Optimization of Fenton's oxidation of chemical laboratory wastewaters using the response surface methodology

Benatti, Cláudia Telles; Tavares, Célia Regina Granhen; Guedes, Terezinha Aparecida

doi:10.1016/j.jenvman.2005.08.014

Cited by 116 publications

(77 citation statements)

References 31 publications

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“…For effluents treated with the Fenton method, the maximum limit is 15 mg/l for the total iron before direct discharge into the environment as directed by EU's regulation (Benatti et al, 2006). Therefore, concentrations of the total soluble iron ions in the supernatant were determined in inductively coupled plasma optical emission spectroscopy 7000 DV (ICP-OES, Perkin Elmer).…”

Section: Discussionmentioning

confidence: 99%

“…As observed by Benatti et al (2006), the ratio of [H 2 O 2 ]: [Fe 2+ ] is a crucial factor that determines the degradation efficiency. All the variables studied are known to interact strongly and the overall process efficacy relies on attaining a balance in quantities of both the Fenton's reagents used in relation to the strength of the organic contamination.…”

Section: Oxidant To Catalyst Mass Ratio [H 2 O 2 ]:[Fe 2+ ]mentioning

confidence: 97%

“…This leads to retarding the regeneration of Fe 2+ by reaction of Fe 3+ with H2O2 which is necessary for sustenance of the oxidation reaction. Literature is replete with studies that established optimum pH in Fenton's process to range between 2.5 and 3.5 (Benatti et al, 2006;Iurascu et al, 2009;Kavitha and Palanivelu, 2004;Zazo et al, 2009;Kiril et al, 2010). Thus, in this study initial reaction pH was fixed at 3.…”

Section: Experimental Design Data Analysis and Process Optimizationmentioning

confidence: 99%

“…The ranges of values used in this study were chosen to fall within the reported limits (Benatti et al, 2006;Martins et al, 2010;Martins et al, 2005 ]. However, recent studies report use of mass of reagents instead of molar concentration (Martins et al, 2005;Benatti et al, 2006;Martins et al, 2010;Bach et al, 2010). We thus, adopted the mass approach to determine the necessary amounts of the reagents that would maintain the ratio of the designed matrix (Table 1).…”

Section: Oxidant To Catalyst Mass Ratio [H 2 O 2 ]:[Fe 2+ ]mentioning

confidence: 99%

See 3 more Smart Citations

Application of response surface methodology in process parameters optimization for phenol mineralization using Fentons peroxidation

Hasan¹,

Mohd²,

Daud³

2011

Afr. J. Biotechnol.

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Adverse effect of the highly biorecalcitrant compound phenol to the environment is well established and its concentrations in industrial effluents vary greatly from 2.8 to 6,800 mg/l depending on the source. Fenton process effectively mineralises to CO 2 and H 2 O but reported works consumed more reagents and require longer reaction times. Due to the strong interaction between the several predictor variables in the Fenton oxidation, response surface methodology was used to optimise the mineralization treatment. Efficient, faster and economical operating conditions for phenol removal were explored by investigating four parameters namely the concentration ratio of hydrogen peroxide to phenol - ((H 2 O ], respectively. The soluble iron content of the analysed supernatant was found to be below the 15 mg/l (the maximum limit allowable for total iron discharges required by common regulative subscribed). This indicated that, the Fenton reagents were utilised during the peroxidation reaction evident from the almost near consumption of all Fe 2+ introduced in about 85% of the samples, thus, negating the need for immobilising the Fe 2+ catalyst or its removal by post treatment. The work proves that the optimized Fenton process can be potentially used for treatment of any phenol containing wastewater.

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Section: Discussionmentioning

confidence: 99%

Section: Oxidant To Catalyst Mass Ratio [H 2 O 2 ]:[Fe 2+ ]mentioning

confidence: 97%

Section: Experimental Design Data Analysis and Process Optimizationmentioning

confidence: 99%

Section: Oxidant To Catalyst Mass Ratio [H 2 O 2 ]:[Fe 2+ ]mentioning

confidence: 99%

See 2 more Smart Citations

Application of response surface methodology in process parameters optimization for phenol mineralization using Fentons peroxidation

Hasan¹,

Mohd²,

Daud³

2011

Afr. J. Biotechnol.

