Degradation mechanism of fipronil and its transformation products, matrix effects and toxicity during the solar/photo-Fenton process using ferric citrate complex

2020 ◽  
Vol 269 ◽  
pp. 110756 ◽  
Author(s):  
Oswaldo Gomes Júnior ◽  
Letícia L. Batista ◽  
Carlos Ueira-Vieira ◽  
Raquel M.F. Sousa ◽  
Maria Clara V.M. Starling ◽  
...  
Keyword(s):  
Matrix Effects ◽  
Degradation Mechanism ◽  
Transformation Products ◽  
Ferric Citrate ◽  
Fenton Process ◽  
Citrate Complex

Chemical safety assessment of transformation products of landfill leachate formed during the Fenton process

2021 ◽  
pp. 126438
Author(s):  
Luana de Morais e Silva ◽  
Vinicius M. Alves ◽  
Edilma R.B. Dantas ◽  
Luciana Scotti ◽  
Wilton Silva Lopes ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Safety Assessment ◽  
Transformation Products ◽  
Fenton Process ◽  
Chemical Safety

Oxidative water treatment: Formation of transformation products, matrix effects and the ecotoxicological relevance

Vom Wasser ◽  
2021 ◽  
Vol 119 (3) ◽  
pp. 97-100
Author(s):  
V. Wirzberger ◽  
M. Klein ◽  
V. I. Merkus ◽  
M. Woermann ◽  
L. L. Hohrenk‐Danzouma ◽  
...  
Keyword(s):  
Water Treatment ◽  
Matrix Effects ◽  
Transformation Products

Electrocatalytic properties of N-doped graphite felt in electro-Fenton process and degradation mechanism of levofloxacin

Chemosphere ◽  
2017 ◽  
Vol 182 ◽  
pp. 306-315 ◽  
Author(s):  
Xiaocheng Liu ◽  
Danxing Yang ◽  
Yaoyu Zhou ◽  
Jiachao Zhang ◽  
Lin Luo ◽  
...  
Keyword(s):  
Degradation Mechanism ◽  
Fenton Process ◽  
Electrocatalytic Properties ◽  
Graphite Felt

Activated sludge treatment by electro-Fenton process: Parameter optimization and degradation mechanism

2015 ◽  
Vol 32 (8) ◽  
pp. 1570-1577 ◽  
Author(s):  
Ali Reza Rahmani ◽  
Davood Nematollahi ◽  
Ghasem Azarian ◽  
Kazem Godini ◽  
Zohreh Berizi
Keyword(s):  
Activated Sludge ◽  
Parameter Optimization ◽  
Degradation Mechanism ◽  
Process Parameter ◽  
Fenton Process ◽  
Sludge Treatment ◽  
Process Parameter Optimization

Proposal of a new, fast, cheap, and easy method using DLLME for extraction and preconcentration of diazepam and its transformation products generated by a solar photo-Fenton process

2020 ◽  
Vol 184 ◽  
pp. 116183
Author(s):  
Raquel Wielens Becker ◽  
Marcelo Luís Wilde ◽  
Débora Salmoria Araújo ◽  
Diogo Seibert Lüdtke ◽  
Carla Sirtori
Keyword(s):  
Transformation Products ◽  
Fenton Process ◽  
Easy Method

Bacterial inactivation with iron citrate complex: A new source of dissolved iron in solar photo-Fenton process at near-neutral and alkaline pH

2016 ◽  
Vol 180 ◽  
pp. 379-390 ◽  
Author(s):  
Cristina Ruales-Lonfat ◽  
José Fernando Barona ◽  
Andrzej Sienkiewicz ◽  
Julia Vélez ◽  
Luis Norberto Benítez ◽  
...  
Keyword(s):  
Bacterial Inactivation ◽  
Fenton Process ◽  
Alkaline Ph ◽  
Iron Citrate ◽  
Dissolved Iron ◽  
Citrate Complex

scholarly journals Degradation of enoxacin antibiotic by the electro-Fenton process: Optimization, biodegradability improvement and degradation mechanism

2016 ◽  
Vol 165 ◽  
pp. 96-105 ◽  
Author(s):  
Cyrine Annabi ◽  
Florence Fourcade ◽  
Isabelle Soutrel ◽  
Florence Geneste ◽  
Didier Floner ◽  
...  
Keyword(s):  
Process Optimization ◽  
Degradation Mechanism ◽  
Fenton Process ◽  
Biodegradability Improvement

scholarly journals Photodegradation of methotrexate in aqueous solution: degradation kinetics and identification of transformation products

2021 ◽  
Author(s):  
Anaïs Espinosa ◽  
Sylvie Nélieu ◽  
Pascale Lieben ◽  
Charles Skarbek ◽  
Raphaël Labruère ◽  
...  
Keyword(s):  
Glutamic Acid ◽  
Environmental Concern ◽  
Degradation Kinetics ◽  
Degradation Mechanism ◽  
Parent Compound ◽  
Drinking Water Treatment ◽  
Transformation Products ◽  
Quantum Yields ◽  
Acid Oxidation ◽  
Ionization State

Abstract Methotrexate is an antineoplastic folate analog of high environmental concern, due to its low biodegradability and toxicological properties. This study focused on its photodegradation under two irradiation conditions, aiming to be representative of environment (300–450 nm) and drinking water treatment (254 nm). The photodegradation experiments were conducted at two pH, to vary the methotrexate ionization state and to produce a large variety of transformation products (TPs). The degradation kinetics determined through LC-UV monitoring were contrasted according to pH and irradiation wavelength. However, the quantum yields were independent of ionization state at 254 nm and the changes in kinetics at higher wavelengths were attributed to a change in the degradation mechanism. The TPs formed during the reactions were identified by UHPLC-MS/MS, using both the positive and negative modes. Among the eleven proposed structures, five were described as methotrexate TPs for the first time. The TPs result from N-demethylation, glutamic acid oxidation and C-N cleavage, all of them leading to further degraded photoproducts presenting modified or lost glutamic acid part. This was made possible thanks to the negative mode, which allowed the exploration of the glutamic acid moiety modifications. Cytotoxicity assessment on A549 cancer cells demonstrated that all photoproducts formed at pH 7 were less toxic than the parent compound.

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