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Photocatalytic degradation of sulfa drugs with TiO2, Fe salts and TiO2/FeCl3 in aquatic environment—Kinetics and degradation pathway

Paper ID Volume ID Publish Year Pages File Format Full-Text
47660 46479 2009 10 PDF Available
Title
Photocatalytic degradation of sulfa drugs with TiO2, Fe salts and TiO2/FeCl3 in aquatic environment—Kinetics and degradation pathway
Abstract

The photocatalytic degradation of sulfanilamide, sulfacetamide, sulfathiazole, sulfamethoxazole and sulfadiazine in aqueous solutions was examined during their irradiation with UV-A (366 nm) with TiO2, Fe salts and TiO2/FeCl3 catalysts. The study was carried out by HPLC-UV, HPLC/MS-EI and total organic carbon (TOC) methods.It was found that sulfonamides underwent photocatalytic degradation in the presence of TiO2, TiO2/FeCl3 and Fe3+ salts, and the optimum catalyst for this process can be FeCl3. Based on the identified intermediate products, a degradation pathway was proposed. Moreover, the rate of photocatalytic process carried out with FeCl3 as well as the relationship between the pH of irradiated solutions, initial concentrations of sulfanilamide and FeCl3 were stated.

Keywords
Sulfonamides; Photocatalytic degradation; Photocatalysis; Micro-pollutants
First Page Preview
Photocatalytic degradation of sulfa drugs with TiO2, Fe salts and TiO2/FeCl3 in aquatic environment—Kinetics and degradation pathway
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 90, Issues 3–4, 17 August 2009, Pages 516–525
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis