TiO 2 photocatalysis applied to the degradation and antimicrobial activity removal of oxacillin: Evaluation of matrix components, experimental parameters, degradation pathways and identification of organics by-products

Giraldo-Aguirre, Ana L.; Erazo-Erazo, Edgar D.; Flórez-Acosta, Oscar A.; Serna-Galvis, Efraím A.; Torres-Palma, Ricardo A.

doi:10.1016/j.jphotochem.2015.06.021

Cited by 44 publications

(14 citation statements)

References 35 publications

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“…The electrochemical process promotes the oxacillin isomerization pathway, while the photo-Fenton and TiO 2 photocatalysis treatments showed hydroxylation at the aromatic ring. The different degradation routes generated different mineralization extent and efficiency [19]. P + ˙OH → Pox (9) HClO, CLO − , Cl 2 + P → Pox (10)…”

Section: Antibiotic Photodecompositionmentioning

confidence: 99%

“…The presence of the ultrasonic waves in aqueous solutions is another way to form hydroxyl radicals [Eqs. (16)- (19)]. Singular conditions of temperature (5000 K) and pressure (1000 atm) induce the formation of ultrasonic microbubbles which violently collapse in water, and the dissolved oxygen is dissociated to produce hydroxyl radicals.…”

Section: Antibiotic Photodecompositionmentioning

confidence: 99%

“…O 2 + ˙H → ˙O + ˙OH (19) The reaction of Fe (II) with hydrogen peroxide produces radicals. The reduction of Fe (III) in aqueous media results in Fe (II) by the action of UV-Vis light and extra hydroxyl radicals in a photo-Fenton process.…”

Section: Antibiotic Photodecompositionmentioning

confidence: 99%

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Green Water Treatment for Pharmaceutical Pollution

Ortiz¹

2019

Green Chemistry [Working Title]

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Environmental sustainability demands the advancement in water treatment and the use of lighting natural resources. Brazil has one of the most stable and intense solar irradiation in the world. It has to be used not only for energy generation purposes but also and mostly for water treatment, water quality polishment, and furthermore water disinfection. The chapter performs a comparison of different green technologies for water treatment as natural solar irradiation, simulated solar photolysis, solar photo-Fenton with and without hydrogen peroxide addition (solar/ Fe), solar photo-Fenton with and without peroxide (solar/Fe/H 2 O 2), titanium oxide-mediated photocatalysis (UV/TiO 2), photolysis under UV irradiation, and UV treatment with hydrogen peroxide (UV/H 2 O 2). The chapter describes the solar photodecomposition calculations for pharmaceuticals and the emerging pollutants mostly found in polluted waters, including the decomposition route, kinetics, and process parameters. Many published works to point out the important properties to evaluate catalyzer and semiconductor materials after their use in photodecomposition processes. The essay includes the solar photodecomposition of dyes, carbamazepine, hormones, acetaminophen, antipyrine, bisphenol A, antibiotics, and the photodecomposition by-products. Finally, the chapter presents the synergistic effect between them with the probable mechanism and mineralization degree.

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Section: Antibiotic Photodecompositionmentioning

confidence: 99%

Section: Antibiotic Photodecompositionmentioning

confidence: 99%

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Green Water Treatment for Pharmaceutical Pollution

Ortiz¹

2019

Green Chemistry [Working Title]

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“…La adsorción de la FLX sobre el catalizador es nula durante dos horas, ya que la FLX presenta un pKa = 8.7 (Zhao et al, 2017) y si se considera que el pH de trabajo siempre fue el natural (cercano a 6), la superficie del catalizador permaneció en forma catiónica al igual que la especiación de la FLX, por tal razón no se evidencia adsorción del contaminante en la superficie del catalizador. Cuando se adiciona KI que es un scavenger de h + en la superficie, la degradación de FLX alcanzo el 49%, ésta respuesta implica que hay un aporte de los huecos (h + , foto Kolve) a la degradación de FLX (Giraldo-Aguirre et al, 2015). El anterior comportamiento unido a la respuesta de la degradación cuando hay acetonitrilo que es un scavenger de radicales, donde la degradación alcanzó un 46.7%, confirma que la degradación de la FLX se degrada vía foto-Kolbe y radicalaria al mismo tiempo.…”

Section: Degradación De La Flx Por Fotocatálisis Heterogénea Con Tio unclassified

Eliminación de fluoxetina presente en aguas contaminadas usando procesos fotoquímicos de oxidación avanzada y luz solar

Losada

Ñañez

Torres-Palma

2019

reveia

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Se estudió comparativamente la degradación de la fluoxetina por medio de tres procesos fotoquímicos de oxidación avanzada: foto Fenton (FFS), foto electro Fenton (FEFS) y fotocatálisis con TiO2 (FCS), mediados por radiación solar. Los experimentos se desarrollaron con soluciones de 100 mL en un vaso de reacción y para el caso de FEFS, se equipó el reactor con un ánodo de IrO2/RuO2 y un cátodo de grafito de difusión de aire para producción continua de peróxido. En todos los casos se hizo seguimiento de la degradación, la mineralización de la fluoxetina y la toxicidad. El proceso FFS presentó la mayor velocidad de degradación y mineralización, así como las mayores eficiencias en la degradación y mineralización. El pH en el proceso FFS definió el alcance de la mineralización, evidenciando que a pH ácido se logra mayor mineralización pues se evita la formación de complejos e hidróxidos típicos de un pH mayor. El proceso FCS presenta alta eficiencia, pero cinéticas lentas. La toxicidad ante levadura de cerveza disminuye a medida que se generan subproductos de degradación en todos los procesos evaluados.

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“…The presence of pharmaceutical residues in wastewaters, and thus investigations of efficient methods for water decontamination, has been widely reported (Bethi et al, ; Oros‐ruiz et al, ). Heterogeneous TiO 2 photocatalysis has obtained an important circumstance among the other technologies for antibiotic degradation (Giraldo‐aguirre, Erazo‐erazo, Flórez‐acosta, Serna‐galvis, & Torres‐palma, ). Tetracycline is a common antibiotic that is used for treating different infections in human and veterinary medicine.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic treatment of tetracycline antibiotic wastewater by silver/TiO₂ nanosheets/reduced graphene oxide and artificial neural network modeling

Tabatabai‐Yazdi

Pirbazari

Saraei

et al. 2019

Water Environment Research

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In this work, we focused on facile preparation of ternary nanocomposites containing TiO 2 nanosheets, reduced graphene oxide, and different quantities of silver for photocatalytic treatment of tetracycline (TC) antibiotic wastewater. Plasmonic silver nanoparticles were deposited on TiO 2 nanosheets/reduced graphene oxide nanocomposite via a photodeposition method (TGA(x) samples). The as-obtained samples were identified by variety of techniques such as XRD, UV-Vis DRS, FESEM/ EDX, TEM, and Raman spectroscopy. The photocatalytic degradation experiments of TC (in concentration of 30 mg/L) were carried out by synthesized nanocomposites, and the degradation efficiency of TGA (0.076) (the optimal sample) was evaluated as 52.56% after 3 hr of irradiation under visible light. The obtained results showed that in TGA(x) samples, the reduced graphene oxide acts as a bridge for transferring photoinduced electrons from plasmonic silver nanoparticles to TiO 2 nanosheetes. A three-layered artificial neural network model with four input variables (irradiation time, catalyst dosage, initial concentration of TC, and silver nitrate content) and one output variable (% degradation) was optimized with 11 hidden neurons. The relative importance of the independent variables was calculated using Garson formula and the initial concentration of TC was found as the most influencing parameter (relative importance of 31%) on the treatment efficiency. © 2019 Water Environment Federation • Practitioner points• TiO 2 nanosheets synthesized on the reduced graphene oxide by hydrothermal method. • Plasmonic silver nanoparticles deposited on TNs/rGO by photodeposition method • The photocatalytic degradation of tetracycline (TC) was modeled by artificial neural network.

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TiO 2 photocatalysis applied to the degradation and antimicrobial activity removal of oxacillin: Evaluation of matrix components, experimental parameters, degradation pathways and identification of organics by-products

Cited by 44 publications

References 35 publications

Green Water Treatment for Pharmaceutical Pollution

Green Water Treatment for Pharmaceutical Pollution

Eliminación de fluoxetina presente en aguas contaminadas usando procesos fotoquímicos de oxidación avanzada y luz solar

Photocatalytic treatment of tetracycline antibiotic wastewater by silver/TiO₂ nanosheets/reduced graphene oxide and artificial neural network modeling

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TiO 2 photocatalysis applied to the degradation and antimicrobial activity removal of oxacillin: Evaluation of matrix components, experimental parameters, degradation pathways and identification of organics by-products

Cited by 44 publications

References 35 publications

Green Water Treatment for Pharmaceutical Pollution

Green Water Treatment for Pharmaceutical Pollution

Eliminación de fluoxetina presente en aguas contaminadas usando procesos fotoquímicos de oxidación avanzada y luz solar

Photocatalytic treatment of tetracycline antibiotic wastewater by silver/TiO2 nanosheets/reduced graphene oxide and artificial neural network modeling

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Photocatalytic treatment of tetracycline antibiotic wastewater by silver/TiO₂ nanosheets/reduced graphene oxide and artificial neural network modeling