Toward Selective Oxidation of Contaminants in Aqueous Systems

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(21), P. 14494 - 14514

Published: Oct. 20, 2021

The presence of diverse pollutants in water has been threating human health and aquatic ecosystems on a global scale. For more than century, chemical oxidation using strongly oxidizing species was one the most effective technologies to destruct ensure safe clean supply. However, removal increasing amount with higher structural complexity, especially emerging micropollutants trace concentrations complicated matrix, requires excessive dosage oxidant and/or energy input, resulting low cost-effectiveness possible secondary pollution. Consequently, it is practical significance but scientifically challenging achieve selective interest for decontamination. Currently, there are variety examples concerning aqueous systems. systematic understanding relationship between origin selectivity its applicable treatment scenarios, as well rational design catalyst catalytic oxidation, still lacking. In this critical review, we summarize state-of-the-art strategies decontamination probe origins selectivity, that is, from reactivity either oxidants or target pollutants, arising accessibility via adsorption size exclusion, due interfacial electron transfer process enzymatic oxidation. Finally, challenges perspectives briefly outlined stimulate future discussion decontamination, particularly toward application real scenarios.

Language: Английский

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Oxidative Polymerization in Water Treatment: Chemical Fundamentals and Future Perspectives

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

For several decades, the methodology of complete destruction organic pollutants via oxidation, i.e., mineralization, has been rooted in real water treatment applications. Nevertheless, this industrially accepted protocol is far from sustainable because excessive input chemicals and/or energy as well unregulated carbon emission. Recently, there have emerging studies on removal a completely different pathway, polymerization, meaning that target undergo oxidative polymerization reactions to generate polymeric products. These collectively shown compared conventional mineralization pathway allows more efficient pollutants, largely reduced chemicals, and suppressed In review, we aim provide comprehensive examination fundamentals process, current state-of-the-art strategies for regulation both kinetic thermodynamic perspectives, resource recovery formed end, limitations process pollutant are discussed, with perspectives future studies. Hopefully, review could not only critical insight advancement polymerization-oriented technologies greener manner but also stimulate paradigm innovations low-carbon treatment.

Language: Английский

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Solar-driven interfacial evaporation coupling with photo-Fenton of floating Prussian blue/polypyrrole/paper film for volatile organic compounds-containing wastewater treatment

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 131735 - 131735

Published: Jan. 1, 2025

Language: Английский

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Synergetic Oxidation of the Hydroxyl Radical and Superoxide Anion Lowers the Benzoquinone Intermediate Conversion Barrier and Potentiates Effective Aromatic Pollutant Mineralization

Environmental Science & Technology, Journal Year: 2023, Volume and Issue: 57(32), P. 12117 - 12126

Published: Aug. 1, 2023

Regulation of the free radical types is crucial but challenging in ubiquitous heterogeneous catalytic oxidation for chemosynthesis, biotherapy, and environmental remediation. Here, using aromatic pollutant (AP) removal as a prototype, we identify massive accumulation benzoquinone (BQ) intermediate hydroxyl (•OH)-mediated AP degradation process. Theoretical prediction experiments demonstrate that BQ both Lewis acid base because its unique molecular electronic structure caused by existence symmetrical carbonyl groups; therefore, it hard to be electrophilically added oxidizing •OH result high reaction energy barrier (ΔG = 1.74 eV). Fortunately, introduction superoxide anion (•O2-) significantly lowers conversion 0.91 eV) •O2- can act electron donor acceptor simultaneously, nucleophilically add synchronously, break down. Subsequently, breakdown products then further oxidized until completely mineralized. Such synergistic based on timely eliminates BQ, potentiates mineralization, inhibits electrode fouling high-resistance polymeric BQ; more importantly, effectively reduces toxicity, saves costs, decreases footprint, evidenced life cycle assessment.

Language: Английский

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Porphyrin/phthalocyanine-based porous organic polymers for pollutant removal and detection: Synthesis, mechanisms, and challenges

Environmental Research, Journal Year: 2023, Volume and Issue: 239, P. 117406 - 117406

Published: Oct. 14, 2023

Language: Английский

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Synthesis of high crystallinity g-C3N4 hollow spheres for efficient photocatalytic removal of U(VI) under visible light

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 324, P. 124235 - 124235

Published: June 1, 2023

Language: Английский

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Instructive analysis of engineered carbon materials for potential application in water and wastewater treatment

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 793, P. 148583 - 148583

Published: June 24, 2021

Language: Английский

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New insights into enhanced biodegradation of 4-bromphenol in a nitrate-reducing system: Process performance and mechanism

Water Research, Journal Year: 2023, Volume and Issue: 242, P. 120200 - 120200

Published: June 8, 2023

Language: Английский

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Exciton dissociation and electron transfer behavior of a novel Donor-Acceptor g-C3N4 organic semiconductor photocatalytic separation of uranium

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 318, P. 123918 - 123918

Published: April 25, 2023

Language: Английский

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Conversion of Human Neuroglobin into a Multifunctional Peroxidase by Rational Design

Inorganic Chemistry, Journal Year: 2021, Volume and Issue: 60(4), P. 2839 - 2845

Published: Feb. 4, 2021

Protein design has received much attention in the last decades. With an additional disulfide bond to enhance protein stability, human A15C neuroglobin (Ngb) is ideal scaffold for heme enzyme design. In this study, we rationally converted Ngb into a multifunctional peroxidase by replacing axial His64 with Asp residue, where Asp64 and native Lys67 at distal site were proposed act as acid–base catalytic couple H2O2 activation. Kinetic studies showed that efficiency of A15C/H64D was higher (∼50–80-fold) than dehaloperoxidase, which even exceeds (∼3-fold) most efficient horseradish peroxidase. Moreover, dye-decolorizing activity also comparable some enzymes. Electron paramagnetic resonance, molecular docking, isothermal titration calorimetry provided valuable information substrate–protein interactions. Therefore, study presents rational based on potential applications such bioremediation environmental sustainability.

Language: Английский

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