Environmental impacts and remediation of dye-containing wastewater

Nature Reviews Earth & Environment, Journal Year: 2023, Volume and Issue: 4(11), P. 785 - 803

Published: Oct. 26, 2023

Language: Английский

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Oxygen doping of cobalt-single-atom coordination enhances peroxymonosulfate activation and high-valent cobalt–oxo species formation

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(16)

Published: April 11, 2023

The high-valent cobalt-oxo species (Co(IV)=O) is being increasingly investigated for water purification because of its high redox potential, long half-life, and antiinterference properties. However, generation Co(IV)=O inefficient unsustainable. Here, a cobalt-single-atom catalyst with N/O dual coordination was synthesized by O-doping engineering. O-doped (Co-OCN) greatly activated peroxymonosulfate (PMS) achieved pollutant degradation kinetic constant 73.12 min-1 g-2, which 4.9 times higher than that Co-CN (catalyst without O-doping) those most reported single-atom catalytic PMS systems. Co-OCN/PMS realized dominant oxidation pollutants increasing the steady-state concentration (1.03 × 10-10 M) 5.9 compared Co-CN/PMS. A competitive kinetics calculation showed contribution to micropollutant 97.5% during process. Density functional theory calculations influenced charge density (increased Bader transfer from 0.68 0.85 e), optimized electron distribution Co center d-band -1.14 -1.06 eV), enhanced adsorption energy -2.46 -3.03 eV, lowered barrier key reaction intermediate (*O*H2O) formation 1.12 0.98 eV. Co-OCN fabricated on carbon felt flow-through device, continuous efficient removal micropollutants (degradation efficiency >85% after 36 h operation). This study provides new protocol activation elimination through heteroatom-doping metal-oxo purification.

Language: Английский

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Photocatalysts for a sustainable future: Innovations in large-scale environmental and energy applications

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 885, P. 163914 - 163914

Published: May 4, 2023

Language: Английский

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MOF‐Based Photocatalytic Membrane for Water Purification: A Review

Small, Journal Year: 2023, Volume and Issue: 20(1)

Published: Aug. 28, 2023

Abstract Photocatalytic membranes can effectively integrate membrane separation and photocatalytic degradation processes to provide an eco‐friendly solution for efficient water purification. It is of great significance develop highly driven by visible light ensure the long‐term stability systems maximum utilization solar energy. Metal‐organic framework (MOF) emerging photocatalyst with a well‐defined structure tunable chemical properties, showing broad application prospect in construction high‐performance membranes. Herein, this work provides comprehensive review recent advancements MOF‐based Initially, outlines main tailoring strategies that facilitate enhancement activity photocatalysts. Next, introduces commonly used methods fabricating Subsequently, discusses mechanisms toward organic pollutant degradation, metal ion removal, fouling mitigation. Finally, challenges developing their practical applications are presented, while also pointing out future research directions overcoming these existing limitations.

Language: Английский

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Recent progress in CdS-based S-scheme photocatalysts

Journal of Material Science and Technology, Journal Year: 2023, Volume and Issue: 171, P. 162 - 184

Published: Aug. 12, 2023

Language: Английский

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Steroid hormones in wastewater: Sources, treatments, environmental risks, and regulations

Emerging contaminants, Journal Year: 2023, Volume and Issue: 9(2), P. 100210 - 100210

Published: Feb. 3, 2023

Steroid hormones are micropollutants that contaminate the water worldwide and exhibit a significant threat to human health environment even at low concentrations. among most common endocrine disruptors investigated due their widespread use as active ingredients in hormonal treatments natural secretions. Three main types of steroids critical for development multiorgan homeostasis estrogens, progesterone, androgens. The sources steroid livestock excretion, veterinary medicines, agricultural runoff, pharmaceuticals. When they reach environment, effects on detrimental. Therefore, this review discusses sources, efficiency available wastewater treatment techniques remove these from wastewater, potential environmental risks, international standards regulate them. This concludes different emerging hybrid approaches show best efficiencies hormone removal wastewater. Moreover, studies have focused estrogen, but equal attention research should also be given progesterone androgen. national need more detailed guidelines encourage advanced systems. Overall, many modern technologies treatments, there is still gap make them sustainable, environmentally safe, cost-efficient.

Language: Английский

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Super‐Photothermal Effect‐Mediated Fast Reaction Kinetic in S‐Scheme Organic/Inorganic Heterojunction Hollow Spheres Toward Optimized Photocatalytic Performance

Small, Journal Year: 2023, Volume and Issue: 19(23)

Published: March 10, 2023

Using full solar spectrum for energy conversion and environmental remediation is a major challenge, solar-driven photothermal chemistry promising route to achieve this goal. Herein, work reports nano-constrained reactor based on hollow structured g-C3 N4 @ZnIn2 S4 core-shell S-scheme heterojunction, where the synergistic effect of super-photothermal heterostructure significantly improve photocatalytic performance . The formation mechanism predicted in advance by theoretical calculations advanced techniques, its contribution near-field chemical reaction confirmed numerical simulations infrared thermography. Consequently, degradation rate tetracycline hydrochloride 99.3%, hydrogen production up 4075.65 µmol h-1 g-1 , which are 6.94 30.87 times those pure respectively. combination heterojunction thermal synergism provides insight design an efficient platform.

Language: Английский

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Engineering In Situ Catalytic Cleaning Membrane Via Prebiotic‐Chemistry‐Inspired Mineralization

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(49)

Published: Oct. 3, 2023

Pressure-driven membrane separation promises a sustainable energy-water nexus but is hindered by ubiquitous fouling. Natural systems evolved from prebiotic chemistry offer glimpse of creative solutions. Herein, prebiotic-chemistry-inspired aminomalononitrile (AMN)/Mn2+ -mediated mineralization method reported for universally engineering superhydrophilic hierarchical MnO2 nanocoating to endow hydrophobic polymeric membranes with exceptional catalytic cleaning ability. Green hydrogen peroxide catalytically triggered in-situ the mineralized and enabled operando flux recovery reach 99.8%. The exhibited 9-fold higher compared unmineralized membrane, which attributed active antifouling coupled passive hydration antifouling. Electron density differences derived precursor interaction during mediated unveiled an electron-rich bell-like structure inner electron-deficient Mn core. This work paves way construct multifunctional engineered materials energy-efficient water treatment as well diverse promising applications in catalysis, solar steam generation, biomedicine, beyond.

Language: Английский

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A critical and comprehensive review of the current status of 17β-estradiol hormone remediation through adsorption technology

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(17), P. 24679 - 24712

Published: March 15, 2024

Language: Английский

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Methyl contributes to the directed phosphorus doping of g-C3N4: pH-dependent selective reactive oxygen species enable customized degradation of organic pollutants

Water Research, Journal Year: 2024, Volume and Issue: 255, P. 121521 - 121521

Published: March 24, 2024

Language: Английский

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