Determination of cost optimal operating conditions for decoloration and mineralization of C. I. Reactive Blue 268 by UV/H2O2 process

Novak, Nina; Maréchal, Alenka Majcen Le; Bogataj, Miloš

doi:10.1016/j.cej.2009.02.025

Cited by 12 publications

(7 citation statements)

References 21 publications

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“…Artificial neural networks can be used to investigate the influence of parameters on the process without understanding the actual phenomena [10]. To optimize costs or efficiency, response surface methodologies can be used [11,12]. Although these models are relatively easy to build, their value regarding AOP process design is rather limited.…”

Section: Omentioning

confidence: 99%

“…The synthetic organic compound alachlor was used for this purpose [21]. The RSF was calculated from the absolute sensitivity function (ASF) using the finite forward difference method with a perturbation factor of 1x10 -6 (12) . This means that ASFs were calculated by perturbing the default parameter value with an amount equal to the perturbation factor times the default value:…”

Section: Sensitivity Analysismentioning

confidence: 99%

See 1 more Smart Citation

Application of a mechanistic UV/hydrogen peroxide model at full-scale: Sensitivity analysis, calibration and performance evaluation

Audenaert

Vermeersch

Hulle

et al. 2011

Chemical Engineering Journal

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Numerous mechanistic models describing the UV/H 2 O 2 process have been proposed in literature. In this study, one of them was used to predict the behavior of a full-scale reactor. The model was calibrated and validated with nonsynthetic influent using different operational conditions. A local sensitivity analysis was conducted to determine the most important operational and chemical model parameters. Based on the latter, the incident UV irradiation intensity and two kinetic rate constants were selected for mathematical estimation. In order to investigate changes of the NOM content over time, some time delay was considered between calibration and validation data collection. Hydrogen peroxide concentration, the decadic absorption coefficient at 310 nm (UVA 310 , as a surrogate for natural organic matter) and pH could be satisfactorily predicted during model validation using an independent data set. It was demonstrated that quick real-time calibration is an option at less controllable full-scale conditions. The reactivity of UVA 310 towards hydroxyl radicals did not show significant variations over time suggesting no need for frequent recalibration. Parameters that determine the initiation step, i.e. photolysis of hydrogen peroxide, have a large impact on most of the variables. Some reaction rate constants were also of importance, but nine kinetic constants did show absolutely no influence to one of the variables. Parameters related to UV shielding by NOM were of main importance. At the conditions used in this study, i.e. H 2 O 2 concentrations between 0.5 and 4 mM, hydraulic residence times between 90 and 200 s and alkalinity concentrations between 2.5 and 6 mM, competitive radiation absorption by NOM was more detrimental to the micro pollutant removal efficiency than hydroxyl radical scavenging. Hydrogen peroxide concentration was classified as a non-sensitive variable, in contrast to the concentration of a micro pollutant which showed to be very to extremely influential to many of the parameters. UV absorption as a NOM surrogate is a promising variable to be included in future models. Model extension by splitting up the UVA 310

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Section: Omentioning

confidence: 99%

Section: Sensitivity Analysismentioning

confidence: 99%

Application of a mechanistic UV/hydrogen peroxide model at full-scale: Sensitivity analysis, calibration and performance evaluation

Audenaert

Vermeersch

Hulle

et al. 2011

Chemical Engineering Journal

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“…Ante esta problemática, un punto muy importante para ofrecer una tecnología viable es la optimización del proceso H 2 O 2 /UV [6].…”

Section: N T R O D U C C I ó Nunclassified

Estudio De La Decoloración Del Colorante Sunfix Yellow S4gl Empleando El Proceso De Oxidación Avanzada H2o2/Uv

