Peroxymonosulfate activation by iron self-doped sludge-derived biochar for degradation of perfluorooctanoic acid: A singlet oxygen-dominated nonradical pathway

Fu, Shiyuan; Zhang, Yi; Xu, Xiangyang; Dai, Xiaohu; Zhu, Liang

doi:10.1016/j.cej.2022.137953

Cited by 49 publications

(10 citation statements)

References 71 publications

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“…Metal atoms can also be incorporated into NBCs to enhance the PS-AOP catalytic degradation ability [ 74 , 75 ]. Doping with N and Cu (Cu-NBC) is an effective way to prepare high-efficiency biochar-based catalysts.…”

Section: Preparation and Modification Of Nbcmentioning

confidence: 99%

“…In recent years, many researchers have demonstrated that Fe and N co-doped biochars (Fe-NBCs) have high catalytic performance in PS-AOP [ 74 , 77 , 78 , 79 , 80 ]. As shown in Figure 2 , Xu et al [ 78 ] used dicyandiamide as the N source and FeCl 3 as the iron source, respectively, and then heated, stirred, and dried with sawdust in water to obtain Fe-NBC.…”

Section: Preparation and Modification Of Nbcmentioning

confidence: 99%

“…Wu et al [ 82 ] studied sludge from different sources and found that the municipal sewage sludge is rich in metals and other insoluble substances. In the process of preparing Fe-NBCs from municipal sewage sludge, Fu et al [ 74 ] used ethylene diamine tetraacetic acid (EDTA)-citric acid for pretreatment to recover the heavy metals in the sludge. Therefore, for the sludge extracted from urban domestic sewage, it is necessary to pay attention to the risk of metal overflow if mixed with metal elements.…”

Section: Preparation and Modification Of Nbcmentioning

confidence: 99%

“…Different from NBCs, the free-radical pathway in modified NBCs plays a more important role in the PS-AOP. Fu et al [ 74 ] prepared iron species self-doped biochar derived from municipal sludge by a simple method of EDTA-citric acid leaching/pyrolysis, exploring an efficient PMS activation method for perfluorooctanoic acid (PFOA) degradation. As can be seen in Figure 4 , element mapping was used to prove that there was a uniform distribution of iron on the surface of iron self-doped of sludge-derived biochar (ISBC), and the changes in Fe 2+ and Fe 3+ contents before and after catalysis confirmed that iron species induced free radicals to participate in PS-AOP as follows (Equations (12)–(15)).…”

Section: Catalytic Performance Of Nbc On Persulfate Activation and Th...mentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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A Review on N-Doped Biochar for Oxidative Degradation of Organic Contaminants in Wastewater by Persulfate Activation

Gao

Zhu

et al. 2022

IJERPH

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The Persulfate-based advanced oxidation process is the most efficient and commonly used technology to remove organic contaminants in wastewater. Due to the large surface area, unique electronic properties, abundant N functional groups, cost-effectiveness, and environmental friendliness, N-doped biochars (NBCs) are widely used as catalysts for persulfate activation. This review focuses on the NBC for oxidative degradation of organics-contaminated wastewater. Firstly, the preparation and modification methods of NBCs were reviewed. Then the catalytic performance of NBCs and modified NBCs on the oxidation degradation of organic contaminants were discussed with an emphasis on the degradation mechanism. We further summarized the detection technologies of activation mechanisms and the structures of NBCs affecting the PS activation, followed by the specific role of the N configuration of the NBC on its catalytic capacity. Finally, several challenges in the treatment of organics-contaminated wastewater by a persulfate-based advanced oxidation process were put forward and the recommendations for future research were proposed for further understanding of the advanced oxidation process activated by the NBC.

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Section: Preparation and Modification Of Nbcmentioning

confidence: 99%

Section: Preparation and Modification Of Nbcmentioning

confidence: 99%

Section: Preparation and Modification Of Nbcmentioning

confidence: 99%

Section: Catalytic Performance Of Nbc On Persulfate Activation and Th...mentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

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A Review on N-Doped Biochar for Oxidative Degradation of Organic Contaminants in Wastewater by Persulfate Activation

Gao

Zhu

et al. 2022

IJERPH

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Peroxide‐Based Biochar‐Assisted Advanced Oxidation

Cao,

Zhang,

Sun

et al. 2023

Biochar Applications for Wastewater Treatment

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Mesoporous Ultrathin g‐C₃N₄ with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism

Song

Zhang

et al. 2022

Advanced Sustainable Systems

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Metal‐free catalysts combined with a persulfate‐based advanced oxidation process (PS‐AOP) are considered to be a promising purification technology. In this study, porous thin layers of g‐C3N4 with nitrogen defects are synthesized by a simple method. Multiple characterization methods demonstrate the porous thin layer structure and the N defects of P‐CNx‐1. Photoelectrochemistry tests show that the combination of morphological modulation and defect engineering produces an excellent photocurrent response. The P‐CNx‐1/PS/Vis system shows the best tetracycline (TC) removal efficiency degrading 74.2% of TC within 90 min, and the degradation kinetics are significantly improved. Optimal degradation conditions such as catalyst dosage, persulfate (PS) dosage, initial TC concentration, and initial pH are investigated. Cyclic and anionic experiments demonstrate the excellent stability of P‐CNx‐1 and its ability to treat complex aqueous bases. Mechanistic experiments show that ˙OH/SO4˙−/˙O2−/h+/1O2 are all involved in the degradation of TC. Liquid chromatography‐mass spectrometry (LC‐MS) suggests possible degradation pathways for TC. This work aims to provide new ideas for the application of metal‐free g‐C3N4 in PS activation.

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Peroxymonosulfate activation by iron self-doped sludge-derived biochar for degradation of perfluorooctanoic acid: A singlet oxygen-dominated nonradical pathway

Cited by 49 publications

References 71 publications

A Review on N-Doped Biochar for Oxidative Degradation of Organic Contaminants in Wastewater by Persulfate Activation

A Review on N-Doped Biochar for Oxidative Degradation of Organic Contaminants in Wastewater by Persulfate Activation

Peroxide‐Based Biochar‐Assisted Advanced Oxidation

Mesoporous Ultrathin g‐C₃N₄ with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism

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Peroxymonosulfate activation by iron self-doped sludge-derived biochar for degradation of perfluorooctanoic acid: A singlet oxygen-dominated nonradical pathway

Cited by 49 publications

References 71 publications

A Review on N-Doped Biochar for Oxidative Degradation of Organic Contaminants in Wastewater by Persulfate Activation

A Review on N-Doped Biochar for Oxidative Degradation of Organic Contaminants in Wastewater by Persulfate Activation

Peroxide‐Based Biochar‐Assisted Advanced Oxidation

Mesoporous Ultrathin g‐C3N4 with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism

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Product

Resources

About

Mesoporous Ultrathin g‐C₃N₄ with Surface Defects Activates Peroxodisulfate for Tetracycline Removal under Visible Light: Synergy and Mechanism