Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction

Raheb, Ibrahim; Manlla, Mohammad Sameh

doi:10.1016/j.heliyon.2021.e07427

Cited by 35 publications

(16 citation statements)

References 31 publications

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“…The light radiation wavelength, time irradiation, initial dye concentration, photocatalyst composition, electronic structure and morphology are the main parameters to control rate and mechanism of photodegradation of dyes and organic compounds [ 68 , 69 ]. Figure 9 shows experimental data of the photocatalytic degradation of MB under UV irradiation.…”

Section: Resultsmentioning

confidence: 99%

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Magnetic Core-Shell Iron Oxides-Based Nanophotocatalysts and Nanoadsorbents for Multifunctional Thin Films

et al. 2022

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In recent years, iron oxides-based nanostructured composite materials are of particular interest for the preparation of multifunctional thin films and membranes to be used in sustainable magnetic field adsorption and photocatalysis processes, intelligent coatings, and packing or bio-medical applications. In this paper, superparamagnetic iron oxide (core)-silica (shell) nanoparticles suitable for thin films and membrane functionalization were obtained by co-precipitation and ultrasonic-assisted sol-gel methods. The comparative/combined effect of the magnetic core co-precipitation temperature (80 and 95 °C) and ZnO-doping of the silica shell on the photocatalytic and nano-sorption properties of the resulted composite nanoparticles were investigated by ultraviolet-visible (UV-VIS) spectroscopy monitoring the discoloration of methylene blue (MB) solution under ultraviolet (UV) irradiation and darkness, respectively. The morphology, structure, textural, and magnetic parameters of the investigated powders were evidenced by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, Brunauer–Emmett–Teller (BET) measurements, and saturation magnetization (vibrating sample magnetometry, VSM). The intraparticle diffusion model controlled the MB adsorption. The pseudo- and second-order kinetics described the MB photodegradation. When using SiO2-shell functionalized nanoparticles, the adsorption and photodegradation constant rates are three–four times higher than for using starting core iron oxide nanoparticles. The obtained magnetic nanoparticles (MNPs) were tested for films deposition.

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Section: Resultsmentioning

confidence: 99%

“…−1 ) is similar to the one reported in literature (0.046 min. −1 ) for Fe 3 O 4 at 303 K (MB 40 mg/L) [ 69 ]. Ten times faster degradation first-order rate values, k1, than the one reported by Dangher [ 32 ] for Fe 3 O 4 -SiO 2 photocatalyst, were obtained for M1-S1 (0.20105 min.…”

Section: Resultsmentioning

confidence: 99%

Magnetic Core-Shell Iron Oxides-Based Nanophotocatalysts and Nanoadsorbents for Multifunctional Thin Films

et al. 2022

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“…Adsorbents containing a high amount of cellulose can absorb basic dyes irreversibly [ 72 ]. The decrease in concentration of methylene blue in untreated sample also occurred because of heat from the UV radiation during the testing process [ 73 ].…”

Section: Discussionmentioning

confidence: 99%

Physical Properties of Fast-Growing Wood-Polymer Nano Composite Synthesized through TiO2 Nanoparticle Impregnation

et al. 2022

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Mangium (Acacia mangium Willd.) is a fast-growing wood that is widely grown in Indonesia. The impregnation method is needed to improve the qualities of the wood. In this study, TiO2 nanoparticle (79.17 nm) was produced using the hydrothermal method. The purpose of this study was to analyze the effect of TiO2 nanoparticle impregnation on the density and dimensional stability of mangium and the effectiveness of the presence of TiO2 nanoparticle in wood in degrading pollutants. The mangium samples (2 cm × 2 cm × 2 cm) were placed inside impregnation tube. The impregnation solutions included water (untreated), 1% TiO2 nanoparticle, and 5% TiO2 nanoparticles. The samples were analyzed for density, weight percent gain (WPG) dan bulking effect (BE). Samples were also analyzed by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). TiO2 nanoparticle resulted in an increase in density, WPG, and BE-treated mangium. Based on XRD and FTIR results, TiO2 nanoparticle was successfully impregnated into mangium wood. Scanning electron microscopy–energy-dispersive X-ray spectroscopy analysis indicated that TiO2 nanoparticle covered the surface of the wood cells. The TiO2-impregnated mangium wood has a higher photocatalyst activity than untreated, indicating better protection from UV radiation and pollutants.

