Atrazine Toxicity Reduction Following H2O2/TiO2-Photocatalyzed Reaction and Comparison with H2O2-Photolytic Reaction

✍ Scribed by Luigi Campanella; Rosa Vitaliano

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 288 KB
• Volume: 97
• Category: Article
• ISSN: 0003-4592
• DOI: 10.1002/adic.200690081

✦ Synopsis

Abstract

An atrazine photodegradation study carried out by a Q‐Panel suntest apparatus is reported in this work. H~2~O~2~/TiO~2~ photocatalyzed reaction yield and parameters (time, irradiance, temperature, H~2~O~2~ (40 %) volume, TiO~2~ amount) were exactly determined relating to the used atrazine concentration. An experimental kinetic study was performed to establish the reaction order in fixed conditions. Using a biosensor method, 10^‐4^ M Atrazine solution toxicity and final photocatalytic reaction solution toxicity were quantitatively determined. A consistent toxicity decrease was observed on passing from the analyte to the products of the photocatalytic reaction. An analogous photolytic reaction carried out in absence of TiO~2~, but in the same experimental conditions of time, irradiance, temperature and H~2~O~2~ volume, brings to a toxicity increase.