Generation of sulfate radicals by supported ruthenium catalyst for phenol oxidation in water

Phenolic contaminants have acquired notable attention in recent years owing to their high toxicity even at low concentrations. This study reports the potential of cost‐effective activated carbon/chitosan/zero‐valent iron nanocomposite obtained from industrial waste residues on the adsorption and degradation of phenol, 2‐chlorophenol, and 2,4‐dichlorophenol from aqueous solution. The Fenton oxidation can supplement the pre‐adsorption process by altering to less hazardous compounds. The impact of initial concentration, contact time, nanocomposite dosage, pH, oxidant dosage, and temperature were monitored. The best matches among three adsorption isotherms Langmuir, Freundlich, and Harkins‐Jura were to Freundlich isotherm and the maximum adsorption capacity of phenol, 2‐chlorophenol and 2,4‐dichlorophenol reached 50.2512, 119.0476 and 114.9425 mg/g respectively. Furthermore, the activation energy, kinetic and thermodynamic parameters of Fenton‐oxidation were perused and affirmed that Fenton reactions are spontaneous with no energy barriers. The removal efficiency of phenol, 2‐chlorophenol, and 2,4‐dichlorophenol by synthesized nanocomposite was 97.7 %, 98.9 %, and 99 %, respectively.

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“…In conclusion, it can propose the probable degradation mechanism for the oxidation of Phe, 2‐chloroPhe and 2,4‐dichloroPhe (Figure 13). [41] …”

Section: Resultsmentioning

confidence: 99%

The Role of Adsorption‐Fenton Oxidation in Degradation of Phenolic Contaminants by Fabrication of Bionanocomposite from Industrial Residue

et al. 2022

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“…For the kinetic study in a plug reactor, correlation coefficients ( R ) of the kinetic model and their parameters for the 8.7% CuO/SBA-15-imp and 8.7%CuO/MOR-SBA-15-imp samples are given in Table . According to this table, the values of R 2 indicated that the assumed rate for this reaction has an appropriate agreement with experimental results.…”

Section: Resultsmentioning

confidence: 99%

“…Different materials such as metal oxide-supported catalysts and metal–organic frameworks have been applied to chemical and petrochemical reactions. − The emission of SO 2 originated from the burning of fuels and many industrial processes and harms the environment and human health . Recently, many countries have enacted strict regulations for limiting the emission of SO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Sulfur Dioxide Removal from Flue Gas by Supported CuO Nanoparticle Adsorbents

Ahmadian

Anbia

Rezaie

2020

Ind. Eng. Chem. Res.

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The development of adsorbents for gas desulfurization is highly essential to control sulfur dioxide emissions. In this article, CuO-modified SBA-15 and MOR-SBA-15 composite adsorbents were prepared by impregnation and post-grafting methods. As-prepared adsorbents were characterized by X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy, and N2 adsorption–desorption methods. Furthermore, the adsorption desulfurization efficiency was investigated. The results proved that the impregnation method exhibited a remarkable dominance compared to the grafting method. The 8.7% CuO/MOR-SBA-15-imp adsorbent showed superior performance compared with other adsorbents in removing SO2 from the flue gas. Moreover, the 8.7%CuO/MOR-SBA-15-imp adsorbent illustrated an excellent regeneration for five cycles. The optimal condition for the flue gas desulfurization with the flow rate of 13 NL/h was 400 °C and a 200 mg adsorbent. Kinetic model studies showed that the model was pseudo-first order, and the amounts of activation energy for the 8.7% CuO/SBA-15-imp and 8.7% CuO/MOR-SBA-15-imp samples were 20.4 and 18.5 kJ/mol, respectively.

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“…Another reason to put active sites on the supporter is to make them available. The supporters have porous surface and allow the metal that used as an active site distributed in these areas and a more accessible surface [19]. To overcome these drawbacks, several solids such as graphite, zeolite, porous silica, carbon nanotube and alumina introduced as supporters or carriers of metal nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Modified Porous Silicon with Zirconium Nanoparticles as a Selective Adsorbent for Phosphate Removal from Aqueous Systems

Anbia

Khodashenas

Kamel

2018

IJEE

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The development of an efficient adsorbent for phosphate removal from wastewater to prevent the eutrophication of surface waters is very important. In this study, porous silicon powder prepared with acidic etching solution (HF: HNO3: H2O). Then, Zirconium-modified porous silicon has been synthesized by a simple and low-cost hydrothermal process. The morphology and structure of the samples were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD). This material has been used as an adsorbent for phosphate ion (PO43-) removal from synthetic aqueous solutions. The effect of operating conditions such as contact time, initial anion concentration, pH, the presence of competitive ions on the adsorption performances and the regeneration of the adsorbent have been investigated. Maximum adsorption amount of 47.7 mg P/g has been obtained at ambient temperature. The maximum removal of phosphate was reached at pH= 4 for Zirconium-modified porous silicon. The adsorption was almost unaffected by the presence of competitive ions. Regeneration tests have shown that the adsorbent retains its capacity after 3 adsorption-desorption cycles.

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Generation of sulfate radicals by supported ruthenium catalyst for phenol oxidation in water

Cited by 9 publications

References 34 publications

The Role of Adsorption‐Fenton Oxidation in Degradation of Phenolic Contaminants by Fabrication of Bionanocomposite from Industrial Residue

The Role of Adsorption‐Fenton Oxidation in Degradation of Phenolic Contaminants by Fabrication of Bionanocomposite from Industrial Residue

Sulfur Dioxide Removal from Flue Gas by Supported CuO Nanoparticle Adsorbents

Modified Porous Silicon with Zirconium Nanoparticles as a Selective Adsorbent for Phosphate Removal from Aqueous Systems

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