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“…At all the applied temperatures, the measured K app (min −1 ) for NC is more than that calculated for NM and related to the higher activity of NC compared with NM. The calculated K app increases with temperature for the two catalysts and is due to the increase in the rate of reaction with temperature [71].…”

Section: Effect Of Hydrogen Peroxide Concentrationmentioning

confidence: 90%

“…Data in Table 5 reveal (i) the good application of Eqs.25, 26 were confirmed by higher correlation coefficients for both models (> 0.9933). (ii) Photo-Fenton degradation of MB in the presence of prepared nanocatalysts with a physical nature is based on the calculated values of activation energy which is lower than 20 kJ/mol [71]. (iii) The positive values of ΔH* indicate that photo-Fenton degradation of MB is endothermic.…”

Section: Effect Of Temperature On Methylene Blue Degradation By Photo...mentioning

confidence: 99%

Adsorption and Photo-Fenton Degradation of Methylene Blue Using Nanomagnetite/Potassium Carrageenan Bio-Composite Beads

et al. 2022

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The present study deals with the preparation of nanomagnetite (NM), potassium carrageenan (KC), and nanomagnetite/potassium carrageenan bio-composite beads (NC). Characterization of the prepared solid materials using different physicochemical techniques such as X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscope (TEM), energy-disperse X-ray spectroscopy (EDX), diffuse reflectance spectrophotometer (DRS), swelling ratio (SR%), N2 adsorption, pH of point of zero charges (pHPZC), and Fourier transform infrared spectroscopy (FTIR). Comparing between adsorption and photo-Fenton degradation process for methylene blue (MB) on the surface of the prepared solid materials. Nanomagnetite/potassium carrageenan bio-composite (NC) exhibited high specific surface area (406 m2/g), mesoporosity (pore radius, 3.64 nm), point of zero charge around pH6.0, and the occurrence of abundant oxygen-containing functional groups. Comparison between adsorption and photo-Fenton oxidation process for methylene blue (MB) was carried out under different application conditions. NC exhibited the maximum adsorption capacity with 374.50 mg/g at 40 °C after 24 h of shaking time while 96.9% of MB was completely degraded after 20 min of photo-Fenton process. Langmuir's adsorption model for MB onto the investigated solid materials is the best-fitted adsorption model based on the higher correlation coefficient values (0.9771–0.9999). Kinetic and thermodynamic measurements prove that adsorption follows PSO, endothermic, and spontaneous process, while photo-Fenton degradation of MB achieves PFO, nonspontaneous, and endothermic process. Photo-Fenton degradation is a fast and simple technique at a lower concentration of dye (< 40 mg/L) while at higher dye concentration, the adsorption process is preferred in the removal of that dye.

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Kinetic and thermodynamic studies of the degradation of methylene blue by photo-Fenton reaction

Cited by 35 publications

References 31 publications

Magnetic Core-Shell Iron Oxides-Based Nanophotocatalysts and Nanoadsorbents for Multifunctional Thin Films

Magnetic Core-Shell Iron Oxides-Based Nanophotocatalysts and Nanoadsorbents for Multifunctional Thin Films

Physical Properties of Fast-Growing Wood-Polymer Nano Composite Synthesized through TiO2 Nanoparticle Impregnation

Adsorption and Photo-Fenton Degradation of Methylene Blue Using Nanomagnetite/Potassium Carrageenan Bio-Composite Beads

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