Dyes are used in the coloration of different substrates, including paper, leather andplastics, but the most important use is on textiles and 10 to 15% of these dyes might belost into the environment. Azo dyes are the most important class, accounting for over50% of all commercial dyes, and this class has been the most studied. In general azodyes are toxic to aquatic organisms and some types of dyes are more toxic than others.But although these compounds as well as their reduced/chlorinated transformationproducts can be found in aquatic ecosystems, no mutagenicity data are available untilnow in aquatic organisms. This remark remains of value, as well, regarding genotoxicitypotential of such dyes towards aquatic organisms. Many studies have demonstrated thatDNA damage measurement represents a very sensitive biomarker of exposure in aquaticspecies that can be studied both in vivo and in vitro using for example fish cell lines.The aim of this project is to bring some informations regarding the monitoring in SaoPaulo State aquatic ecosystems of Disperse Red 1 dye suspected to impact aquatic life;and regarding the assessment of genotoxicity using both in vitro (fish cell lines) and invivo in fish exposed to dye effluents in the field.
News published in Agência FAPESP Newsletter about the scholarship: