A Comparative Study on a Cationic Dye Removal through Homogeneous and Heterogeneous Fenton Oxidation Systems

Bayrami, Abolfazl; Shafeeyan, Mohammad Saleh; Raman, Abdul Aziz Abdul; Daud, Wan Mohd Ashri Wan

doi:10.17344/acsi.2017.3732

Cited by 22 publications

(1 citation statement)

References 22 publications

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“…19 In another work with goethite as the catalyst, the highest degradation of methylene blue was achieved under alkaline conditions; the cationic nature of methylene blue was responsible for this behavior since it facilitates the adsorption on goethite at high pH values. 31 At this point, it is important to remark that adsorption can improve the degradation of pollutants, as suggested by Konstantinou and Albanis 32 for heterogeneous processes. Since heterogeneous sono-Fenton processes are based on the generation of • OH on the surface of the solid catalyst, it is reasonable to consider that adsorption of RR-120 onto goethite could be beneficial for the degradation process.…”

Section: Degradation Of Rr-120 By Sono-fenton Processesmentioning

confidence: 89%

Degradation of Reactive Red 120 dye by a heterogeneous Sono-Fenton process with goethite deposited onto silica and calcite sand

Garófalo-Villalta

Medina-Espinosa

Sandoval‐Pauker

et al. 2020

JSCS

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The degradation of Reactive Red 120 dye (RR-120) in synthetic waters was studied. Two processes were considered: homogeneous sono-Fenton with iron(II) sulfate and heterogeneous sono-Fenton with synthetic goethite and goethite deposited onto silica and calcite sand (modified catalysts GS and GC, respectively). In 60 min of reaction, the homogeneous sono-Fenton process allowed a degradation of 98.10 %, in contrast with 96.07 % for the heterogeneous sono-Fenton process with goethite at pH 3.0. The removal of RR-120 increased when the modified catalysts were used instead of bare goethite. Chemical oxygen demand (COD) and total organic carbon (TOC) measurements showed that the highest TOC and COD removals were achieved with the homogeneous sono-Fenton process. Biochemical oxygen demand (BOD 5) measurements allowed confirmed that the highest value of BOD 5 /COD was achieved with a heterogeneous sono-Fenton process (0.88±0.04 with the modified catalyst GC), demonstrating that the biodegradability of the residual organic compounds was remarkably improved.

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Section: Degradation Of Rr-120 By Sono-fenton Processesmentioning

confidence: 89%

Degradation of Reactive Red 120 dye by a heterogeneous Sono-Fenton process with goethite deposited onto silica and calcite sand

Garófalo-Villalta

Medina-Espinosa

Sandoval‐Pauker

et al. 2020

JSCS

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Synthesis of highly crystalline photocatalysts based on TiO2 and ZnO for the degradation of organic impurities under visible-light irradiation

et al. 2019

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A TiO 2 -ZnO binary oxide system (with molar ratio TiO 2 :ZnO = 8:2) was synthesized by a hydrothermal method, assisted by calcination at temperatures of 500, 600 and 700 °C, using zinc citrate as the precursor of ZnO. The morphology (SEM, TEM), crystalline structure (XRD, Raman spectroscopy), diffuse reflectance spectra (DRS), chemical surface composition (EDXRF), porous structure parameters (low-temperature N 2 sorption) and characteristic functional groups (FT-IR) of the TiO 2 -ZnO oxide materials were comprehensively analyzed. The novelty of this work is the observation of the coexistence of the crystalline structures of anatase and ZnTiO 3 in TiO 2 -ZnO oxide materials. Moreover, it is shown that the obtained materials absorb visible radiation. The key stage of the study was the evaluation of the photocatalytic activity of the TiO 2 -ZnO binary oxide systems in the degradation of model organic pollutants: C.I. Basic Red 1, C.I. Basic Violet 10, C.I. Basic Blue 3 and 4-nitrophenol. For all synthesized materials, a high efficiency of degradation of the model organic impurities was demonstrated. The results show that the synthesized products may be materials of interest for use in the degradation of organic pollutants. Moreover, the kinetics of the photocatalytic degradation of selected organic compounds were determined based on the Langmuir-Hinshelwood equation, assuming a pseudo-first-order (PFO) reaction.

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Enhanced UV–Visible photocatalytic activity of Cu-doped ZnO/TiO2 nanoparticles

Khaki

Shafeeyan

Raman

et al. 2018

J Mater Sci: Mater Electron

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A Comparative Study on a Cationic Dye Removal through Homogeneous and Heterogeneous Fenton Oxidation Systems

Cited by 22 publications

References 22 publications

Degradation of Reactive Red 120 dye by a heterogeneous Sono-Fenton process with goethite deposited onto silica and calcite sand

Degradation of Reactive Red 120 dye by a heterogeneous Sono-Fenton process with goethite deposited onto silica and calcite sand

Synthesis of highly crystalline photocatalysts based on TiO2 and ZnO for the degradation of organic impurities under visible-light irradiation

Enhanced UV–Visible photocatalytic activity of Cu-doped ZnO/TiO2 nanoparticles

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