摘要：利用离子液体十六烷基-3-甲基咪唑氯化物对天然沸石进行表面改性,并将改性沸石用于水中Cr(VI)的吸附,研究离子液体浓度、反应时间、pH等条件对Cr(VI)吸附性能的影响,采用X射线衍射和红外光谱对离子液体改性沸石进行表征。结果表明,咪唑离子浓度不大于0.3 mol/L的低浓度离子液体改性的沸石对Cr(VI)的吸附作用不明显,咪唑离子浓度大于0.9 mol/L的离子液体改性的沸石对Cr(VI)具有好的吸附效果;酸性条件有利于改性沸石对Cr(VI)的吸附;咪唑离子浓度为0.6、0.9 mol/L的离子液体改性的沸石吸附Cr(VI)平衡的时间分别为240、8 min。

关键词：改性沸石；离子液体；吸附

Abstract： Ionic liquids 1-hexadecyl -3-methylimidazolium chloride monohydrate was utilized for surface modification of natural zeolites. The modified zeolites were used in adsorption of Cr（VI）. The effect of adding amount of ionic liquid， reacting time and pH condition was studied. The modified zeolites were characterized by XRD and IR. The results indicate that the adsorption effect of Cr（VI） by low ionic liquid concentration of 0.3 mol/L is not obvious. The effect of adding amount of ionic liquid is excellent when the concentration is greater than 0.9 mol/L. Acidic conditions are conducive to the adsorption of Cr（VI） by the modified zeolite. The adsorption of Cr（VI） by the ionic liquid modified zeolite with ionic liquid concentrations of 0.6 and 0.9 mol/L reaches equilibrium at 240 and 8 min respectively. 

Keywords: modified zeolite； ionic liquid； adsorption