5种吸附剂对水中离子液体的吸附性能  

Adsorption of five adsorbents for different ionic liquids aqueous solutions

作　　者：曲玉萍[1,2] 陆颖舟[2] 李春喜[1,2] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029 [2]北京化工大学化学工程学院,北京100029

出　　处：《环境工程学报》2012年第9期2969-2973,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20776015)

摘　　要：实验研究了蒙脱土、活性白土、人造沸石、活性炭和水滑石5种吸附材料在25℃和50℃下对[Bmim]Cl的吸附过程,结果表明,蒙脱土对离子液体的去除效果最好,温度对活性炭的吸附有一定的影响,而对其他吸附剂的影响不大,说明这些无机矿物发生了离子交换型吸附过程。实验进一步研究了蒙脱土在25℃下对[Bmim]Cl、[Bmim]BF4、[Bmim]PF6、[Bmim]DBP、[Hmim]Cl和[Omim]Cl 6种离子液体的吸附行为,结果表明,对于阳离子相同的离子液体,阴离子对吸附影响不大;对于阴离子相同的离子液体,其饱和吸附量随着阳离子链长的增加而减小。The adsorption behavior of ionic liquid（IL） Cl on five adsorbents,i.e.montmorillonite,activated clay,artificial zeolite,activated carbon and hydrotalcite at 25℃ and 50℃ was studied experimentally.The results show that montmorillonite is the best adsorbent for Cl,and the temperature dependence of adsorption is observed only for the activated carbon,indicating an ionic exchange based chemical adsorption for the inorganic ore adsorbents.The adsorption of montmorillonite for six ILs,viz.Cl,BF4,PF6,DBP,Cl and Cl at 25℃ was further studied experimentally,it is showed that the anions have little effect on the adsorption of ILs with the same cation,and the equilibrium adsorption decreases slightly as the substitute chain length of the cations for the ILs with the same anion.

关 键 词：离子液体 蒙脱土 活性白土 人造沸石 活性炭 水滑石 平衡吸附量 

分 类 号：X703.1[环境科学与工程—环境工程]