不同碳链长度的离子液体对大型溞摄食行为的影响

Effect of Ionic Liquids with Different Alkyl Chain Lengths on Feeding Behavior of Daphnia magna

用细胞计数法研究了不同碳链长度的离子液体对大型溞滤水率和摄食率的影响．结果表明，随着碳链长度的增加，离子液体对大型溞的48h急性毒性增大，其LC50在49μg／L和15326μg／L之间．不同碳链长度的离子液体都显著地降低了大型溞的滤水率和摄食率，其最大浓度处理组分别比对照降低了60％～84％．结果提示，离子液体对大型溞摄食行为具有很大的毒性影响，因此对水生环境可能也具有潜在的生态风险．

The filtration and ingestion rates ofDaphnia magna were measured to evaluate the potential impact ofn-alkyl chains of ionic liquids on the aquatic environment. The results showed that the toxicity to D. magna increased with the increasing of n-alkyl chain length and the LC50 of ionic liquids ranged from 49 to 15 326μg/L. Furthermore, the filtration and ingestion rates ofD. magna significantly decreased when exposed to n-alkyl chains of ionic liquids compared to the control. And at the highest concentration of ionic liquids the filtration rate and ingestion rate decreased from 60% to 84% when compared with the control groups. Our results indicate that the ionic liquids have potential risk to the aquatic environment if they enter water body Fig 1, Tab 1, Ref25