中文摘要：

采用急性毒性试验的方法，研究了叔丁基对羟基茴香醚（Butylated hydroxyanisole，BHA）和诺氟沙星（Norfloxacin，NFLX）对水生生物斜生栅藻和大型涵的毒性效应。结果表明大型溢在BHA和NFLX暴露下48h的LC50分别为3．15mg·L^-1和194．98mg·L^-1。BHA和NFLX对斜生栅藻也有明显的毒性作用，其96h的EC50分别为6．19mg·L^-1和50．18mg·L^-1。大型蚤对BHA暴露的敏感性强于斜生栅藻，而斜生栅藻对NFLX的敏感性比大型潘强。根据化学物质对鱼类和涵类的毒性评价标准，BHA和NFLX分别属于中等和低等毒性的化合物。

英文摘要：

The toxic effects of Butylated hydroxyanisole （BHA） and Norfloxacin （NFLX） to Scenedesmus obliquus and Daphnia magna was studied through acute toxicity test index. The results showed that BHA and NFLX remarkably restrained the mobilization ofD magna, even causing them death in the given concentration. LC50 value of BHA and NFLX for D. magna at 48h were 3.15mg·L^-1 and 194.98mg·L^-1, respectively. BHA and NFLX also had the toxicity effect on S. obliquus and 96h EC50 value were 6.19mg·L^-1 and 50.18mg·L^-1, respectively. Based on the EC50 and LC50 values, BHA and NFLX belonged to mid-toxic and low-toxic to Aquatic Organisms. Compared with D. magna, S. obliquus showed more sensitive to NFLX. While D. magna showed more sensitive than S.obliquu to BHA.