Toxicity of 14 photooxidized anthracene derivatives to Lemna gibba L.G-3
- Univ. of Waterloo, Ontario (Canada)
Phototoxicity of PAHs is known to occur via photosensitization reactions and potentially by photomodification of chemicals to more toxic species. The hazards enhancement of polycyclic aromatic hydrocarbon (PAHs) toxicity to plants by artificial light source and natural solar radiation has been recently demonstrated. Growth and chlorosis were used as end points to assess the photoinduced toxicity to 14 oxygenated anthracene derivatives to Lemna gibba. Reversed-phase liquid chromatography (HPLC) equipped with diode array detector was used as analytical technique for measurement of polycyclic aromatic hydrocarbons photomodification products and to study the modification kinetics. The toxicity bioassays were performed both under visible light and simulated solar radiation (SSR), which mimicked the relative load of UV + visible light in solar radiation. Comparative studies with visible and SSR showed that the phototoxicity of these chemicals was activated, with UV radiation being the most influenced spectral region in enhancing the harmful effects of the chemicals. Photomodified PAHs exhibited toxicity in visible light and increased toxicity in simulate solar radiation. The rates of photomodification of chemicals were quite different but rapid enough to contribute to toxicity. There was increase in inhibition of growth of plants, relative to control, with increasing in rate of photomodification of the oxygenated PAHs.
- OSTI ID:
- 455330
- Report Number(s):
- CONF-961149--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of simulated solar radiation on the bioaccumulation of polycyclic aromatic hydrocarbons by the duckweed, Lemna gibba
Photoinduced toxicity of sediment-bound polycyclic aromatic hydrocarbons