Synthesis of coal fly ash zeolite for the catalytic wet peroxide oxidation of Orange II

H, Ramírez; Núñez, María Margarita Guerra; Bogoya, Anamaria Barrera; Gomez, Daniel Fernando Blanco; Ramos, Cinthia Paula; Luca, Carla di; Inchaurrondo, Natalia; Haure, Patricia M.

doi:10.1007/s11356-018-3315-1

Cited by 9 publications

(4 citation statements)

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“…Then, kinetic experiments were carried out to assess the effect of initial Cu(II) concentration (45-200 mg•L −1 ), using both the Na-based zeolites at dosages 0.3, 0.5, 1.0, and 1.5 g•L −1 , on the degree of copper removal. The suspensions (3 mL aliquots) were taken at predefined time intervals (5,10,15,20,30, and 60 min), filtered using syringe filters (0.45 µm pore size, Polytetrafluoroethylene (PTFE), Chromafil) and analyzed with inductively-coupled plasma mass spectrometry (ICP-MS) in order to determine the residual metal ion concentration. All tests were carried out in conical flasks, with an operating volume of 250 mL, at a constant ionic strength of 0.1 M NaCl and room temperature (25 ± 1 • C) under stirring at 600 rpm using a magnetic stirrer (Agimatic-ED; J.P. Selecta, Barcelona, Spain).…”

Section: Kinetic Studiesmentioning

confidence: 99%

“…The voids and internal channels present in the zeolite network allow easy access and fast diffusion rates of molecules, thus rendering the zeolites as efficient adsorbents for various contaminants [14]. Zeolites can be used in several environmental applications, including removal of heavy metal ions and other inorganic and organic contaminants from municipal, agricultural, mining, metallurgical, and various other industrial wastewaters [15][16][17][18][19][20][21]. Zeolites may also be used to remove inorganic and organic air pollutants, including nitrogen oxides (NOx) and volatile organic compounds (VOCs) [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Zeolites from Greek Fly Ash and Assessment of Their Copper Removal Capacity

2020

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The objective of this study was to synthesize zeolites through fusion of lignite fly ash and NaOH or KOH pellets at 600 °C and assess their removal efficiency in terms of decontamination of solutions containing Cu(II) ions. The removal efficiency of the produced zeolites was tested in batch kinetic experiments using different zeolites and Cu(II) ion concentrations. Experimental data revealed that zeolites synthesized with the use of NaOH exhibited higher removal efficiency compared with those synthesized with the use of KOH. Kinetic data showed that the pseudo-second-order equations described well the removal process. Copper removal was mainly accomplished through the concerted action of chemisorption and intraparticle diffusion. Analytical techniques involving XRF, XRD, FTIR, SEM/EDS and XPS were used for the characterization and morphology analysis of the produced zeolites. SEM/EDS confirmed the presence of copper on the zeolite surface. XPS spectra of Cu2p at 934.3 eV proved the presence of Cu(II) oxidation state, confirming the possible formation of CuO and/or Cu-Cl.

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Section: Kinetic Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis of Zeolites from Greek Fly Ash and Assessment of Their Copper Removal Capacity

2020

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“…Nowadays, the use of low-cost sources, such as biomass (Diaz de Tuesta et al, 2021;Juhola et al, 2019), sludge (Wang et al, 2020), metal slags (Cheng et al, 2017), furnace ashes (Ramirez et al, 2019), to produce catalysts, has become popular. Wastes are inexpensive and the process allows converting the undesirable waste into value-added materials and catalysts.…”

Section: Introductionmentioning

confidence: 99%

Kinetic insights on wet peroxide oxidation of caffeine using EDTA-functionalized low-cost catalysts prepared from compost generated in municipal solid waste treatment facilities

Tuesta

Almeida

Oliveira

et al. 2021

Environmental Technology & Innovation

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“…Fenton-like catalysts based on zeolites modified by other metal oxides have been recently studied [29]. The CFAZs have attracted the attention of researchers as catalysts for Fenton oxidation processes because they contain iron oxides in the form of magnetite, maghemite, and hematite, which are transferred from the raw coal ash [30,31]. In addition, they can be modified with different metal oxides to improve their catalytic properties [32,33].…”

Section: Introductionmentioning

confidence: 99%

Studies on the Potential of Nonmodified and Metal Oxide-Modified Coal Fly Ash Zeolites For Adsorption of Heavy Metals and Catalytic Degradation of Organics for Waste Water Recovery

et al. 2020

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A nanocrystalline zeolite of Na-X type (CFAZ) was synthesized by ultrasonic-assisted double stage fusion-hydrothermal alkaline conversion of lignite coal fly ash. Modified CFAZ with magnetic nanoparticles (MNP-CFAZ) was obtained by adding presynthesized magnetic nanoparticles between the synthesis stages. CFAZs loaded by particles of copper (Cu-CFAZ) and cobalt (Co-CFAZ) oxides were prepared by postsynthesis modification of the parent CFAZ, applying a wet impregnation technique. The parent and modified CFAZs were examined for their phase composition by X-ray diffraction, morphology by scanning electron microscopy, and surface characteristics by N2 physisorption. Comparative studies have been carried out on the adsorption capacity of the starting CFAZ and its derivatives with respect to Cd2+- and Pb2+-ions from aqueous solutions. Adsorption isotherms of Cd2+-ions on the studied samples were plotted and described by the adsorption equations of Langmuir, Freundlich, Langmuir–Freundlich, and Temkin. The best correlation between the experimental and model isotherms for the parent and modified CFAZ was found with the Langmuir linear model, assuming a monolayer adsorption mechanism. Parent and modified CFAZs were also studied as catalysts for heterogeneous thermal Fenton oxidation of methylene blue. At 90 °C, the higher catalytic activity exhibits the nonmodified sample, but with the decrease in temperature to 60 °C, the modified samples are more effective catalysts.

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Synthesis of coal fly ash zeolite for the catalytic wet peroxide oxidation of Orange II

Cited by 9 publications

References 50 publications

Synthesis of Zeolites from Greek Fly Ash and Assessment of Their Copper Removal Capacity

Synthesis of Zeolites from Greek Fly Ash and Assessment of Their Copper Removal Capacity

Kinetic insights on wet peroxide oxidation of caffeine using EDTA-functionalized low-cost catalysts prepared from compost generated in municipal solid waste treatment facilities

Studies on the Potential of Nonmodified and Metal Oxide-Modified Coal Fly Ash Zeolites For Adsorption of Heavy Metals and Catalytic Degradation of Organics for Waste Water Recovery

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