| 有机锡化合物对底栖动物的急性毒性研究 |
| 摘要点击 1859 全文点击 1506 投稿时间：1993-12-28 |
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| 中文关键词 有机锡化合物 底栖动物 急性毒性 |
| 英文关键词 organotin compounds benthos acute toxicity |
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| 中文摘要 |
| 研究有机锡化合物对摇蚊幼虫等4种底栖动物的急性毒性作用,包括致死浓度(LC)和致死时间(LT).结果表明:①3种丁基锡化合物的毒性依次是三丁基锡(TBT)>二丁基锡(DBT)>单丁基锡(MBT).②TBT对羽摇蚊幼虫的24h LC50为26.86×10-9;对六附器毛突摇蚊幼虫的24h LC50为241.55×10-9;对苏氏尾鳃蚓的24h LC50为145.55×10-9;对霍南水丝蚓的24h LC50为355.63×10-9;.③TBT浓度与尾鳃蚓的半致死时问(LT50)成明显的负相关。 |
| 英文摘要 |
| The acute toxicities of three organotin compounds, i.e., monobutyltin (MBT), dibutyltin (DBT) and tributyltin (TBT), to benthos (Chironomid larvae and tubificids) were reported. The results show that (1) the toxic effects of these compounds in a decreasing order were TBT > DBT > MBT; (2) the median lethal concentration (24h LC50) of TBT to 4 species of benthos was 26. 85 ppb for chironomid larvae (Cllironomlis plumosus), 241.55 ppb for chironomid larvae (Chaetocladius sexpapilosus),145.55 ppb for tubificids (Branchiura sowerbyi), and 355.63 ppb for tubificids (Limnodrilus hoffmesteri);(3) there was a strong negative correlation between the concentration of TBT and the median lethal time (LT50) for B. sowerbyi. |
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