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“…El azul de metileno es un colorante utilizado en la industria textil, cosmética, farmacéutica, alimenticia, de plásticos, papel, educativa, investigativa, entre otras [5]. Las descargas de estas industrias contiene tintes los cuales son altamente visibles a bajas concentraciones y producen problemas de contaminación como aumento de la demanda química de oxí-geno y de la toxicidad, además de la disminución de la penetración de la luz y por ende de la fotosíntesis, sin mencionar, el efecto estético sobre la superficie del agua [6][7][8].…”

Section: Introductionunclassified

Removal of methylene blue from aqueous solutions using cassava peel (Manihot esculenta) modified with phosphoric acid // Remoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfórico

2017

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Remoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfóricoRemoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfórico RESUMENEste trabajo reporta la modificación de la cáscara de la yuca con ácido fosfórico para la remoción de azul de metileno de soluciones acuosas. Se utilizó una metodología experimental con diseño compuesto central 3^2+estrella, variando la temperatura de modificación de la cáscara de yuca (113°C a 127°C), la relación biomasa-ácido fosfórico (1:0.5 a 1:1.5) y la concentración inicial del colorante (100 a 800 mg/L), utilizando como variables de respuesta el porcentaje de remoción y la capacidad de adsorción. Se encontró que, para el porcentaje de remoción del colorante, la variable más importante es la temperatura y que la capacidad de adsorción se favorece a concentraciones altas de colorante. La cáscara de yuca modificada a la temperatura más alta (127°C) y relación másica de biomasa-ácido 1:1 presentó mayores valores tanto para el porcentaje de remoción como para la capacidad de adsorción, los cuales fueron de 99.984% y 79.975 mg/g, respectivamente. La cinética de adsorción se ajustó al modelo de pseudo segundo orden lo cual sugiere que el proceso se realiza por quimisorción, además, ajustó con las isotermas de Freundlich, lo que sugiere que la adsorción se realiza en múltiples capas.Palabras clave: Cáscara de yuca; Azul de metileno; Remoción; Adsorción; Cinética; Isotermas de equilibrio. ABSTRACTThis work reports the modification of cassava peel using phosphoric acid for the removal of methylene blue from aqueous solutions. A central composite design 3^2+star was employed using as manipulated variables the temperature of modification (113 ° C to 127 ° C), the biomass-phosphoric acid ratio (1: 0.5 to 1: 1,5) and the initial concentration of dye (100 to 800 mg/L); the response variables of the experiment were the percentage of removal and the adsorption capacity. It was found that for the percentage of removal of dye, the most important variable is the temperature, and that the adsorption capacity is favored at high concentrations of dye. The cassava peel modified at the highest temperature (127 ° C) and biomass:acid mass ratio 1:1 showed higher values for both the removal percentage and the adsorption capacity, which were 99.984% and 79.975 mg/g, respectively. The adsorption kinetics was best adjusted to a pseudo second order kinetic model, which indicates that the process is carried out by chemisorption, also, the process was adjusted to Freundlich isotherms, indicating that the adsorption is carried out in multiple layers.

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Investigation of Basalt Properties as Heterogeneous Catalyst for Fenton Oxidation of Textile Wastewater

Saleh

Yalvaç

Arslan

et al. 2021

CLEAN Soil Air Water

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In this study, basalt is used as a catalyst for the removal of the dyes malachite green (MG) and crystal violet (CV) from aqueous solution. First, the effect of sintering temperature on Fenton process is optimized using basalt powder. Different analysis techniques such as X-ray diffraction (XRD), X-ray fluorescence (XRF), Brunauer-Emmett-Teller (BET), and Fourier-Transform Infrared Spectroscopy (FTIR) are used to characterize basalt powder. It is concluded that Fe 2 O 3 in basalt powder is the main component responsible for the degradation of dyes in the Fenton process. The maximum degradation of the dyes (97.02% for CV and 95.71% for MG) is obtained at 10 mg L −1 dye concentration, solution pH of 6, 1 g L −1 catalyst amount, and 12 mm H 2 O 2 concentration for 2 h. The results are fitted to the second-order kinetic model. The reusability of the catalyst is explored, and the basalt showed stability in the removal efficiency for repeated five cycles. The degradation of real textile wastewater is also studied. The removal efficiency reached up to 60.33% at optimum conditions of pH 2, basalt amount of 5 g L −1 , H 2 O 2 concentration of 400 mm. The results showed that the basalt powder is successfully utilized as a heterogeneous catalyst for textile wastewater treatment.

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Optimization of Fenton's oxidation of chemical laboratory wastewaters using the response surface methodology

Cited by 116 publications

References 31 publications

Application of response surface methodology in process parameters optimization for phenol mineralization using Fentons peroxidation

Application of response surface methodology in process parameters optimization for phenol mineralization using Fentons peroxidation

Removal of methylene blue from aqueous solutions using cassava peel (Manihot esculenta) modified with phosphoric acid // Remoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfórico

Investigation of Basalt Properties as Heterogeneous Catalyst for Fenton Oxidation of Textile Wastewater

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