Solar Photocatalytic Oxidation of Triclosan with TiO2 Immobilized on Volcanic Porous Stones on a CPC Pilot Scale Reactor

Martínez, S.; Morales-Mejía, Julio C.; Hernández, Perla; Santiago, Lauro; Almanza, Rafael

doi:10.1016/j.egypro.2014.10.337

Cited by 14 publications

(6 citation statements)

References 9 publications

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“…There are very few studies where development of prototype reactor is reported for actual treatment of wastewater. [ 26,27 ] Our developed reactor is highly efficient compared to earlier reported due to its low cost, easy operation under visible light, and ability to degrade emerging pollutants under continuous operation.…”

Section: Resultsmentioning

confidence: 99%

“…[ 24,25 ] There are very few studies where development of prototype reactor is reported for actual decontamination of wastewater. [ 26,27 ] Tayade et al developed photocatalytic reactor using TiO 2 for potential removal of industrial dyes under UV light illumination. [ 28 ] Sand‐coated TiO 2 was used in reactor by Ramadan et al for photocatalytic degradation of phenol under UV light.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Defect State Modulation of TiO₂ Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Kar

Aggarwal

Shukla

et al. 2021

Adv Energy and Sustain Res

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Rapid industrialization has resulted in a significant presence of pharmaceutical compounds in aqueous effluents, and therefore, effluents must be effectively treated before discharging them to water bodies. The removal of emerging pharmaceutical pollutants in wastewater using TiO2 via photocatalysis technique is limited because of its wide bandgap (≈3.2 eV). Herein, defect state modulation of TiO2 for degradation of pharmaceutical pollutant “antipyrine” under visible light irradiation is investigated. A simple hydrothermal technique for synthesis of TiO2 microspheres (average diameter ≈2.94 μm), followed by chemical reduction method for formation of defective‐TiO2 microspheres using NaBH4 under an inert atmosphere for different durations (3, 5, and 8 h) is used. Defective‐TiO2 microspheres are utilized for photocatalytic degradation of antipyrine under visible light illumination. Improved photocatalytic activity for the defective‐TiO2 samples is observed due to a reduction in bandgap as well as incorporation of Ti3+, acting as a trap site and resulting in reduced electron‐hole recombination. For practical application, a continuous prototype reactor comprising defective‐TiO2 particles immobilized over glass beads is developed and efficient photocatalytic degradation of antipyrine under continuous operation is observed. Excellent recyclability and efficient photocatalytic degradation indicate a promising future for the developed defective‐TiO2 particles toward real‐world wastewater treatment applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Defect State Modulation of TiO₂ Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Kar

Aggarwal

Shukla

et al. 2021

Adv Energy and Sustain Res

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“…A CPC pilot-scale packed bed reactor made up of 5 Pyrex tubes (1.9 m length and 22.2 mm outer diameter) joined successively was employed for handling 21 L of triclosan solution over supported TiO 2 on volcanic mesoporous stones (Martıńez et al, 2014). Finally, Silva et al propose and tested a new approach for the remediation of landfill leachates following an aerobic treatment on a pilot scale (Silva et al, 2017).…”

Section: Compound Parabolic Concentratormentioning

confidence: 99%

Recent Advances in Photocatalytic Removal of Microplastics: Mechanisms, Kinetic Degradation, and Reactor Design

Hamd

Daher

Tofa³

et al. 2022

Front. Mar. Sci.

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Plastic products are used in almost all aspects of our daily life. Due to their low cost, portability, durability, and resistance to degradation, these products are affecting the health of the environment and biota on a global scale. Thus, the removal and mineralization of microplastics is an important challenge in the 21st century. Advanced oxidation processes (AOPs) have recently been identified as a viable treatment technique for tackling recalcitrant organic molecules and polymers. However, information on kinetic degradation mechanisms and photocatalytic reactor design is insufficient. This review discusses the fundamentals of photocatalysis and photo-Fenton processes in addition to the photocatalytic degradation mechanisms. We also introduce different characterization techniques of the major microplastic pollutants such as PE, PP, PVC, PS, PMMA, and PA66. In addition, a detailed overview of the major existing photocatalytic plants and the scaling-up methods of photoreactors are discussed.

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“…Immobilizing TiO 2 nanoparticles on suitable support can fix the issues and increase the application possibilities [64–68] . As substrates, various materials have been used, including glass, quartz, activated carbon, zeolite, ceramics, stainless steel, [69–71] paints, [72–74] cellulose, [75] glass, ceramics, [76,77] silica gel, [78] clays, [79] graphene, [80] carbon nanotubes, perlite granules, [81] black sand, [82] and volcanic porous stones [83] …”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Epoxy Paint Based on TiO₂ for the Decontamination of Water under Visible LED and Sunlight Irradiation

Chawraba,

Medlej,

Noun

et al. 2024

ChemistrySelect

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Semiconductor oxides such as titanium dioxide (TiO2) have been used as photocatalysts for removing contaminants. In addition, TiO2 nanoparticles in suspension form are difficult to recover and recycle, and they are expensive. In our work, titanium dioxide has been immobilized on a commercially available, thermally stable, chemically stable, and cheap polymer. The nanocomposite is synthesized with varying percentages of TiO2, 0.25, 0.5, and 1 weight percent. The obtained nanocomposites were characterized, and the effect of the process parameter (i. e., initial concentration of MB, amount of catalyst, light wavelength, and power of light) was investigated. Also, the results show good photodegradation of MB by the TiO2‐epoxy nanocomposite. The decomposition of 10 ppm methylene blue (MB) during 200 min under 25 W visible LED irradiation can reach 95 %. This value is higher than that obtained with pristine TiO2, which does not have photocatalytic activity under LED light. The antibacterial activity of nanocomposites concerning Escherichia coli and Stephalocous aureus was studied, and an inhibition zone of 2 cm and 3.5 cm was obtained, respectively. Therefore, the TiO2‐epoxy nanocomposite was applied to a glass jar and tested after four months for the degradation of methylene blue (5 ppm) and methyl orange (8 ppm) under sunlight. The paint demonstrated good photocatalytic efficiency of 41 % and 72 % within 310 min, respectively.

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Solar Photocatalytic Oxidation of Triclosan with TiO2 Immobilized on Volcanic Porous Stones on a CPC Pilot Scale Reactor

Cited by 14 publications

References 9 publications

Defect State Modulation of TiO₂ Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Defect State Modulation of TiO₂ Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Recent Advances in Photocatalytic Removal of Microplastics: Mechanisms, Kinetic Degradation, and Reactor Design

Photocatalytic Epoxy Paint Based on TiO₂ for the Decontamination of Water under Visible LED and Sunlight Irradiation

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Solar Photocatalytic Oxidation of Triclosan with TiO2 Immobilized on Volcanic Porous Stones on a CPC Pilot Scale Reactor

Cited by 14 publications

References 9 publications

Defect State Modulation of TiO2 Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Defect State Modulation of TiO2 Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Recent Advances in Photocatalytic Removal of Microplastics: Mechanisms, Kinetic Degradation, and Reactor Design

Photocatalytic Epoxy Paint Based on TiO2 for the Decontamination of Water under Visible LED and Sunlight Irradiation

Contact Info

Product

Resources

About

Defect State Modulation of TiO₂ Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Defect State Modulation of TiO₂ Nanostructures for Photocatalytic Abatement of Emerging Pharmaceutical Pollutant in Wastewater Effluent

Photocatalytic Epoxy Paint Based on TiO₂ for the Decontamination of Water under Visible LED and Sunlight Irradiation