Heterogeneous activation of persulfate by metal and non-metal catalyst for the degradation of sulfamethoxazole: A review

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 437, P. 135277 - 135277

Published: Feb. 16, 2022

Language: Английский

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Selective Degradation of Electron-Rich Organic Pollutants Induced by CuO@Biochar: The Key Role of Outer-Sphere Interaction and Singlet Oxygen

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(15), P. 10710 - 10720

Published: May 12, 2022

Efficient degradation of organic pollutants by oxidative radicals is challenging in the complex soil environment because invalid consumption nontarget background substances and generation secondary halogenated pollutants. Nonradical-based oxidation a promising pollutant removal method due to its high selectivity environmental adaptability. Herein, biochar-supported sheetlike CuO (e-CuO@BC) was developed, which exhibited efficient activation peroxydisulfate (PDS) via nonradical pathways. The mechanisms were identified as (i) formation surface-bonding active complexes an outer-sphere interaction between e-CuO@BC PDS (ii) continuous 1O2 cycling Cu(I)/Cu(II) redox couple. In addition, primarily occurred at crystal facet (001) e-CuO occupied Cu atoms well facilitated Cu–O–C bond, induced electron-rich centers around CuO. Two species from activation, including 1O2, showed highly selective toward Moreover, mineralization effective inhibition on toxic byproducts (i.e., organics) indicated intermediate final products. This study provides comprehensive understanding heterogeneous process PS catalyst for removal.

Language: Английский

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A critical review on correlating active sites, oxidative species and degradation routes with persulfate-based antibiotics oxidation

Water Research, Journal Year: 2023, Volume and Issue: 235, P. 119926 - 119926

Published: March 27, 2023

Language: Английский

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Heterogeneous Photocatalytic Activation of Persulfate for the Removal of Organic Contaminants in Water: A Critical Review

ACS ES&T Engineering, Journal Year: 2022, Volume and Issue: 2(4), P. 527 - 546

Published: March 8, 2022

Heterogeneous photocatalytic persulfate (PS) activation technologies are being intensively studied for water treatment due to their friendly environmental benefits and photosynergistic effect in comparison with traditional PS systems. Previous reviews have summarized diverse methods the role of light systems, but it is still urgent provide a comprehensive review on deep understanding rational design heterogeneous PS-based advanced oxidation processes (AOPs). This intends thoroughly address in-depth fundamentals mechanisms PS-AOPs. Challenges improvement strategies PS-AOPs also critically discussed. On basis detailed survey published studies, PS-AOPs, including Fe-based, TiO2-based, other metal based, bimetallic, metal-free carefully clarified. Finally, engineering implications prospects enumerated developing efficient environmentally treatment. It expected that this will motivate researchers construct novel promising

Language: Английский

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Single-atom copper embedded in two-dimensional MXene toward peroxymonosulfate activation to generate singlet oxygen with nearly 100% selectivity for enhanced Fenton-like reactions

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 324, P. 122245 - 122245

Published: Dec. 1, 2022

Language: Английский

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Remediation of environmentally persistent organic pollutants (POPs) by persulfates oxidation system (PS): A review

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 863, P. 160818 - 160818

Published: Dec. 8, 2022

Language: Английский

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EPR Evidence for Mechanistic Diversity of Cu(II)/Peroxygen Oxidation Systems by Tracing the Origin of DMPO Spin Adducts

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(12), P. 8796 - 8806

Published: May 24, 2022

Electron paramagnetic resonance (EPR) has been extensively used for the identification of free radicals that are generated from advanced oxidation processes (AOPs) so as to establish reaction mechanism. However, some misinterpretations or controversies on identity detected EPR signals remain in literature. This study, with Cu(II)-based AOPs examples, comprehensively investigated origin 5,5-dimethyl-l-pyrroline N-oxide (DMPO) adducts Cu(II) alone, Cu(II)/H2O2, Cu(II)/peroxymonosulfate (PMS), and Cu(II)/peroxydisulfate (PDS) systems. In most systems, DMPO-OH can be even without any peroxygens, indicating presence other origins this adduct addition genuine spin trapping •OH by DMPO. According formed secondary radical (DMPO-OCH3 a nonradical process DMPO-CH2OH oxidation) derived methanol quenching, we propose CuO+, instead radicals, is involved Cu(II)/PMS system, while indeed Cu(II)/H2O2 Cu(II)/PDS systems under neutral conditions. Notably, 17O-incorporation experiments demonstrate -OH originates 100% water alone system but amount over 99.8% oxidant peroxygens added. addition, DMPO-O2- appears only highly alkaline conditions H2O not superoxide formation.

Language: Английский

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Application of sulfate radicals-based advanced oxidation technology in degradation of trace organic contaminants (TrOCs): Recent advances and prospects

Journal of Environmental Management, Journal Year: 2022, Volume and Issue: 308, P. 114664 - 114664

Published: Feb. 8, 2022

Language: Английский

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Catalytic persulfate activation for oxidation of organic pollutants: A critical review on mechanisms and controversies

Journal of environmental chemical engineering, Journal Year: 2022, Volume and Issue: 10(3), P. 107654 - 107654

Published: April 6, 2022

Language: Английский

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Were Persulfate-Based Advanced Oxidation Processes Really Understood? Basic Concepts, Cognitive Biases, and Experimental Details

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(24), P. 10415 - 10444

Published: June 7, 2024

Persulfate (PS)-based advanced oxidation processes (AOPs) for pollutant removal have attracted extensive interest, but some controversies about the identification of reactive species were usually observed. This critical review aims to comprehensively introduce basic concepts and rectify cognitive biases appeals pay more attention experimental details in PS-AOPs, so as accurately explore reaction mechanisms. The scientifically summarizes character, generation, different species. It then highlights complexities analysis electron paramagnetic resonance, uncertainties use probes scavengers, necessities determination scavenger concentration. importance choice buffer solution, operating mode, terminator, filter membrane is also emphasized. Finally, we discuss current challenges future perspectives alleviate misinterpretations toward mechanisms PS-AOPs.

Language: Английский

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