Evaluation of the Efficiency of Detection and Capture of Manganese in Aqueous Solutions of FeCeOx Nanocomposites Doped with Nb2O5

Sensors, Journal Year: 2020, Volume and Issue: 20(17), P. 4851 - 4851

Published: Aug. 27, 2020

: The main purpose of this work is to study the effectiveness using FeCeOx nanocomposites doped with Nb2O5 for purification aqueous solutions from manganese. X-ray diffraction, energy-dispersive analysis, scanning electron microscopy, vibrational magnetic spectroscopy, and mössbauer spectroscopy were used as research methods. It shown that an increase in dopant concentration leads transformation shape nanoparticles spherical cubic rhombic, followed by size nanoparticles. characteristic a structure consisting mixture two phases hematite (Fe2O3) cerium oxide CeO2. typical spinel-type FeNbO4 structures, phase contribution which increases increasing concentration. doping not only decrease manganese model solutions, but also efficiency adsorption 11% 75%.

Language: Английский

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Defect Engineering on a Ti₄O₇ Electrode by Ce³⁺ Doping for the Efficient Electrooxidation of Perfluorooctanesulfonate

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(4), P. 2597 - 2607

Published: Jan. 27, 2021

Defect engineering in an electrocatalyst, such as doping, has the potential to significantly enhance its catalytic activity and stability. Herein, we report use of a defect strategy electrochemical reactivity Ti4O7 through Ce3+ doping (1-3 at. %), resulting accelerated interfacial charge transfer yielding 37-129% increase anodic production hydroxyl radical (OH•). The Ce3+-doped electrodes, [(Ti1-xCex)4O7], also exhibited more stable electrocatalytic than pristine electrode so facilitate long-term operation. Furthermore, (Ti1-xCex)4O7 electrodes were shown effectively mineralize perfluorooctanesulfonate (PFOS) electrooxidation processes both trace-concentration river water sample simulated preconcentration waste stream sample. A 3 % dopant amount resulted PFOS oxidation rate 2.4× greater that electrode. X-ray photoelectron spectroscopy results suggest created surficial oxygen vacancies may be responsible for enhanced stability electrodes. Results this study provide insights into boosting performance with robust

Language: Английский

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A Critical Review on Removal of Gaseous Pollutants Using Sulfate Radical-based Advanced Oxidation Technologies

Environmental Science & Technology, Journal Year: 2021, Volume and Issue: 55(14), P. 9691 - 9710

Published: June 30, 2021

Excessive emissions of gaseous pollutants such as SO2, NOx, heavy metals (Hg, As, etc.), H2S, VOCs, etc. have triggered a series environmental pollution incidents. Sulfate radical (SO4•–)-based advanced oxidation technologies (AOTs) are one the most promising removal because they can not only produce active free radicals with strong ability to simultaneously degrade pollutants, but also their reaction processes environmentally friendly. However, so far, special review focusing on using SO4•–-based AOTs is reported. This reports latest advances in (e.g., Hg, and VOCs) AOTs. The performance, mechanism, species identification advantages/disadvantages these reviewed. existing challenges further research suggestions commented. Results show that possess good development potential pollutant control field due simple reagent transportation storage, low product post-treatment requirements degradation refractory pollutants. Each AOT possesses its own advantages disadvantages terms cost, reliability, post-treatment. Low yield, poor capacity, unclear mechanism/contribution species, unreliable technology high cost still main problems this field. combined use multiactivation strategies overcome defects since it may make up for shortcomings independent technology. In order improve yield enhancement mass transfer optimization design reactor critical issues. Comprehensive consideration catalytic materials, chemistry, route solve problems. clarify essential select suitable sacrificial agents, probes spin trapping which selectivity target specie, solubility water, little effect activity catalyst itself transfer/diffusion parameters. reduce investment operating costs, necessary carry out related studies simultaneous more

Language: Английский

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Emerging pollutants and their removal using visible-light responsive photocatalysis – A comprehensive review

Journal of environmental chemical engineering, Journal Year: 2021, Volume and Issue: 9(6), P. 106643 - 106643

Published: Oct. 25, 2021

Language: Английский

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Recent Advancement in Nanotechnology for the Treatment of Pharmaceutical Wastewater: Sources, Toxicity, and Remediation Technology

Current Pollution Reports, Journal Year: 2023, Volume and Issue: 9(2), P. 110 - 142

Published: March 11, 2023

Language: Английский

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Solar light driven degradation of textile dye contaminants for wastewater treatment – studies of novel polycationic selenide photocatalyst and process optimization by response surface methodology desirability factor

Chemosphere, Journal Year: 2023, Volume and Issue: 328, P. 138476 - 138476

Published: March 22, 2023

Language: Английский

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New insights into adsorption of As(V) and Sb(V) from aqueous by HCO–(Fe3O4)x adsorbent: Adsorption behaviors, competition and mechanisms

Journal of Water Process Engineering, Journal Year: 2024, Volume and Issue: 58, P. 104873 - 104873

Published: Jan. 31, 2024

Language: Английский

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Preparation, characterization, and applications of Fe-based catalysts in advanced oxidation processes for organics removal: A review

Environmental Pollution, Journal Year: 2021, Volume and Issue: 293, P. 118565 - 118565

Published: Nov. 23, 2021

Language: Английский

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A critical review on ozone and co-species, generation and reaction mechanisms in plasma induced by dielectric barrier discharge technologies for wastewater remediation

Journal of environmental chemical engineering, Journal Year: 2021, Volume and Issue: 9(5), P. 105758 - 105758

Published: June 1, 2021

Language: Английский

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Oxygen vacancies enhancing performance of Mg-Co-Ce oxide composite for the selective catalytic ozonation of ammonia in water

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 436, P. 129000 - 129000

Published: April 25, 2022

Language: Английский

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