Degradation of indigo carmine by photo-Fenton, Fenton, H2O2/UV-C and direct UV-C: Comparison of pathways, products and kinetics

Ramos, Railson O.; Albuquerque, Maria Virgínia da Conceição; Lopes, Wilton Silva; Sousa, José Tavares de; Leite, Valderí Duarte

doi:10.1016/j.jwpe.2020.101535

Cited by 40 publications

(21 citation statements)

References 47 publications

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“…5, where it is possible to see that, in general, the increase in H 2 O 2 concentration did not change the nal result of TY discoloration; however, there was an increase in the speed of the photo-Fenton reaction as can be seen in the rst 15 min of the process. This can be explained by the greater availability of hydroxyl radicals in the medium that potentiates TY discoloration, indicating that the break of H 2 O 2 through photolysis was completed during this period (Crittenden et al 1999;Ramos et al 2020). However, after this rst moment, the oxidation process stabilizes, this may be related to the excess of H 2 O 2 , which can act as a hydroxyl radical scavenger, forming the hydroperoxyl radical that has less reduction potential than •OH, therefore harming the degradation process (Paterlini and Nogueira 2005).…”

Section: Adsorption Processmentioning

confidence: 99%

Photo-Fenton Oxidative System for Removing Tartrazine Yellow Dye in Aqueous Medium Using Y-fe Zeolite As Catalyst

Nippes

Macruz

Molina

et al. 2021

Preprint

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The synthesis and application of heterogeneous solid catalysts in Fenton-type processes have been shown to be a promising alternative for the removal of hazardous pollutants. In this context, the aim of this study was to prepare and characterize a heterogeneous solid iron catalyst supported on zeolite Y for the degradation of yellow food coloring tartrazine (TY). The catalyst was produced through humid ion exchange and characterized by the physisorption of N2, XRD, SEM, TEM and EDX. The efficiency of the catalyst was evaluated through the degradation of tartrazine yellow dye in a batch regime, and the influence of some of the main operational parameters was also evaluated. The characterizations confirmed the presence of iron on the surface of zeolite Y and the increase in the specific area and pore volume after ion exchange. The catalyst used in the photo-Fenton system was extremely efficient, with a removal of approximately 98% in 120 min in the experimental conditions: [TY]0 = 10 mg/L, [H2O2]0 =200 g/L, Y-Fe dosage=1.5 g/L and pH= 3.0. It was possible to recover the catalyst and use it in five reuse cycles, showing its stability and potential application of this catalyst in heterogeneous photo-Fenton systems.

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Section: Adsorption Processmentioning

confidence: 99%

Photo-Fenton Oxidative System for Removing Tartrazine Yellow Dye in Aqueous Medium Using Y-fe Zeolite As Catalyst

Nippes

Macruz

Molina

et al. 2021

Preprint

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“…The processes used for textile dyeing require high water consumption, and therefore the generation of wastewater (Paździor, Bilińska and Ledakowicz, 2019 ), so the removal of contaminants is necessary. Biological, physicochemical, and advanced oxidation process (AOP) treatments are generally evaluated in the removal of dyes and other pollutants in real or synthetic wastewaters (Legerská et al 2016 ; Sivakami et al 2018 ; Ramos et al 2020 ). The color removal efficiencies of biological processes were as high as 100% in synthetic wastewater (Paz et al 2017 ), and these efficiencies were lower in textile wastewater (78.4%) (Shoukat, Khan and Jamal, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

A critical review of textile industry wastewater: green technologies for the removal of indigo dyes

Castillo-Suárez

Sierra-Sánchez²,

Linares-Hernández³

et al. 2023

Int. J. Environ. Sci. Technol.

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The denim textile industry represents an important productive sector. It generates wastewater with low biodegradability due to the presence of persistent pollutants, which can produce toxic and carcinogenic compounds; therefore, wastewater treatment reduces risks to aquatic life and public health. This paper presents a review of 172 papers regarding textile industry wastewater treatment for the removal of contaminants, especially indigo dyes used in the denim industry, in the context of green technologies. The physicochemical characteristics of textile wastewater, its environmental and health impacts, and the permissible limit regulations in different countries were reviewed. Biological, physicochemical and advanced oxidation processes for the removal of indigo dyes were reviewed. The goal of this study was to analyze the characteristics of green technologies; however, the research does not clearly demonstrate an effect on energy consumption savings, carbon footprint decreases, and/or waste generation. Advanced oxidation processes showed the highest color removal efficiency (95 and 97% in synthetic or real wastewater, respectively). Photocatalysis and Fenton reactions were the most efficient processes. None of the revised works presented results regarding upscaling for industrial application, and the results should be discussed in terms of the guidelines and maximum permissible limits established by international legislation. New technologies need to be developed and evaluated in a sustainable context with real wastewater.

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“…To overcome this limitation, many technologies have been proposed, such as the combination of the anodic oxidation with photolysis [27][28][29][30][31][32], sonolysis [33][34][35][36], the promotion in the production of oxidants, such as persulfates and hydrogen peroxide [37][38][39][40][41], and the combination of processes [42][43][44][45][46]. One of them, consists of the concentration of the pollutant by a granular activated carbon adsorption-desorption stage [47,48], that is, to retain the organics into activated carbon (removing pollutants from water) and then, to release these organics into methanol (because of the more unfavorable isotherm in this media).…”

Section: Introductionmentioning

confidence: 99%

Production of value-added substances from the electrochemical oxidation of volatile organic compounds in methanol medium

Mello

Arias

Motheo

et al. 2022

Chemical Engineering Journal

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Degradation of indigo carmine by photo-Fenton, Fenton, H2O2/UV-C and direct UV-C: Comparison of pathways, products and kinetics

Cited by 40 publications

References 47 publications

Photo-Fenton Oxidative System for Removing Tartrazine Yellow Dye in Aqueous Medium Using Y-fe Zeolite As Catalyst

Photo-Fenton Oxidative System for Removing Tartrazine Yellow Dye in Aqueous Medium Using Y-fe Zeolite As Catalyst

A critical review of textile industry wastewater: green technologies for the removal of indigo dyes

Production of value-added substances from the electrochemical oxidation of volatile organic compounds in methanol medium

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