Abstract:

Acid-modified bentonite was used for the adsorption of low concentration ［BMIM］Cl ionic liquid solution.The effect of adsorption temperature;adsorption time and pH value of ionic liquid solution on the adsorption properties was investigated.Experimental results showed that acid-modified bentonite had good adsorption properties for the cation of ［BMIM］Cl ionic liquid.In the neutral solution;acid-modified bentonite had the maximum adsorption capacity for ［BMIM］Cl.The adsorption process of ［BMIM］Cl by acid-modified bentonite was exothermic and belonged to the Langmuir isothermal adsorption.At the same time;the Langmuir isothermal adsorption equation was obtained and the correlation coefficient was larger than 0.99.

Key words:

离子液体, 吸附, 酸改性膨润土, ［BMIM］Cl

摘要：

利用酸改性膨润土对低浓度［BMIM］Cl离子液体水溶液的吸附性能进行研究;考察了吸附温度、吸附时间、溶液pH值等吸附条件对离子液体的吸附率的影响。结果表明;酸改性膨润土对［BMIM］Cl的阳离子具有良好的吸附作用。在中性溶液中;酸改性膨润土对离子液体具有最大的吸附率。酸改性膨润土对离子液体的吸附过程是放热过程且属于Langmuir等温吸附;同时;得到膨润土上离子液体吸附的Langmuir等温方程且相关系数大于0.99。

关键词:

离子液体, 吸附, 酸改性膨润土, ［BMIM］Cl