碩士 / 國立交通大學 / 環境工程系所 / 93 / The effects on algal (Pseudokirchneriella subcapitata) inhibition of 11 PAHs between dark and light conditions were assessed by using a close-system BOD bottle test , and evaluated the effect of phototoxicity. The result show that B[b]C is the most toxic compound and the toxicity was risen by increasing the number of rings. Six compounds reveals obvious phototoxic after the irradiation of UV lights among the 11 PAHs of our test. They are Ben , Flu , Ant , B[a]A , Acr , Per. Besides, the most sensitive end point in our test is FY.
The prediction of phototoxicity by QSAR in our test is established by the HOMO-LUMO gap and the EC50 ratio between dark and light. The △GAP distributed over the range of 6.7~7.9 ev exhibits phototoxic base on growth rate. The other two of the end points show the similar results. In addition, the results indicates that NOEC offers better protection to test organisms than EC10 by observation of the cut-off value. With regard to other parameters we found that there are good correlation between LogP and the result of our test.
The BOD bottle test shows a greater sensitivity than other species and a good correlation was found in comparison with the fish (Fathead minnow).
| Identifer | oai:union.ndltd.org:TW/093NCTU5515013 |
| Date | January 2005 |
| Creators | Yan Chen-Kai, 顏丞凱 |
| Contributors | Chen Chung-Yuan, 陳重元 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 149 |
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