Degradation of Sucralose by Peroxidation Assisted with Ultraviolet Radiation and Photo-Fenton

Ferreira, Gabriela F.; Maniero, Milena Guedes; Guimarães, José Roberto

doi:10.7763/ijet.2015.v7.833

Cited by 6 publications

(1 citation statement)

References 17 publications

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“…It should be highlighted that the photocatalytic treatment of ASs, such as saccharin, acesulfame and sucralose, has only recently started to be studied [3,12,13,20]. To the best of our knowledge, only Chen et al (2014) deal with the photocatalytic degradation of SAC [21].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic treatment of saccharin and bisphenol-A in the presence of TiO 2 nanocomposites tuned by Sn(IV)

et al. 2017

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This study deals with the photocatalytic treatment of saccharin (SAC) and bisphenol-A (BPA) under UV irradiation. For this purpose, novel submicronic anatase-rutile nanocomposite particles with tuned phase ratio produced by thermohydrolysis of acidic Ti(IV) solutions in the presence of controlled amounts of Sn(IV) were used. These catalysts were then assessed regarding their efficiency to degrade SAC or BPA, which are contaminants of increased environmental and health concern. The effect of various operating conditions, such as the anatase-rutile ratio (100:0, 85:15, 70:30), catalyst concentration (50-600 mg/L) and solute concentration (3-10 mg/L) was investigated. Furthermore, catalyst reuse-an important but little studied aspect-was assessed. Anatase-rutile nanocomposites were successfully prepared presenting good crystallinity and surface quality. Their activity was about the same for removing SAC or BPA from water. It was found that photocatalytic performance was increased with catalyst loading up to 400 mg/L. A further increase to 600 mg/L did not significantly enhance BPA removal, thus associating this tendency with screening effects. Also, photocatalytic efficiency was increased with initial solute concentration decrease. Organics degradation followed a pseudo-first order kinetic rate in terms of both SAC and BPA removal. The reproducibility of catalyst activity was assessed in three successive reuse cycles, where the removal percentage of initially 5 mg/L SAC was maintained as high as 70% at the end of the 3 rd cycle, in the presence of initially 400 mg/L anatase catalyst, and after 90 min of treatment. Finally, additional experimental runs were carried out with ultrasound cleaning (US) being applied to the reactant mixture at the beginning of each reuse cycle, but it was found to have no significant effect on treatment efficiency.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic treatment of saccharin and bisphenol-A in the presence of TiO 2 nanocomposites tuned by Sn(IV)

et al. 2017

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Photocatalytic Degradation of Chlorophenols and Antibiotics from Wastewater

Orbeci

Bobiricǎ

2020

Water Pollution and Remediation: Photocatalysis

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Advanced oxidation processes on doxycycline degradation: monitoring of antimicrobial activity and toxicity

Spina-Cruz

Maniero

Guimarães

2018

Environ Sci Pollut Res

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Advanced oxidation processes (AOPs) have been highly efficient in degrading contaminants of emerging concern (CEC). This study investigated the efficiency of photolysis, peroxidation, photoperoxidation, and ozonation at different pH values to degrade doxycycline (DC) in three aqueous matrices: fountain, tap, and ultrapure water. More than 99.6% of DC degradation resulted from the UV/HO and ozonation processes. Also, to evaluate the toxicity of the original solution and throughout the degradation time, antimicrobial activity tests were conducted using Gram-positive (Bacillus subtilis) and Gram-negative (Escherichia coli) bacteria, and acute toxicity test using the bioluminescent marine bacterium (Vibrio fischeri). Antimicrobial activity reduced as the drug degradation increased in UV/HO and ozonation processes, wherein the first process only 6 min was required to reduce 100% of both bacteria activity. In ozonation, 27.7 mg L of ozone was responsible for reducing 100% of the antimicrobial activity. When applied the photoperoxidation process, an increase in the toxicity occurred as the high levels of degradation were achieved; it means that toxic intermediates were formed. The ozonated solutions did not present toxicity.

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Degradation of Sucralose by Peroxidation Assisted with Ultraviolet Radiation and Photo-Fenton

Cited by 6 publications

References 17 publications

Photocatalytic treatment of saccharin and bisphenol-A in the presence of TiO 2 nanocomposites tuned by Sn(IV)

Photocatalytic treatment of saccharin and bisphenol-A in the presence of TiO 2 nanocomposites tuned by Sn(IV)

Photocatalytic Degradation of Chlorophenols and Antibiotics from Wastewater

Advanced oxidation processes on doxycycline degradation: monitoring of antimicrobial activity and toxicity

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