Process Comparison for Caffeine Degradation: Fenton, Photo-Fenton, UV/H2O2 and UV/Fe3+

Almeida, Lariana Negrão Beraldo de; Josué, Tatiana Gulminie; Fidelis, Michel Zampieri; Abreu, Eduardo; Bechlin, Marcos André; Santos, Onélia Aparecida Andreo dos; Lenzi, Giane Gonçalves

doi:10.1007/s11270-021-05115-1

Cited by 7 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Advanced oxidation processes (AOPs) are used to oxidize macromolecular refractory organics into environmentally friendly small molecules by generating free radicals with strong oxidizing properties through electricity, ultraviolet light, and ultrasound Peng et al, 2019;Shao et al, 2020). AOPs, such as the Fenton reaction which involves reacting Fe 2+ with H 2 O 2 to produce hydroxyl radical (HO • ), have a strong oxidation capacity, a fast reaction rate, high mineralization potential, and simple operation (Almeida et al, 2021;Gorozabel-Mendoza et al, 2021;Zhao et al, 2020). However, the Fenton system has a high catalyst dosage and low pH after reaction (Jin et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Degradation of methyl orange by the Fenton-like reaction of pyrite-activated hydrogen peroxide forming the Fe(III)/Fe(II) cycle

Wenlong Bi,

Ruojin Du,

Hui Liu

et al. 2024

WSA

View full text Add to dashboard Cite

In this study, the typical azo dye methyl orange (MO) was degraded by pyrite (FeS2) activated by hydrogen peroxide (H2O2). When [MO] = 0.1 mM, [FeS2] = 2.0 g/L and [H2O2] = 22 mM, 96.4% MO was removed in 120 min and the TOC removal rate was higher than 50%. HO• was the primary radical responsible for MO degradation. In addition, the acid condition promoted the degradation of MO in the FeS2/H2O2 system. MO in tap water and river water was not effectively degraded, whereas acidification could weaken the inhibitory effect on the FeS2/H2O2 system to enable the degradation of MO in tap and river water. The OD600 indicated that the solution was environmentally friendly after the reaction, and three degradation pathways of MO were discussed. In summary, Fe(II) could be dissolved from FeS2, which activated H2O2 to generate Fe(III) and HO•. FeS2 could reduce Fe(III) into Fe(II), thus realizing the Fe(III)/(II) cycle and efficiently activating H2O2 to degrade MO.

show abstract

Section: Introductionmentioning

confidence: 99%

Degradation of methyl orange by the Fenton-like reaction of pyrite-activated hydrogen peroxide forming the Fe(III)/Fe(II) cycle

Wenlong Bi,

Ruojin Du,

Hui Liu

et al. 2024

WSA

View full text Add to dashboard Cite

show abstract

“…Homogeneous (Fenton reaction, photoassisted Fenton reaction, H 2 O 2 /UV, O 3 /UV treatment, etc.) and heterogeneous (photocatalysis mediated by semiconductors such as TiO 2 ) advanced oxidation systems have been widely used for a variety of treatments of refractory, toxic, hazardous organic and inorganic pollutants (de Almeida et al, 2021;Deng & Zhao, 2015;Díaz-Rodríguez et al, 2020;Gautam et al, 2019;Giler-Molina et al, 2020;Muruganandham & Swaminathan, 2006;Navia-Mendoza et al, 2021;Peternel et al, 2012;Rubio-Clemente et al, 2015;Santana et al, 2021;Tisa et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Degradation of Blue 1 and Yellow 6 Dyes in Binary Mixture Using Photo-Fenton/Sunlight System: Optimization by Factorial Designs

Gorozabel-Mendoza

Filho

Zambrano-Intriago

et al. 2021

Water Air Soil Pollut

View full text Add to dashboard Cite

groups and reduction of the chemical oxygen demand. The post-treatment samples were tested for toxicity on lettuce Lactuca sativa germination to verify the effect of the advanced oxidation process employed. The most efficient treatment determined in the preliminary study was photo-Fenton assisted by sunlight radiation. Under the best conditions developed and analyzed with the experimental designs, a 99% degradation of the chromophore groups was achieved, and a 98.72% decrease in chemical oxygen demand, in 120 min. The experimental data were well represented by the nonlinear kinetic model proposed by Chan and Chu with values of R 2 > 0.95. The toxicity test results demonstrated a decrease in the root growth of the species Lactuca sativa. The results demonstrate that the photo-Fenton system assisted by sunlight Abstract Effluents from the food industry regularly contain synthetic dyes that cause damage to ecosystems and water bodies. The present work aimed to evaluate homogeneous advanced oxidation processes for the mixed degradation of food dyes blue 1 and yellow 6. Through preliminary studies of advanced oxidation processes by photolysis, UV/H 2 O 2 , Fenton, and photo-Fenton, applying UV-C, artificial solar (sunlight), and natural solar radiation, the system with the best performance for the integral optimization of the treatment was determined. Based on the treatment with the best results, the multilevel factorial design 2 2 × 3 1 and central composite design 2^2 + star were created to optimize the variables [H 2 O 2 ], [Fe], and pH. The kinetics of the process was evaluated based on the percentages of degradation of the chromophore

show abstract

Removal of COD and Color from Textile Wastewater by the Fenton and UV/H2O2 Oxidation Processes and Optimization

Tuncer

Sönmez

2023

Water Air Soil Pollut

View full text Add to dashboard Cite

Process Comparison for Caffeine Degradation: Fenton, Photo-Fenton, UV/H2O2 and UV/Fe3+

Cited by 7 publications

References 22 publications

Degradation of methyl orange by the Fenton-like reaction of pyrite-activated hydrogen peroxide forming the Fe(III)/Fe(II) cycle

Degradation of methyl orange by the Fenton-like reaction of pyrite-activated hydrogen peroxide forming the Fe(III)/Fe(II) cycle

Degradation of Blue 1 and Yellow 6 Dyes in Binary Mixture Using Photo-Fenton/Sunlight System: Optimization by Factorial Designs

Removal of COD and Color from Textile Wastewater by the Fenton and UV/H2O2 Oxidation Processes and Optimization

Contact Info

Product

Resources

About