Pinedo

Anaya²

2018

TECNIA

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RESUMENSe ha realizado el estudio cinético de la decoloración del colorante reactivo Sunfix Yellow S4GL (RAS) empleando una disolución de 20 ppm del colorante mediante el proceso de oxidación avanzada (POA) H2O2/UV. Para ello se evaluó el efecto de la concentración inicial del peróxido de hidrógeno, el pH inicial de la solución, la concentración del colorante y la intensidad de la radiación UV-C sobre la decoloración con el fin de optimizarlos. Los valores óptimos son los siguientes: concentración inicial de H2O2 a 3.8 x 10-2 mol/L, pH3, concentración inicial del colorante a 20mg/L, potencia de radiación 3 lámparas con potencia de 15W de radiación UV-C cada una. El estudio cinético de la decoloración sigue un modelo cinético de pseudo primer orden. Bajo condiciones óptimas se obtuvo un porcentaje de decoloración del 100% luego de una hora de tratamiento. Palabras Clave: decoloración, proceso de oxidación avanzada (POA), peróxido de hidrógeno, radiación UV-C ABSTRACTA study of the kinetics of discoloration of a 20 ppm solution of Sunfix Yellow S4GL (RAS) reactive dye has been carried out using the H2O2/UV advanced oxidation process (AOP). To optimize the process, the effects on the discoloration of the initial concentration of hydrogen peroxide, the initial pH of the solution, the dye concentration and the intensity of the UV-C radiation were evaluated. The optimum values were the following: initial concentration of H2O2: 3.8 x 10-2 mol/L; pH 3; initial dye concentration: 20 mg/L; UV radiation: 3 bulbs with 15 W of UV-C power each. The discoloration reaction followed a pseudo first order kinetic model. Under optimum conditions, a one hour treatment yielded 100% discoloration.

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“…[2]. Among AOPs, the UV/H 2 O 2 treatment was believed to be one of the most promising technologies, as no sludge is formed during the treatment, although it is relatively expensive in comparison to the conventional purification processes [7]. Thus, to offer a technology that is industrially applicable and cost-effective, the UV/H 2 O 2 process needs to be optimized.…”

Section: Introductionmentioning

confidence: 99%

“…Any decolourisation process as well as organic pollutant removal involves many problems as the processes are dependent on several operational conditions and have to be optimized using different statistical multivariate approaches such as Plackett-Burman experimental design, Taguchi method, artificial neural network (ANN), response surface methodology (RSM), etc. [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Optimization of removal of colour and organic pollutants from textile wastewater treated with UV/H₂O₂adopting the Plackett–Burman factorial design

Fakin

Ojstršek

2013

Desalination and Water Treatment

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In the research work presented here, a Plackett-Burman two-level partial factorial design was adopted as a multivariate strategy to determine the optimum UV/H 2 O 2 process conditions for maximizing the treatment efficiency of dye-rich textile effluents. The influence of wastewater parameters, i.e. type and concentration of dye (C Dye ), 100-300 mg/L; concentration of NaCl (C NaCl ), 2.5-3.5 g/L; and concentration of urea (C Urea ), 5-15 g/L; and the amount of NaOH (C NaOH ), 1-2.4 mL/L; as well as the operational parameters, i.e. intensity of UV irradiation (I UV ), 1.2-1.4 kW; the amount of H 2 O 2 ðC H2O2 , 0.7-8.3 mL/L; and treatment time (t), 6-30 min; on the colour and the removal of organic pollutants was investigated. After determining seven variables, laboratory-scale experiments were conducted using two synthetically-prepared wastewaters solutions that were polluted with two structurally different reactive dyes and selected chemicals. The assessment of the UV/H 2 O 2 pilot plant's performance was by monitoring the absorbance and total organic carbon in the treated samples. The obtained results showed that the treatment time and dye concentration had a major impact on the reduction of both reactive dyes. At the same time, the amount of urea and the intensity of UV radiation had a notable influence on the organic pollutant reduction.

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Determination of cost optimal operating conditions for decoloration and mineralization of C. I. Reactive Blue 268 by UV/H2O2 process

Cited by 12 publications

References 21 publications

Application of a mechanistic UV/hydrogen peroxide model at full-scale: Sensitivity analysis, calibration and performance evaluation

Application of a mechanistic UV/hydrogen peroxide model at full-scale: Sensitivity analysis, calibration and performance evaluation

Estudio De La Decoloración Del Colorante Sunfix Yellow S4gl Empleando El Proceso De Oxidación Avanzada H2o2/Uv

Optimization of removal of colour and organic pollutants from textile wastewater treated with UV/H₂O₂adopting the Plackett–Burman factorial design

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Determination of cost optimal operating conditions for decoloration and mineralization of C. I. Reactive Blue 268 by UV/H2O2 process

Cited by 12 publications

References 21 publications

Application of a mechanistic UV/hydrogen peroxide model at full-scale: Sensitivity analysis, calibration and performance evaluation

Application of a mechanistic UV/hydrogen peroxide model at full-scale: Sensitivity analysis, calibration and performance evaluation

Estudio De La Decoloración Del Colorante Sunfix Yellow S4gl Empleando El Proceso De Oxidación Avanzada H2o2/Uv

Optimization of removal of colour and organic pollutants from textile wastewater treated with UV/H2O2adopting the Plackett–Burman factorial design

Contact Info

Product

Resources

About

Optimization of removal of colour and organic pollutants from textile wastewater treated with UV/H₂O₂adopting the Plackett–Burman factorial design