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Degradation of Carbamazepine by Photo(electro)catalysis on Nanostructured TiO2 Meshes: Transformation Products and Reaction Pathways.

Authors :
Franz, Silvia
Falletta, Ermelinda
Arab, Hamed
Murgolo, Sapia
Bestetti, Massimiliano
Mascolo, Giuseppe
Source :
Catalysts (2073-4344); Feb2020, Vol. 10 Issue 2, p169, 1p
Publication Year :
2020

Abstract

Carbamazepine (CBZ) is a pharmaceutical compound recalcitrant to conventional wastewater treatment plants and widely detected in wastewater bodies. In the present study, advanced oxidation processes for carbamazepine removal are investigated, with particular regard to the degradation pathways of carbamazepine by photoelectrocatalysis and conventional photocatalysis. Photoelectrocatalysis was carried out onto TiO<subscript>2</subscript> meshes obtained by Plasma Electrolytic Oxidation, a well-known technique in the field of industrial surface treatments, in view of an easy scale-up of the process. By photoelectrocatalysis, 99% of carbamazepine was removed in 55 min while only 65% removal was achieved by photolysis. The investigation of the transformation products (TPs) was carried out by means of UPLC-QTOF/MS/MS. Several new TPs were identified and accordingly reaction pathways were proposed. Above 80 min the transformation products disappear, probably forming organic acids of low-molecular weight as final degradation products. The results demonstrated that photoelectrocatalysis onto TiO<subscript>2</subscript> meshes obtained by plasma electrolytic oxidation is a useful alternative to common advanced oxidation processes as wastewater tertiary treatment aimed at removing compounds of emerging concern. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20734344
Volume :
10
Issue :
2
Database :
Complementary Index
Journal :
Catalysts (2073-4344)
Publication Type :
Academic Journal
Accession number :
142255761
Full Text :
https://doi.org/10.3390/catal10020169