Decolorization of an azo dye Orange G in aqueous solution by Fenton oxidation process: Effect of system parameters and kinetic study

Sun, Sheng-Peng; Li, Chengjie; Sun, Jian; Shi, Shao-Hui; Fan, Maohong; Zhou, Qi

doi:10.1016/j.jhazmat.2008.04.080

Cited by 299 publications

(139 citation statements)

References 20 publications

(24 reference statements)

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“…For example, degradation of SMMS declined from 98.5% to 92.2% when the concentration of H 2 O 2 was increased from 0.49 to 1.92 mmol/L in the photo-Fenton process. This phenomenon has been widely reported by many researchers [20,22,27,29]. This could be explained by a critical concentration of H 2 O 2 in the Fenton oxidation process.…”

Section: Optimization Of Reaction Parameterssupporting

confidence: 59%

“…As the concentration of H 2 O 2 increased beyond the critical value, it would become a scavenger of ·OH (eqs. (5) and (6) [21,27]. In the present study, experi- Figure 6.…”

Section: Optimization Of Reaction Parametersmentioning

confidence: 52%

“…In the past few years, many studies have shown that degradation of pollutants in water by the Fenton process was greatly enhanced by ultraviolet (UV) irradiation [25][26][27][28]. The combination of Fenton's reagent with UV is called the photo-Fenton process.…”

mentioning

confidence: 99%

“…However, many factors will affect the degradation efficiency of organic pollutants in the photo-Fenton system, including pH, temperature, and the concentrations of H 2 O 2 , Fe 2+ , Cl  , dissolved organic matter (DOM) and contaminations [27,30].…”

mentioning

confidence: 99%

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Degradation of the antibiotic sulfamonomethoxine sodium in aqueous solution by photo-Fenton oxidation

et al. 2012

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In this study, photo-Fenton oxidation was applied to degradation of sulfamonomethoxine sodium (SMMS) in aqueous solution. The operation parameters of pH, temperature, and concentrations of H 2 O 2 , Fe 2+ and SMMS were investigated. The optimum conditions for the photo-Fenton process were determined as follows:.51 mol/L and T=25°C. Under these conditions 98.5% of the SMMS degraded. The kinetics were also studied, and degradation of SMMS by the photo-Fenton process could be described by first-order kinetics. The apparent activation energy was calculated as 23.95 kJ/mol. Mineralization of the process was investigated by measuring the chemical oxygen demand (COD), and the COD decreased by 99% after 120 min. This process could be used as a pretreatment method for wastewater containing sulfamonomethoxine sodium.sulfamonomethoxine sodium, degradation, photo-Fenton

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Section: Optimization Of Reaction Parameterssupporting

confidence: 59%

“…As the concentration of H 2 O 2 increased beyond the critical value, it would become a scavenger of ·OH (eqs. (5) and (6) [21,27]. In the present study, experi- Figure 6.…”

Section: Optimization Of Reaction Parametersmentioning

confidence: 52%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Degradation of the antibiotic sulfamonomethoxine sodium in aqueous solution by photo-Fenton oxidation

et al. 2012

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“…When the H 2 O 2 concentration was higher than 85.86 mmol/L, the removal rate decreased slightly instead of increasing. This could be seen from the Equation (3), when the H 2 O 2 dosage was large, the excess of H 2 O 2 had quenching effect with the generation of ·OH [19]. Therefore, the optimal dosage of H 2 O 2 was determined as 76.32 mmol/L.…”

Section: Effect Of H 2 O 2 Dosagementioning

confidence: 99%

Treatment of the High Concentration Nonylphenol Ethoxylates (NPEOs) Wastewater by Fenton Oxidation Process

Zhou¹,

Zhang²

2017

AJAC

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The Fenton oxidation process was applied in the treatment of an actual high concentration nonylphenol Ethoxylates (NPEOs) wastewater. The effects of H 2 O 2 dosage, molar ratio of H 2 O 2 /Fe 2+ (Fe 2+ dosage), pH value and reaction time on the degradation of NPEOs were investigated. The orthogonal experiment indicated that the order of degree of influence on the COD removal was molar ratio of H 2 O 2 /Fe 2+ , reaction time, dosage of H 2 O 2 , and initial pH. The single-factor tests were carried out to determine the optimal conditions, and the results were H 2 O 2 dosage of 76.32 mmol/L, molar ratio of H 2 O 2 /Fe 2+ of 3, pH value of 5 and reaction time of 2 h. Under the optimum operation conditions, the COD removal efficiency was 85.6% and the effluent could be mixed with other wastewater into the large-scale biological treatment system.

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Coordinating the Mechanisms of Action of Ferroptosis and the Photothermal Effect for Cancer Theranostics

et al. 2022

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Combination therapy based on different mechanisms of cell death has shown promise in tumor therapy. However, when different modalities are integrated, the maximum synergy of the therapeutic effects is often lacking in the design. Herein, we report a cancer theranostic nanomedicine formula developed by considering the mechanisms of action of ferroptosis and the photothermal effect in combination therapy. The croconaine molecule was encapsulated as both a photothermal converter and an iron‐chelating agent with BSA, thus leading to biocompatible and stable Cro‐Fe@BSA nanoparticles (NPs). The Cro‐Fe@BSA NPs in the tumor milieu showed an activated photothermal effect leading to enhanced radical formation owing to the temperature‐dependent Fenton reaction kinetics, while radical formation during ferroptosis in turn prevented the heat‐induced formation of heat shock proteins and thus the self‐protection mechanism of cancer cells in response to heat. The activatable photoacoustic and magnetic resonance imaging performance of the Cro‐Fe@BSA NPs also enabled safe and reliable cancer theranostics.

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Decolorization of an azo dye Orange G in aqueous solution by Fenton oxidation process: Effect of system parameters and kinetic study

Cited by 299 publications

References 20 publications

Degradation of the antibiotic sulfamonomethoxine sodium in aqueous solution by photo-Fenton oxidation

Degradation of the antibiotic sulfamonomethoxine sodium in aqueous solution by photo-Fenton oxidation

Treatment of the High Concentration Nonylphenol Ethoxylates (NPEOs) Wastewater by Fenton Oxidation Process

Coordinating the Mechanisms of Action of Ferroptosis and the Photothermal Effect for Cancer Theranostics

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