Photocatalytic Oxidation of Five Contaminants of Emerging Concern by UV/TiO2: Identification of Intermediates and Degradation Pathways

2016 ◽  
Vol 33 (2) ◽  
pp. 140-147 ◽  
Author(s):  
Jose R. Alvarez-Corena ◽  
John A. Bergendahl ◽  
Fred L. Hart
Keyword(s):  
Photocatalytic Oxidation ◽  
Degradation Pathways ◽  
Contaminants Of Emerging Concern

scholarly journals Effect of Different Radiation Sources and Noble Metal Doped onto TiO2 for Contaminants of Emerging Concern Removal

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 894 ◽  
Author(s):  
Rui C. Martins ◽  
Eva Domingues ◽  
Morgana Bosio ◽  
Margarida J. Quina ◽  
Marta Gmurek ◽  
...  
Keyword(s):  
Noble Metal ◽  
Photocatalytic Oxidation ◽  
Kinetic Constant ◽  
Contaminants Of Emerging Concern ◽  
Order Kinetic ◽  
Visible Radiation ◽  
High Production ◽  
Metal Doped ◽  
The Impact ◽  
Sunlight Radiation

Water scarcity is a worldwide problem boosted by global warming and pollution of anthropogenic origin. The contaminants of emerging concern in water sources are increasing due to the inefficiency of conventional wastewater treatments, and these should be mitigated. Advanced oxidation processes appear as suitable solutions for decontamination. The photocatalytic oxidation of the mixture of sulfamethoxazole, carbamazepine and lorazepam was investigated. TiO2 modified by Ag and TiO2 modified by Pd were used as photocatalysts to improve photoactivity. The impact of light wavelengths was examined using UVA and visible radiation as well as natural sunlight. Visible light revealed the lowest ability for decontamination in 60 min of irradiation through Ag and Pd–TiO2 photocatalytic oxidation. On the other hand, UVA and sunlight in the presence of photocatalysts were able to totally remove the contaminants. This can be related to the high production of reactive oxidative species at those conditions. The increase of the noble metal load promotes the improvement of the decontamination efficiency. The kinetic rate was analyzed for UVA and sunlight radiation for different photocatalytic conditions. The presence of a natural light source without energy costs leads to an increase in the pseudo-first-order kinetic constant. Sunlight radiation with a suitable photocatalyst can be a very good option for water decontamination.

A novel CuO/Fe2O3/ZnO composite for visible-light assisted photocatalytic oxidation of Bisphenol A: Kinetics, degradation pathways, and toxicity elimination

2020 ◽  
Vol 242 ◽  
pp. 116821 ◽  
Author(s):  
Sakine Shekoohiyan ◽  
Asieh Rahmania ◽  
Masoumeh Chamack ◽  
Gholamreza Moussavi ◽  
Omid Rahmanian ◽  
...  
Keyword(s):  
Bisphenol A ◽  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Degradation Pathways

Kinetics and degradation pathways of photolytic and photocatalytic oxidation of the anthelmintic drug praziquantel

2017 ◽  
Vol 323 ◽  
pp. 500-512 ◽  
Author(s):  
Mirta Čizmić ◽  
Davor Ljubas ◽  
Lidija Ćurković ◽  
Irena Škorić ◽  
Sandra Babić
Keyword(s):  
Photocatalytic Oxidation ◽  
Degradation Pathways ◽  
Anthelmintic Drug

EFFICIENT DEGRADATION OF CLOFIBRIC ACID BY HETEROGENEOUS PHOTOCATALYTIC OXIDATION PROCESS

2019 ◽  
Vol 18 (8) ◽  
pp. 1683-1692 ◽  
Author(s):  
Lidia Favier ◽  
Lacramioara Rusu ◽  
Andrei Ionut Simion ◽  
Raluca Maria Hlihor ◽  
Mariana Liliana Pacala ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Oxidation Process ◽  
Clofibric Acid

KINETIC SORPTION OF CONTAMINANTS OF EMERGING CONCERN BY A PALYGORSKITE-MONTMORILLONITE FILTER MEDIUM

2016 ◽  
Author(s):  
Jonathan Levy ◽  
◽  
Tedros Berhane ◽  
Mark P.S. Krekeler ◽  
Neil Danielson
Keyword(s):  
Filter Medium ◽  
Contaminants Of Emerging Concern ◽  
Kinetic Sorption

scholarly journals Transformation of Contaminants of Emerging Concern (CECs) during UV-Catalyzed Processes Assisted by Chlorine

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1432
Author(s):  
Edyta Kudlek
Keyword(s):  
Hydrogen Peroxide ◽  
Water Samples ◽  
Water Environment ◽  
Toxicity Assessment ◽  
Contaminants Of Emerging Concern ◽  
Post Processing ◽  
Processing Water ◽  
Living Organisms ◽  
Trace Concentrations ◽  
By Products

Every compound that potentially can be harmful to the environment is called a Contaminant of Emerging Concern (CEC). Compounds classified as CECs may undergo different transformations, especially in the water environment. The intermediates formed in this way are considered to be toxic against living organisms even in trace concentrations. We attempted to identify the intermediates formed during single chlorination and UV-catalyzed processes supported by the action of chlorine and hydrogen peroxide or ozone of selected contaminants of emerging concern. The analysis of post-processing water samples containing benzocaine indicated the formation of seven compound intermediates, while ibuprofen, acridine and β-estradiol samples contained 5, 5, and 3 compound decomposition by-products, respectively. The number and also the concentration of the intermediates decreased with the time of UV irradiation. The toxicity assessment indicated that the UV-catalyzed processes lead to decreased toxicity nature of post-processed water solutions.

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