標題: The combined toxic effects of nonpolar narcotic chemicals to Pseudokirchneriella subcapitata
作者: Hsieh, SH
Tsai, KP
Chen, CY
環境工程研究所
Institute of Environmental Engineering
關鍵字: toxicity;algae;Pseudokirchneriella subcapitata;EC50;combined effects;photosynthesis
公開日期: 1-六月-2006
摘要: This paper presents the toxicity data of 10 nonpolar narcotic chemicals on Pseudokirchneriella subcapitata (green algae) assessed by a new algal toxicity testing technique conducted under air-tight environment. Based on DO production, median effective concentration (EC50) varies from 1.73mg/L (1-octanol) to8040 mg/L (2-propanol). The endpoint of algal growth rate reveals similar sensitivity as that from DO production. Compared to literature data, Pseudokirchneriella subcapitata and Nitrosomonas are apparently more sensitive to nonpolar narcotics than other organisms such as minnow, daphnia, and Tetrahymena pyriformis. Furthermore, good correlations between toxic effects observed from Pseudokirchneriella subcapitata and other aquatic organisms were found. Hence, algal toxicity test can be considered as a surrogate test for estimating the toxicity of nonpolar chemicals to fathead minnow, Microtox, activated sludge, Daphina magna, and Tetrohymena pyriformis. The combined effects of 13 binary mixtures of nonpolar chemicals were investigated using both additive-index method and isobologram analysis. overall speaking, the joint actions between these chemicals are strictly additive. Model analyses indicate that these compounds act on identical reaction sites or receptors, which verify that these chemicals are of the same toxicity mechanism (narcosis). (c) 2006 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.watres.2006.03.026
http://hdl.handle.net/11536/12195
ISSN: 0043-1354
DOI: 10.1016/j.watres.2006.03.026
期刊: WATER RESEARCH
Volume: 40
Issue: 10
起始頁: 1957
結束頁: 1964
顯示於類別:期刊論文


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