Enhancement of photocatalytic degradation of ibuprofen contained in water using a static mixer

Núñez-Flores, A.; Sandoval, Alberto; Mancilla, Ernesto; Hidalgo-Millán, Antonio; Ascanio, Gabriel

doi:10.1016/j.cherd.2020.01.018

Cited by 16 publications

(7 citation statements)

References 31 publications

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“…The hydroxyl radical, with a one-electron reduction potential of +2.33 V, is a powerful oxidant reacting with organic species such as ibuprofen compared to hydroperoxyl (−0.88 V) and peroxyl radical (−2.40 V). 69,70 …”

Section: Resultsmentioning

confidence: 99%

“…The hydroxyl radical, with a one-electron reduction potential of +2.33 V, is a powerful oxidant reacting with organic species such as ibuprofen compared to hydroperoxyl (À0.88 V) and peroxyl radical (À2.40 V). 69,70 Salicylic acid can be used as a probe molecule to experimentally identify the presence of hydroxyl radical. [71][72][73][74][75] The model reaction between salicylic acid and OHc radical forms two primary products, designated as 2,3-dihydroxybenzoic acid and 2,5-dihydroxybenzoic acid, shown in Fig.…”

Section: Effect Of the Mass And Ph On The By-product Formationmentioning

confidence: 99%

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Photocatalytic degradation of ibuprofen using titanium oxide: insights into the mechanism and preferential attack of radicals

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Section: Effect Of the Mass And Ph On The By-product Formationmentioning

confidence: 99%

Photocatalytic degradation of ibuprofen using titanium oxide: insights into the mechanism and preferential attack of radicals

et al. 2021

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“…Heterogeneous photocatalysis is a versatile and environmentally friendly technology that uses solar irradiation (UV-vis-IR spectral range) at room temperature and pressure conditions, favoring photoreactions that generate few by-products and allow the recycling of the photocatalysts [ 11 ]. Degradation of IBU has been carried out by ozonation processes [ 12 ], photo-fenton [ 13 ], and photocatalysis [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

A Brief Photocatalytic Study of ZnO Containing Cerium towards Ibuprofen Degradation

et al. 2021

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Ibuprofen (IBU) is one of the most-sold anti-inflammatory drugs in the world, and its residues can reach aquatic systems, causing serious health and environmental problems. Strategies are used to improve the photocatalytic activity of zinc oxide (ZnO), and thosethat involvethe inclusion of metalhave received special attention. The aim of this work was to investigate the influence of the parameters and toxicity of a photoproduct using zinc oxide that contains cerium (ZnO-Ce) for the photodegradation of ibuprofen. The parameters include the influence of the photocatalyst concentration (0.5, 0.5, and 1.5 g L−1) as well as the effects of pH (3, 7, and 10), the effect of H2O2, and radical scavengers. The photocatalyst was characterized by Scanning Electron Microscopy-Energy Dispersive Spectroscopy, Transmission electron microscopy, Raman, X-Ray Diffraction, surface area, and diffuse reflectance. The photocatalytic activity of ibuprofen was evaluated in an aqueous solution under UV light for 120 min. The structural characterization by XRD and SEM elucidated the fact that the nanoparticle ZnO contained cerium. The band gap value was 3.31 eV. The best experimental conditions for the photodegradation of IBU were 60% obtained in an acidic condition using 0.50 g L−1 of ZnO-Ce in a solution of 20 ppm of IBU. The presence of hydrogen peroxide favored the photocatalysis process. ZnO-Ce exhibited good IBU degradation activity even after three photocatalytic cycles under UV light. The hole plays akey role in the degradation process of ibuprofen. The toxicity of photolyzed products was monitored against Artemia salina (bioindicator) and did not generate toxic metabolites. Therefore, this work provides a strategic design to improve ZnO-Ce photocatalysts for environmental remediation.

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“…Among them, heterogeneous photocatalysis is considered to be a promising way to remove pollutants in water bodies. , In this technology, the state of the catalyst in the reactor has two forms: immobile and suspended. Because the suspended catalyst can provide a larger surface area and has a better catalytic effect, the photocatalytic reaction in the slurry system has been extensively studied. − However, the researchers found that low lighting efficiency (light scattering and absorption) and mass transfer limitation severely restricted the reaction efficiency of the slurry system. , Therefore, different photocatalytic reactors have been developed and studied to enhance the photocatalytic process, such as static mixers, corrugated plate reactors, microreactors, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the advantages of microreactors, spiral microchannels can improve the mixing characteristics inside the microchannels through the secondary flow (Dean vortex) caused by the spiral shape, which can further enhance the mass transfer. , Peralta Muniz Moreira et al revealed that photochemical peroxidation degradation of micropollutants in spiral microcapillary membranes can strongly promote radial mixing through computational fluid dynamics, thereby increasing the mass transfer and removal rate of micropollutants . In addition, the enhanced mixing can keep the catalyst particles in a good suspended state, which can provide more reaction surface area . In summary, the spiral microchannel reactor has the advantages of fast mass transfer rate and good light conditions for the degradation of OTC in slurry systems.…”

Section: Introductionmentioning

confidence: 99%

Study on High-Efficiency Photocatalytic Degradation of Oxytetracycline Based on a Spiral Microchannel Reactor

Jia

Jin

et al. 2021

Ind. Eng. Chem. Res.

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In this work, a spiral microchannel reactor was used to study the photocatalytic degradation process of oxytetracycline (OTC) in a titanium dioxide (TiO2) slurry system. The influence of parameters such as residence time, TiO2 dosage, OTC concentration, light intensity, and concentration of added ions (NO3 –, SO4 2–, Ca2+, Fe3+) on OTC removal was systematically investigated, and the degradation stability of OTC in the microreactor was evaluated. The results show that under the best experimental conditions, the degradation rate of OTC can reach 99.33%, the initial stage apparent reaction rate constant is 7.7124 min–1, and the space–time yield is 142.79 m3 pollutants/(m3 reactor day). In addition, the results prove the high efficiency and stability of OTC degradation in the microreactor. OTC can be efficiently degraded under high TiO2 dosage, high initial OTC concentration, and low light intensity, which demonstrates the outstanding advantages of spiral microchannels for OTC degradation in slurry systems. This study has a guiding significance for the efficient photocatalytic degradation of tetracycline antibiotics in slurry systems.

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Enhancement of photocatalytic degradation of ibuprofen contained in water using a static mixer

Cited by 16 publications

References 31 publications

Photocatalytic degradation of ibuprofen using titanium oxide: insights into the mechanism and preferential attack of radicals

Photocatalytic degradation of ibuprofen using titanium oxide: insights into the mechanism and preferential attack of radicals

A Brief Photocatalytic Study of ZnO Containing Cerium towards Ibuprofen Degradation

Study on High-Efficiency Photocatalytic Degradation of Oxytetracycline Based on a Spiral Microchannel Reactor

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