Singlet oxygen-dominated activation of peroxymonosulfate by passion fruit shell derived biochar for catalytic degradation of tetracycline through a non-radical oxidation pathway

Hu, Yi; Chen, Dezhi; Zhang, Rui; Ding, Yuan; Ren, Zhong; Fu, Maosheng; Cao, Xiukun; Zeng, Guisheng

doi:10.1016/j.jhazmat.2021.126495

Cited by 226 publications

(32 citation statements)

References 63 publications

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“…To judge whether the free radicals were formed and participated in the NO oxidation reaction, radical quenching tests were carried out using tert -butanol (TBA), methanol (MeOH), and β-carotene as the scavengers for hydroxyl radical (HO • ), multiple free radicals, and singlet oxygen ( 1 O 2 ). , As shown in Figure b, adding TBA sharply decreases the NO removal efficiency from 85 to 78% at first but fluctuates at around 80–84%. Similarly, adding MeOH and β-carotene also caused a sharp drop of the NO removal efficiency at first, however, which then still gradually recovered to the initial level.…”

Section: Resultsmentioning

confidence: 99%

Microwave-Induced Deep Catalytic Oxidation of NO Using Molecular-Sieve-Supported Oxygen-Vacancy-Enriched Fe–Mn Bimetal Oxides

Yuan

Qian

Yang

et al. 2022

Environ. Sci. Technol.

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A novel microwave (MW) catalytic oxidation denitrification method was developed, which can deeply oxidize NO into nitrate/nitrite with little NO2 yield. A molecular-sieve-supported oxygen-vacancy-enriched Fe2O3–MnO2 catalyst (Ov–Fe–Mn@MOS) was fabricated. Physicochemical properties of the catalyst were revealed by various characterization methods. MW irradiation was superior to the conventional heating method in NO oxidation (90.5 vs 70.6%), and MW empowered the catalyst with excellent low-temperature activity (100–200 °C) and good resistance to H2O and SO2. Ion chromatography analysis demonstrated that the amount of nitrate/nitrite accounted for over 90.0% of the N products, but the main product gradually varied from nitrate to nitrite as the reaction proceeded because of the switching of the main reaction path of NO removal. Mechanism analyses clarified that NO oxidation was a non-radical catalytic reaction: (i) the chemisorbed NO on Mn(IV) reacted with O2* to produce nitrate and (ii) the excited NO* due to MW irradiation reacted with the active O* generated from Ov···O2 to form nitrite. Density functional theory calculations combined with electron paramagnetic resonance tests revealed the promotional effects of Fe2O3 in (i) boosting the Ov’s quantity; (ii) facilitating O2 adsorption; (iii) increasing the nitrite formation; and (iv) alleviating the suppression of SO2.

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Section: Resultsmentioning

confidence: 99%

Microwave-Induced Deep Catalytic Oxidation of NO Using Molecular-Sieve-Supported Oxygen-Vacancy-Enriched Fe–Mn Bimetal Oxides

Yuan

Qian

Yang

et al. 2022

Environ. Sci. Technol.

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“…7. 62,63 Fe 2 P 2 O 7 @C has a unique P–O–Fe conformation with unsaturated Fe 2+ active sites. On the surface of P–O–Fe, Fe 2+ can react with HSO 5 − to produce SO 4 ˙ − and further ˙OH (eqn (1) and (2)).…”

Section: Resultsmentioning

confidence: 99%

Iron pyrophosphate doped carbon nanocomposite for tetracycline degradation by activation of peroxymonosulfate

Zhang

et al. 2022

New J. Chem.

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“…Typically, a higher extent of graphitization favors the electron mediator pathway due to the enhanced pollutant adsorption (by π-π interaction) and increased surface conductivity of the biochar [29,39,84]. Lastly, 1 O 2 generation can be achieved by the reaction of PS with the ketonic groups of biochar [85][86][87]. Furthermore, there are also reports suggesting the involvement of O 2…”

Section: Ps Activationmentioning

confidence: 99%

Application of Biochar as Functional Material for Remediation of Organic Pollutants in Water: An Overview

et al. 2022

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In recent years, numerous studies have focused on the use of biochar as a biological material for environmental remediation due to its low-cost precursor (waste), low toxicity, and diversity of active sites, along with their facile tailoring techniques. Due to its versatility, biochar has been employed as an adsorbent, catalyst (for activating hydrogen peroxide, ozone, persulfate), and photocatalyst. This review aims to provide a comprehensive overview and compare the application of biochar in water remediation. First, the biochar active sites with their functions are presented. Secondly, an overview and summary of biochar performance in treating organic pollutants in different systems is depicted. Thereafter, an evaluation on performance, removal mechanism, active sites involvement, tolerance to different pH values, stability, and reusability, and an economic analysis of implementing biochar for organic pollutants decontamination in each application is presented. Finally, potential prospects to overcome the drawbacks of each application are provided.

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Singlet oxygen-dominated activation of peroxymonosulfate by passion fruit shell derived biochar for catalytic degradation of tetracycline through a non-radical oxidation pathway

Cited by 226 publications

References 63 publications

Microwave-Induced Deep Catalytic Oxidation of NO Using Molecular-Sieve-Supported Oxygen-Vacancy-Enriched Fe–Mn Bimetal Oxides

Microwave-Induced Deep Catalytic Oxidation of NO Using Molecular-Sieve-Supported Oxygen-Vacancy-Enriched Fe–Mn Bimetal Oxides

Iron pyrophosphate doped carbon nanocomposite for tetracycline degradation by activation of peroxymonosulfate

Application of Biochar as Functional Material for Remediation of Organic Pollutants in Water: An Overview

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