generated by their decomposition, particularly the formation of hydroxyl radicals 30, 31.…”

Section: Resultsmentioning

confidence: 99%

“…Ozonation has been reported in the literature to be more effective than photolysis for the degradation of organic substances and even better in the treatment of highly contaminated samples [29]. This behavior may be due to the fact that ozone is a powerful oxidizing agent (E 0 = 2.08 V) and can react with different classes of compounds in alkaline medium by rapid and nonselective indirect reactions in which oxidative species are generated by their decomposition, particularly the formation of hydroxyl radicals [30,31].…”

Section: Ozone Dosementioning

confidence: 99%

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Evaluation of Photocatalysis Based on Ozone/Goethite/Ultraviolet C for Caffeine Degradation

et al. 2023

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Caffeine is found in significant concentrations in the environment due to bioaccumulation and high resistance to conventional and biological treatments. It has critical effects on aquatic species and human health. Intensification of photocatalysis based on ozone (O3)/ultraviolet (UV) radiation type C/goethite (GHT) was applied in the degradation and mineralization of caffeine in solution by using a heterogeneous stirred‐tank photoreactor with artificial light. O3 dose and GHT charge were established as perturbation variables, and the effects of speed of agitation, pH, initial caffeine concentration, and UV light were evaluated before intensification to find the best conditions. With the O3/UV/GHT process, a degree of degradation of ca. 99.97 % for caffeine in water was reached in less than 20 min. The degree of mineralization achieved was 38.02 %.

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Section: Resultsmentioning

confidence: 99%

Section: Ozone Dosementioning

confidence: 99%

Evaluation of Photocatalysis Based on Ozone/Goethite/Ultraviolet C for Caffeine Degradation

et al. 2023

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“…40 Jawale et al 33 studied the effect of TiO 2 loading on potassium ferrocyanide degradation in the combined US + TiO 2 approach by varying TiO 2 loading from 0.01 to 0.15 g/L and reported an enhanced degradation until 0.1 g/L, whereas further addition of TiO 2 resulted only in a marginal increase. Asgari et al 35 reported similar results for ceftazide removal from an aqueous solution using ozone and TiO 2 magnetic nanoparticles where the degradation increased from 68.2% to 100% by enhancing the catalyst dose from 0.1 to 2 g/L. Jawale and Gogate 29 also investigated the degradation of KSCN using CuO as catalyst at different loadings as 0.5, 0.2, 0.15, and 0.1 g/L reporting the optimum loading as 0.15 g/L where maximum degradation was observed.…”

Section: Industrial and Engineeringmentioning

confidence: 99%

Ultrasound-Assisted Catalytic Ozonation-Based Treatment of Rare-Earth Processing Effluent Containing Ammonium Thiocyanate (NH₄SCN)

Vashishtha,

Bagal,

Iyer

et al. 2024

Ind. Eng. Chem. Res.

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The production of commercially important rare-earth elements in significant proportions also leads to the problem of industrial effluents containing metal oxides, cyanides, etc. generated from mining, mineral processing, and metallurgical operations. In the current work, ultrasound (US)-based methods are used for treatment of commercially obtained effluent from rare-earth metal processing industry containing ammonium thiocyanate (NH4SCN) as a major target contaminant. The effect of operating parameters as pH (actual values as 1, 3, 7, 9, 12), H2O2 loading (800 to 1400 ppm), O3 flow rate (0.5 to 2 L/min), and catalyst type (TiO2 or MnO2 at fixed loading of 1 g/L) on the efficacy of treatment was studied. The treatment of effluent using the approaches of US and ozone (flow rate as 0.5 L/min) alone under the constant conditions of 120 W and 70% duty cycle showed no chemical oxidation demand (COD) reduction; however, it was significantly improved on combination giving 54.83% reduction. Under optimized conditions, the approach of US + O3 at flow rate of 0.5 L/min and pH of 12 combined with H2O2 (1200 ppm) and catalyst TiO2 (1g/L) gave still higher COD reduction as 64.28% and 69.45%, respectively. The degradation of the contaminants using the US-based approaches followed a first-order kinetic mechanism, and a comparison of different approaches has been presented based on rate constants. Overall, it has been demonstrated that combined treatments based on US + O3 in the presence of catalyst can be an effective method for treatment of effluent obtained from rare-earth processing.

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“…Despite that the catalytic ozonation process relies on a complex heterogeneous system (solid-gas-liquid), its performances are remarkable since most of these systems eliminate recalcitrant pollutants and set the quality parameters of treated water in the range established by environmental agencies. To be able to avoid the cumbersome separation step of the catalyst from treated water, a catalyst with a magnetic core was introduced [23,[31][32][33][34][35][36]. Another interesting approach, that is unexploited in catalytic ozonation, although widely used in various other applications, is represented by thin films [37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Removal of Paracetamol from Aqueous Solutions by Photocatalytic Ozonation over TiO2-MexOy Thin Films

Avramescu

Fierăscu

et al. 2022

Nanomaterials

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Analgesics and nonsteroidal anti-inflammatory drugs (NSAIDs) such as paracetamol, diclofenac, and ibuprofen are frequently encountered in surface and ground water, thereby posing a significant risk to aquatic ecosystems. Our study reports the catalytic performances of nanosystems TiO2 -MexOy (Me = Ce, Sn) prepared by the sol-gel method and deposited onto glass slides by a dip-coating approach in the removal of paracetamol from aqueous solutions by catalytic ozonation. The effect of catalyst type and operation parameters on oxidation efficiency was assessed. In addition to improving this process, the present work simplifies it by avoiding the difficult step of catalyst separation. It was found that the thin films were capable of removing all pollutants from target com-pounds to the oxidation products.

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Application of a photocatalytic ozonation process using TiO2 magnetic nanoparticles for the removal of Ceftazide from aqueous solutions: Evaluation of performance, comparative study and mechanism

Cited by 33 publications

References 35 publications

Evaluation of Photocatalysis Based on Ozone/Goethite/Ultraviolet C for Caffeine Degradation

Evaluation of Photocatalysis Based on Ozone/Goethite/Ultraviolet C for Caffeine Degradation

Ultrasound-Assisted Catalytic Ozonation-Based Treatment of Rare-Earth Processing Effluent Containing Ammonium Thiocyanate (NH₄SCN)

Removal of Paracetamol from Aqueous Solutions by Photocatalytic Ozonation over TiO2-MexOy Thin Films

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Application of a photocatalytic ozonation process using TiO2 magnetic nanoparticles for the removal of Ceftazide from aqueous solutions: Evaluation of performance, comparative study and mechanism

Cited by 33 publications

References 35 publications

Evaluation of Photocatalysis Based on Ozone/Goethite/Ultraviolet C for Caffeine Degradation

Evaluation of Photocatalysis Based on Ozone/Goethite/Ultraviolet C for Caffeine Degradation

Ultrasound-Assisted Catalytic Ozonation-Based Treatment of Rare-Earth Processing Effluent Containing Ammonium Thiocyanate (NH4SCN)

Removal of Paracetamol from Aqueous Solutions by Photocatalytic Ozonation over TiO2-MexOy Thin Films

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Ultrasound-Assisted Catalytic Ozonation-Based Treatment of Rare-Earth Processing Effluent Containing Ammonium Thiocyanate (NH₄SCN)