| 应用生物配体模型（BLM）研究辽河与太湖水体中铜对大型溞的急性毒性 |
| 摘要点击 2276 全文点击 1461 投稿时间：2013-07-29 修订日期：2013-12-18 |
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| 中文关键词 生物配体模型 Cu 大型溞 急性毒性 辽河 太湖 |
| 英文关键词 biotic ligand model(BLM) copper daphnia magna acute toxicity Liaohe River Taihu Lake |
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| 中文摘要 |
| 应用生物配体模型（BLM）预测我国辽河与太湖的丰水期和枯水期4个点位铜对大型溞的急性毒性（48 h-LC50），与实际水样的毒性试验结果进行比较. 结果表明，在辽河红庙子、太湖平台山和拖山这3个点位中的BLM预测48 h-LC50值为232.75~411.49 μg·L-1，实测48 h-LC50值为134.55~350.00 μg·L-1，两者具有较好的一致性，而辽河通江口点位，丰水期和枯水期BLM 预测48 h-LC50值与实测值相差较大. BLM预测结果与实测结果得到的水效应比（WER）范围分别为2.18~5.79与1.88~11.15，均大于1. 各点位的枯水期Cu对大型溞的急性毒性均大于丰水期，可能是Cu与溶解性有机质（DOC）络合降低了其毒性. |
| 英文摘要 |
| The acute toxicity (48 h-LC50) of copper to Daphnia magna predicted by the biotic ligand model (BLM) was compared with the 48 h-LC50 measured in water samples from Liaohe River and Taihu Lake at four specific sites in wet and dry seasons. The results showed that 48 h-LC50 values predicted by BLM were 232.75-411.49 μg·L-1 and 48 h-LC50 values measured in the water samples were 134.55-350.00 μg·L-1 in three sites of Hongmiaozi of Liaohe River, Pingtaishan and Tuoshan of Taihu Lake, which had a better consistency. While for Tongjiangkou of Liaohe River, there was a difference between the BLM predictions and the measured values in wet and dry seasons. According to the predictions and the experimental results, water effect ratios (WERs) were in the range of 2.18-5.79 and 1.88-11.15 which all were higher than 1. The acute toxicity of Cu of all sites in dry season was greater than those in wet season, which might be that Cu complexation with dissolved organic matter (DOC) reduced the toxicity of Cu. |
