scholarly journals Nanostructured modified layered double hydroxides (LDHs)-based catalysts: A review on synthesis, characterization, and applications in water remediation by advanced oxidation processes

2022 ◽  
Vol 26 (1) ◽  
pp. 100965
Author(s):  
Ansaf V. Karim ◽  
Aydin Hassani ◽  
Paria Eghbali ◽  
P.V. Nidheesh
Keyword(s):  
Layered Double Hydroxides ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Water Remediation ◽  
Oxidation Processes ◽  
Double Hydroxides

Advanced oxidation processes using catalytic nanomaterials for air and water remediation

2020 ◽  
pp. 167-192
Author(s):  
Ivana Jaciw-Zurakowsky ◽  
Monika R. Snowdon ◽  
Olivia M. Schneider ◽  
Y. Norman Zhou ◽  
Robert L. Liang
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Water Remediation ◽  
Oxidation Processes

scholarly journals CeO2 for Water Remediation: Comparison of Various Advanced Oxidation Processes

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 446 ◽  
Author(s):  
Roberto Fiorenza ◽  
Stefano Andrea Balsamo ◽  
Luisa D’Urso ◽  
Salvatore Sciré ◽  
Maria Violetta Brundo ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Advanced Oxidation Processes ◽  
Chemical Properties ◽  
Advanced Oxidation ◽  
Chemical Precipitation ◽  
Water Remediation ◽  
Solar Irradiation ◽  
Oxidation Processes ◽  
Physico Chemical ◽  
Exposed Surface Area

Three different Advanced Oxidation Processes (AOPs) have been investigated for the degradation of the imidacloprid pesticide in water: photocatalysis, Fenton and photo-Fenton reactions. For these tests, we have compared the performance of two types of CeO2, employed as a non-conventional photocatalyst/Fenton-like material. The first one has been prepared by chemical precipitation with KOH, while the second one has been obtained by exposing the as-synthetized CeO2 to solar irradiation in H2 stream. This latter treatment led to obtain a more defective CeO2 (coded as “grey CeO2”) with the formation of Ce3+ sites on the surface of CeO2, as determined by Raman and X-ray Photoelectron Spectroscopy (XPS) characterizations. This peculiar feature has been demonstrated as beneficial for the solar photo–Fenton reaction, with the best performance exhibited by the grey CeO2. On the contrary, the bare CeO2 showed a photocatalytic activity higher with respect to the grey CeO2, due to the higher exposed surface area and the lower band-gap. The easy synthetic procedures of CeO2 reported here, allows to tune and modify the physico-chemical properties of CeO2, allowing a choice of different CeO2 samples on the basis of the specific AOPs for water remediation. Furthermore, neither of the samples have shown any critical toxicity.

scholarly journals Simulated Ageing of Crude Oil and Advanced Oxidation Processes for Water Remediation since Crude Oil Pollution

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 954
Author(s):  
Filomena Lelario ◽  
Giuliana Bianco ◽  
Sabino Aurelio Bufo ◽  
Laura Scrano
Keyword(s):  
Crude Oil ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Water Soluble ◽  
Water Remediation ◽  
Solar Irradiation ◽  
Polluted Water ◽  
Slight Reduction ◽  
Artificial Ageing ◽  
Oxidation Processes

Crude oil can undergo biotic and abiotic transformation processes in the environment. This article deals with the fate of an Italian crude oil under simulated solar irradiation to understand (i) the modification induced on its composition by artificial ageing and (ii) the transformations arising from different advanced oxidation processes (AOPs) applied as oil-polluted water remediation methods. The AOPs adopted were photocatalysis, sonolysis and, simultaneously, photocatalysis and sonolysis (sonophotocatalysis). Crude oil and its water-soluble fractions underwent analysis using GC-MS, liquid-state 1H-NMR, Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), and fluorescence. The crude oil after light irradiation showed (i) significant modifications induced by the artificial ageing on its composition and (ii) the formation of potentially toxic substances. The treatment produced oil oxidation with a particular effect of double bonds oxygenation. Non-polar compounds present in the water-soluble oil fraction showed a strong presence of branched alkanes and a good amount of linear and aromatic alkanes. All remediation methods utilised generated an increase of C5 class and a decrease of C6–C9 types of compounds. The analysis of polar molecules elucidated that oxygenated compounds underwent a slight reduction after photocatalysis and a sharp decline after sonophotocatalytic degradation. Significant modifications did not occur by sonolysis.

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