采用硅铝比(SiO2与Al2O3的物质的量之比)为31.66和190.73的两种β沸石分子筛,吸附氯化1,3-二甲基咪唑([DMIM] Cl)、氯化1-丁基-3-甲基咪唑([BMIM] Cl)及氯化1-辛基-3-甲基咪唑([OMIM] Cl)等3种不同分子量大小的咪唑类离子液体,研究不同硅铝比的β沸石对分子大小不同的离子液体的吸附差异.实验结果表明,β沸石对离子液体的吸附等温线符合Freundlich吸附模式,[DMIM] Cl、[BMIM] Cl和[OMIM] Cl在β1沸石上的吸附容量分别为0.62 mmol·g-1、0.67 mmol·g-1和0.73 mmol·g-1,在β2沸石上的吸附容量分别为0.23 mmol· g-1、0.38 mmol· g-1和0.55 mmol·g-1β1沸石的吸附效果比β2沸石要好,且随着离子液体阳离子上烷基侧链碳原子数目增加,针对同一种吸附质,β1和β2沸石吸附容量之间的差异逐渐减小.吸附动力学显示[DMIM] Cl、[OMIM] Cl在β沸石上的吸附符合二级动力学,β1沸石吸附速率高于β2沸石,且吸附平衡所需时间更短.[DMIM] Cl和[OMIM] Cl在β1沸石上的吸附速率常数分别为0.0248 g·mg-1·min-1和0.0109 g·mg-1·min-1,在β2沸石上的吸附速率常数分别为0.0171 g·mg-1·min-1和0.0033 g·mg-1·min-1β沸石对离子液体[BMIM] Cl及[OMIM]Cl的吸附容量比目前已报道文献中的活性炭的更高,是去除水体中离子液体的一种潜在优质吸附剂.
参考文献
| [1] | 纪开吉;杨杰;岳群峰.介孔硅SBA-15对水溶液中咪唑基离子液体的吸附性能研究[J].化学工程师,2014(11):72-75. |
| [2] | 曲玉萍;陆颖舟;李春喜.5种吸附剂对水中离子液体的吸附性能[J].环境工程学报,2012(9):2969-2973. |
| [3] | E.M. Siedlecka;M. Golf biowski;Z. Kaczynski.Degradation of ionic liquids by Fenton reaction; the effect of anions as counter and background ions[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,20091/2(1/2):573-579. |
| [4] | Siedlecka, EM;Czerwicka, M;Stolte, S;Stepnowski, P.Stability of Ionic Liquids in Application Conditions[J].Current organic chemistry,201112(12):1974-1991. |
| [5] | THI PHTJONG THUY PHAM;CHUL-WOONG CHO;CHE-OK JEON.Identification of Metabolites Involved in the Biodegradation of the Ionic Liquid 1-Butyl-3-methylpyridinium Bromide by Activated Sludge Microorganisms[J].Environmental Science & Technology: ES&T,20092(2):516-521. |
| [6] | J. Palomaf;J. Lemus;M.A. Gilarranz.Adsorption of ionic liquids from aqueous effluents by activated carbon[J].Carbon: An International Journal Sponsored by the American Carbon Society,20097(7):1846-1856. |
| [7] | Jesus Lemus;Jose Palomar;Francisco Heras.Developing criteria for the recovery of ionic liquids from aqueous phase by adsorption with activated carbon[J].Separation and Purification Technology,2012:11-19. |
| [8] | Xinhua Qi;Luyang Li;Tengfei Tan.Adsorption of 1-Butyl-3-Methylimidazolium Chloride Ionic Liquid by Functional Carbon Microspheres from Hydrothermai Carbonization of Cellulose[J].Environmental Science & Technology: ES&T,20136(6):2792-2798. |
| [9] | Sun Beom Choi;Sung Wook Won;Yeoung-Sang Yun.Use of ion-exchange resins for the adsorption of the cationic part of ionic liquid, 1-ethyl-3-methylimidazolium[J].Chemical engineering journal,2013:78-82. |
| [10] | Guozhen Fang;Jing Chen;Junping Wang;Jinxing He;Shuo Wang.N-Methylimidazolium ionic liquid-functionalized silica as a sorbent for selective solid-phase extraction of 12 sulfonylurea herbicides in environmental water and soil samples[J].Journal of chromatography, A: Including electrophoresis and other separation methods,201010(10):1567-1574. |
| [11] | 成官文;吴志超;章非娟;徐月江;陈建国.沸石在水污染控制中的研究与应用进展[J].环境科学与技术,2006(3):111-114. |
| [12] | 祁晓岚 .十二员环沸石合成、表征及催化性能研究[D].中国石油化工科学研究院,2001. |
| [13] | 祁晓岚;王战;李士杰;李斌;刘希尧;林炳雄.无胺法合成高硅丝光沸石的表征[J].物理化学学报,2006(2):198-202. |
| [14] | 赵培侠;刘靖.改性Hβ沸石的物化性能表征[J].河南化工,2008(1):21-24. |
| [15] | 李强;窦涛;霍全;徐庆虎;巩雁军;潘惠芳.不同硅铝比β沸石的理化性质及烃类催化裂化活性[J].物理化学学报,2008(7):1192-1198. |
| [16] | Amjad Farooq;Laurence Reinert;Jean-Marc Leveque.Adsorption of ionic liquids onto activated carbons: Effect of pH and temperature[J].Microporous and mesoporous materials: The offical journal of the International Zeolite Association,2012:55-63. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%