Gamma radiolysis of erythrosine dye in aqueous solutions

Zaouak, Amira; Noomen, Ahlem; Jelassi, Haikel

doi:10.1007/s10967-019-06671-x

Cited by 11 publications

(1 citation statement)

References 28 publications

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“…HCQ is deriving from the 4-aminoquinolines class, chemically named 2-[{4-[(7-chloroquinolin-4-yl) amino] pentyl} (ethyl) amino] ethanol was supplied by Sanofi (Tunisia). Its empirical formula is C 19 H 28 ClN 3 with molecular weight of 333.89 g mol −1 (Lee et al 2011 ; Zaouak et al 2019 ). The structural formula is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Zaouak

Jebali

Chouchane

et al. 2022

Int. J. Environ. Sci. Technol.

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In this work, the effect of gamma irradiation emitted by Cobalt 60 source has been investigated for the degradation of hydroxychloroquine (HCQ). The monitoring of the gamma irradiation treatment of HCQ aqueous solutions was followed by UV–visible, chemical oxygen demand, total organic carbon (TOC) and LC/MS analyses. Effects of several important parameters such as concentration, dose rate and pH on the degradation efficiency were studied then evaluated. Achieved results showed that % TOC removal efficiency of 98.5 was obtained after 8 kGy absorbed dose which warrants HCQ mineralization. The process was found to be more efficient when the initial pollutant concentration was low, with higher dose rate and at neutral pH. Furthermore, HCQ degradation kinetic study revealed a pseudo-first-order kinetic. Additionally, based on by-products identified by LC/MS, a degradation mechanistic schema mediated through hydroxyl radicals generated by water radiolysis has been proposed. Finally, in order to check the potential industrial application viability the energy consuming was evaluated.

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Section: Methodsmentioning

confidence: 99%

Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Zaouak

Jebali

Chouchane

et al. 2022

Int. J. Environ. Sci. Technol.

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Response surface methodology for low-energy consumption electro-Fenton process for xanthene dye electrochemical degradation

Kacem,

Clematis,

Elaoud

et al. 2024

J Appl Electrochem

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Erythrosine B (EB) is a dye widely used in the food and textile industries. Despite many studies that have been proposed in the literature about the electrochemical oxidation of dyes, few studies considered such recalcitrant xanthene compound, although it has been recognized as a threat to health and the environment. Then, this study investigates the oxidation of EB by a homogeneous electro-Fenton process using iron (II) sulfate heptahydrate as a catalyst, carbon felt cathode, and Ti/RuO2 anode. The treated synthetic wastewater contains 100 mg L−1 of EB and has a pH = 3. The effects of three independent variables have been considered for process optimization, such as applied current intensity (0.1–0.5 A), iron concentration (1–10 mM), and stirring rate (100–1000 rpm). Their interactions were investigated considering response surface methodology (RSM) based on Doehlert design as optimization method. EB removal efficiency and energy consumption were considered as model responses after 30 min of electrolysis. Analysis of variance (ANOVA) revealed that the quadratic model was adequately fitted to the experimental data with R2 (0.9819), adj-R2 (0.9276), and low Fisher probability (< 0.0181) for the EB removal model, and R2 (0.9968), adj-R2 (0.9872) and low Fisher probability (< 0.0014) relative to the energy consumption model, suggesting a robust statistical significance. The energy consumption model significantly depends on current density, as expected. The foregoing results obtained by RSM led to the following optimal conditions for EB degradation: current intensity of 0.2 A, iron concentration of 9.397 mM, and stirring rate of 500 rpm, which gave a maximum decolorization rate of 98.15% with a minimum energy consumption of 0.74 kWh m−3 after 30 min of electrolysis. The competitiveness of the electro-Fenton process has been confirmed by the literature analysis proposed as well as by the preliminary economic analysis proposed in the second section of the study. Graphical abstract

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Gamma radiation induced degradation of the phenoxy acid herbicide diclofop-methyl in aqueous solutions

Zaouak

Noomen

Jelassi

2020

Applied Radiation and Isotopes

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Gamma radiolysis of erythrosine dye in aqueous solutions

Cited by 11 publications

References 28 publications

Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Impact of gamma-irradiation on the degradation and mineralization of hydroxychloroquine aqueous solutions

Response surface methodology for low-energy consumption electro-Fenton process for xanthene dye electrochemical degradation

Gamma radiation induced degradation of the phenoxy acid herbicide diclofop-methyl in aqueous solutions

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