Degradation of Carbamazepine from Aqueous Solutions via TiO₂-Assisted Photo Catalyze.

ABSTRACT: Photocatalytic degradation of carbamazepine (CBZ) from spiked aqueous solutions, via a UV/TiO₂ system, was investigated, and the optimum photocatalyst type (P25 Degussa) and dose (500 mg/L), as well as irradiation time (45 min), were established. The degradation process kinetics was studied, and a degradation rate constant of 3.14 × 10^-5 M min^-1 was calculated for CBZ, using the Langmuir-Hinshelwood equation. Experiments performed in the presence of scavengers showed that the main reactive species involved in the degradation process are holes and free hydroxyl radicals; superoxide radicals also play a role in CBZ degradation. Eight transformation products of CBZ were identified, and a possible degradation pathway, consisting of four routes, was proposed. To

SUBMITTER: Constantin MA 

PROVIDER: S-EPMC9032724 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature