Toxicity Assessment of Nano-TiO2 Exposure on Nitrogen-Fixing Cyanobacteria
Abstract:Better understanding of the potential environmental impact of engineered nanomaterials is prerequisite for further advancement of nanotechnology. This study investigated the impact of nano-TiO2 exposure on primary producer algal cell-Anabaena variabilis. The combination of modern analytical techniques such as Atomic Force Microscope, Transmission Electron Microscopy and Raman microscopy allowed for both qualitative and quantitative evaluation of various impacts of nano-TiO2M on algal cells in terms of effects on growth, nitrogen fixation rate, cell surface properties alteration, intracellular structure changes and migration and bioaccumulation of the NM. Alterations in cell surface, membrane and key functional biomolecules (cyanophycin granules) and oxidative stress observed are most likely important causes of nitrogen fixation and bacterial growth inhibition. In addition, the ability of aggregated nanomaterials to dissipate overtime into smaller size and to penetrate through cell membranes suggested that internalization can occur in cyanobacteria.
Document Type: Research Article
Publication date: 2010-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Ingenta Connect is not responsible for the content or availability of external websites