TITLE:
Photodegradation of Atrazine on TiO2―Products Toxicity Assessment
AUTHORS:
Sarka Klementova, Zuzana Rabova-Tousova, Ludek Blaha, David Kahoun, Petr Simek, Lucie Keltnerova, Martin Zlamal
KEYWORDS:
Atrazine, Photodegradation, Toxicity Tests, Algae, Rainbow Trout Gill Cells
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.5 No.1,
January
22,
2015
ABSTRACT: Toxicity in reaction mixtures of atrazine irradiated on immobilized TiO2 at varying irradiation times was studied using an algal growth test on unicellular green alga Raphidocelis subcapitata and a cytotoxicity test with a RTgill-W1 cell line. The toxicity of atrazine samples to algae decreased exponentially with the time of irradiation on TiO2 up to 3 h for both IC50 and IC20 values calculated for growth rate inhibition and yield. A trend to increasing variability between replicates in atrazine samples irradiated on TiO2 for longer time periods was observed; the trend was particularly pronounced in samples irradiated for 3 and 5 hours, where the atrazine samples caused moderate stimulation in lower concentration treatments (up to 550 μg/l of the initial atrazine concentration). None of the atrazine samples showed significant cytotoxicity to the rainbow trout gill cell line (RTgill-W1).