Modelling and experimental checking of the influence of substrate concentration on the first order kinetic constant in photo-processes

Gómez, M.; Murcia, M.D.; Gómez, E.; Ortega, S.; Sánchez, Arturo; Thaikovskaya, O.; Briantceva, N.

doi:10.1016/j.jenvman.2016.09.033

Cited by 14 publications

(6 citation statements)

References 31 publications

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“…The equilibrium time was chosen from preliminary tests and the dye concentration, according to the literature (MESQUITA et al, 2016;REDDY et al, 2013;ZHOU et al, 2015). The H2O2 concentration was calculated according to reaction stoichiometry (GÓMEZ et al, 2016), since at this way, the total conversion of MB to CO2 and H2O can occur.…”

Section: Experimental Designmentioning

confidence: 99%

Decolorization and degradation of methylene blue by photo-Fenton reaction under visible light using an iron-rich clay as catalyst: CCD-RSM design and LC-MS technique

Zimmermann

Peres

Dotto

et al. 2022

REGET

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In this work, an iron-rich bentonite was thermally modified at 200 oC and posteriorly used as a heterogeneous catalyst in the decolorization and degradation of methylene blue dye (MB) by photo-Fenton reaction under visible irradiation. The variables such as catalyst concentration and pH were investigated in the reaction system to detect the optimal decolorization conditions using the response surface methodology (RSM) coupled with Central Composite Design (CCD). Photodegradation of MB was analyzed by LC-MS technique. The results indicated that the optimal conditions to obtain 94% of MB decolorization efficiency were pH = 2.4 and catalyst mass = 0.02 g. It was also possible to verify that the simultaneous combination of catalyst, hydrogen peroxide and visible light in the reaction medium was primordial for the increasing MB decolorization efficiency. MB degradation occurred partially at 180 min of photo-Fenton reaction, since the presence of dye in the solution was reduced, leading to its transformation into different intermediate products. Therefore, the catalyst used in this work has demonstrated a great potential for the degradation of cationic dye, allowing its use in advanced oxidation processes

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Section: Experimental Designmentioning

confidence: 99%

Decolorization and degradation of methylene blue by photo-Fenton reaction under visible light using an iron-rich clay as catalyst: CCD-RSM design and LC-MS technique

Zimmermann

Peres

Dotto

et al. 2022

REGET

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“…The XeBr excilamp has a maximum emission wavelength of about 283 nm with an average emission power of 17.12 mW/cm 2 [12]. Experiments with the KrCl excilamp were carried out using flow [7] and stationary [13] reactors. Experiments with XeBr and KrCl+XeBr excilamps were carried out using a stationary reactor.…”

Section: Uv Irradiation and Techniquementioning

confidence: 99%

“…Wastewater containing emissions from textile production poses an environmental hazard due to the refractory carcinogenic nature of dyes. Crystal Violet (CV) is a typical representative of the triphenylmethane dye, is toxic to living organisms, and is a mutagenic and mitotic poison [7]. On the other hand, the dye molecule is of scientific interest in the field of nonlinear properties.…”

Section: Introductionmentioning

confidence: 99%

Luminescence of dye after exposure to electron beam radiation

Bocharnikova¹,

Tchaikovskaya²,

Mayer³

et al. 2022

8th International Congress on Energy Fluxes and Radiation Effects

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The article presents the results of measuring the luminescence of ambient air and a solution of an organic compound, when they are irradiated with a high-current pulsed electron beam with an average energy of Ee = 170 keV and a duration of 2 ns, formed by the RADAN-303 accelerator. It has been shown that under the action of UV radiation, the transformation of the Crystal Violet dye is only 2%. The addition of hydrogen peroxide leads to an increase in the phototransformation of the dye. The action of an electron beam on an aqueous dye solution is accompanied by a decrease in the intensity of air luminescence bands with an increase in the number of irradiation pulses. The results showed the degradation of both the dye itself and its transformation products under the action of an electron beam.

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“…The experimental data were fitted to the one phase decay kinetic model developed by Gomez et al [27], which considers the effect of the initial concentration of substrate in photoprocesses and defines a limit concentration as the final concentration of dye that remains after the photodegradation process.…”

Section: Reaction Kineticsmentioning

confidence: 99%

“…Excilamps have been reported previously for the degradation of dyes in water by UV and UV/H 2 O 2 processes [20][21][22][23][24][25][26][27][28]. Some of these studies compared the decolourization efficiency of different excilamps (KrCl, Xe 2 , XeBr and Cl 2 ) [20,21,25,26].…”

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confidence: 99%

KrCl and XeCl excilamps and LP-Hg lamp for UV and UV/H₂O₂decolourization of dyes in water

Aristizábal

Perilla

Lara-Borrero

et al. 2018

Environmental Technology

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In the present study, the decolourization efficiencies of LP-Hg lamp, XeCl and KrCl excilamps at the same power density were compared for the decolourization of dyes in water by UV and UV/HO processes in a batch reactor. Laboratory prototypes of XeCl and KrCl excilamps and a commercial LP-Hg lamp were studied as UV sources. Methylene Blue and Eliamine Blue dyes were used as model pollutants. The effect of the initial concentrations of dye and HO in the TOC removal and kinetic parameters were also studied. The ratio of dye decolourization to the electric power consumption of the KrCl excilamp and LP-Hg lamp for the decolourization of Methylene Blue and Eliamine Blue were evaluated. As a result, the KrCl excilamp showed significantly higher decolourization efficiencies than LP-Hg lamp and XeCl excilamp, but the dye removal rate was significantly slower for Methylene Blue than for Eliamine Blue with this lamp. The KrCl lamp can be an alternative to conventional LP-Hg lamp for the decolourization of dyes by photodegradation, but it depends on the type of dye treated. The addition of HO in a concentration between 0.05 and 0.09%v/v increases significantly the efficiency of the decolourization of Methylene Blue, and further increase does not lead to a higher increase in conversion. The experimental data were fitted to the one phase decay kinetic model with good agreement and the kinetic parameters were reported.

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Modelling and experimental checking of the influence of substrate concentration on the first order kinetic constant in photo-processes

Cited by 14 publications

References 31 publications

Decolorization and degradation of methylene blue by photo-Fenton reaction under visible light using an iron-rich clay as catalyst: CCD-RSM design and LC-MS technique

Decolorization and degradation of methylene blue by photo-Fenton reaction under visible light using an iron-rich clay as catalyst: CCD-RSM design and LC-MS technique

Luminescence of dye after exposure to electron beam radiation

KrCl and XeCl excilamps and LP-Hg lamp for UV and UV/H₂O₂decolourization of dyes in water

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Modelling and experimental checking of the influence of substrate concentration on the first order kinetic constant in photo-processes

Cited by 14 publications

References 31 publications

Decolorization and degradation of methylene blue by photo-Fenton reaction under visible light using an iron-rich clay as catalyst: CCD-RSM design and LC-MS technique

Decolorization and degradation of methylene blue by photo-Fenton reaction under visible light using an iron-rich clay as catalyst: CCD-RSM design and LC-MS technique

Luminescence of dye after exposure to electron beam radiation

KrCl and XeCl excilamps and LP-Hg lamp for UV and UV/H2O2decolourization of dyes in water

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Product

Resources

About

KrCl and XeCl excilamps and LP-Hg lamp for UV and UV/H₂O₂decolourization of dyes in water