Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways

Donadelli, Jorge A.; Carlos, Luciano; Arqués, A.; Einschlag, Fernando S. García

doi:10.1016/j.apcatb.2018.02.057

Cited by 110 publications

(53 citation statements)

References 49 publications

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“…The presence of these colorful contaminants in water can restrict light and oxygen getting into water, leading to serious threat to the survival of aquatic organism. Besides, most organic dyestuffs, such as azo dyes and anthraquinone dye, are toxic or carcinogenic to human body (Huang et al 2017;Mahmood et al 2016;Donadelli et al 2018). In order to remove these refractory contaminants effectively, many advanced technologies, such as membrane separation (Damodar et al 2010), photocatalysis (Wu et al 2017c), adsorption (Ersan et al 2017) and advanced oxidation (Nidheesh et al 2018), have been tried and applied in the wastewater treatment.…”

Section: Removal Of Organic Dyesmentioning

confidence: 99%

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Huang

Song

Chen

et al. 2019

Biochar

291

104

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As a class of famous carbon materials, biochars (BCs) and their derivative materials with excellent physicochemical properties and diversified functionalities present great potential in wastewater treatment fields. This review focuses on the latest development in reported biochar-based materials as superior adsorbents or catalysts for removing harmful organic contaminants from wastewater. The construction and properties of biochar-based materials are briefly introduced at the beginning. As one of the major factors affecting the properties of BCs, the wide diversity of feedstocks, such as agricultural and forest residues, industrial by-products as well as municipal wastes, endows BCs different chemical compositions and structures. Woody and herbaceous BCs usually have higher carbon contents, larger surface areas and strong aromaticity, which is in favor of the organic contaminant removal. Driven by the desire of more cost-effective materials, several types of biochar-based hybrid materials, such as magnetic BC composites (MBC), nanometal/nanometallic oxides/hydroxide BC composites and layered nanomaterial-coated BCs, as well as physically/chemically activated BCs, have also been developed. With the help of foreign materials, these types of hybrid BCs have excellent capacities to remove a wide range of organic contaminants, including organic dyestuff, phenols and chemical intermediates, as well as pharmaceutically active compounds, from aquatic solutions. Depending on the different types of biochar-based materials, organic contaminants can be removed by different mechanisms, such as physical adsorption, electrostatic interaction, π-π interaction and Fenton process, as well as photocatalytic degradation. In summary, the low cost, tunable surface chemistry and excellent physical-chemical properties of BCs allow it to be a potential material in organic contaminant removal. The combination of BCs with foreign materials endows BCs more functionalities and broader development opportunities. Considering the urgent demand of practical wastewater treatment, we hope more researches will focus on the applications and commercialization of biochar-based materials.

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Section: Removal Of Organic Dyesmentioning

confidence: 99%

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Huang

Song

Chen

et al. 2019

Biochar

291

104

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“…The photo-Fenton and Fenton processes are highly pH dependent [29]. The effect of pH was evaluated on eight pH values viz.…”

Section: Effect Of Ph On Catalytic Activity Of Znfe 3 O 4 and Go-znfementioning

confidence: 99%

Degradation of reactive dye using heterogeneous photo-Fenton catalysts: ZnFe₂O₄ and GO-ZnFe₂O₄ composite

Nadeem

Zahid

Tabasum

et al. 2020

Mater. Res. Express

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Dyes, being potential pollutants, need alarming attention for their degradation from wastewater. Advanced oxidation processes (AOPs) are among the most effective methodology for the degradation of pollutants. In the present study, the heterogeneous photo-Fenton catalysts (ZnFe 2 O 4 and graphene oxide based ZnFe 2 O 4 composite) were prepared and used to study the degradation of synzol red reactive dye. The prepared catalysts were well characterized by using SEM, FTIR and XRD analysis. The effect of various parameters like pH, catalysts dosage, H 2 O 2 dosage, effect of dye concentration and irradiation time during heterogeneous photo-Fenton processes was studied. The results showed 57% and 94% degradation of dye under optimized conditions (e.g. pH=3, Catalysts dose=75 mg l −1 for ZnFe 2 O 4 and 50 mg l −1 for GO-ZnFe 2 O 4 , H 2 O 2 dose=27 mM and irradiation time of 60 min) was observed for ZnFe 2 O 4 and GO-ZnFe 2 O 4 , respectively. A comparison of degradation potential of catalysts using various light sources like UV-254 nm, ambient solar light and white LED, was studied. The current findings support the application of solar and LED light for the degradation of organic pollutants in wastewater. The stability and reusability of these catalysts for the degradation of the dye were also studied. The GO-ZnFe 2 O 4 composite showed negligible iron leaching and no considerable reduction in degradation efficiency upto six consecutive cycles of reusability. It has been found that the composite (GO-ZnFe 2 O 4 ) showed enhanced degradation of dye as compared to ZnFe 2 O 4 .

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“…However, some controversies still exist with regard to the formation of different oxidants. 59,60 In this study, a popular hydroxyl radical scavenger t-butanol was employed to catching $OH produced by Fenton reaction for CXT degradation. As shown in Fig.…”

Section: Synergistically Enhanced Reaction Mechanismmentioning

confidence: 99%

Microbial synthesis of hollow porous Prussian blue@yeast microspheres and their synergistic enhancement of organic pollutant removal performance

Chen

Bai

et al. 2019

RSC Adv.

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Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways

Abstract: Please cite this article as: Donadelli JA, Carlos L, Arques-Sanz A, García Einschlag FS, Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways,

Cited by 110 publications

References 49 publications

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Degradation of reactive dye using heterogeneous photo-Fenton catalysts: ZnFe₂O₄ and GO-ZnFe₂O₄ composite

Microbial synthesis of hollow porous Prussian blue@yeast microspheres and their synergistic enhancement of organic pollutant removal performance

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Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways

Abstract: Please cite this article as: Donadelli JA, Carlos L, Arques-Sanz A, García Einschlag FS, Kinetic and mechanistic analysis of azo dyes decolorization by ZVI-assisted Fenton systems: pH-dependent shift in the contributions of reductive and oxidative transformation pathways,

Cited by 110 publications

References 49 publications

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Biochar-based materials and their applications in removal of organic contaminants from wastewater: state-of-the-art review

Degradation of reactive dye using heterogeneous photo-Fenton catalysts: ZnFe2O4 and GO-ZnFe2O4 composite

Microbial synthesis of hollow porous Prussian blue@yeast microspheres and their synergistic enhancement of organic pollutant removal performance

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Product

Resources

About

Degradation of reactive dye using heterogeneous photo-Fenton catalysts: ZnFe₂O₄ and GO-ZnFe₂O₄ composite