標題: Toxicity assessment of polycyclic aromatic hydrocarbons using an air-tight algal toxicity test
作者: Chen, C. Y.
Yan, Y. K.
Yang, C. F.
環境工程研究所
Institute of Environmental Engineering
關鍵字: PAHs;photo-induced toxicity;Pseudokirchneriella subcapitata;QSAR
公開日期: 2006
摘要: The existing toxicity data on the effects of polycyclic aromatic hydrocarbons (PAHs) on Pseudokirchneriella subcapitata (green alga) are quite insufficient. These data were derived using different test techniques (e.g. conventional batch test, closed-system test, semi-static test). The relative toxicity relationship for various PAHs is thus difficult to interpret. Consequently, the current toxicity database is insufficient and also inadequate for analyses of the effects of PAHs on P. subcapitata. This study evaluated the toxicity city of eleven PAHs using an air-tight test technique. The relative toxicity relationship was determined on a uniform basis, and was different from the relationship based on current available data. P. subcapitata. was found to be more susceptible to PAHs than Daphnia magna, fathead minnow, and Scenedesmus subspicatus. Quantitative structure-activity relationship (QSAR) was established based on the chemical's hydrophobicity with R-2 equal to 0.88. Photo-induced toxicity for various PAHs was also explored by exposing PAHs under UV-photoactivation. Toxicity of anthracene, benzanthrone, and benz[a]anthracene was found to increase 3.5 to 25 times after UV exposure. Phototoxicity was observed when the HOMO-LUMO gap varied between 6.8 and 8.0 eV.
URI: http://hdl.handle.net/11536/16986
http://dx.doi.org/10.2166/wst.2006.722
ISSN: 0273-1223
DOI: 10.2166/wst.2006.722
期刊: WATER SCIENCE AND TECHNOLOGY
Volume: 54
Issue: 11-12
起始頁: 309
結束頁: 315
Appears in Collections:Conferences Paper