Characterzation and separation of Al_(13) species using gel-filtration chromatography  

作　　者：CHU Yongbao1,2, GAO Baoyu1, YUE Qinyan1, WANG Yan1 & WANG Shuguang1 1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, China 2. College of Material and Environment, Qingdao University of Science and Technology, Qingdao 266042, China 

出　　处：《Science China Chemistry》2006年第4期326-331,共6页中国科学（化学英文版）

基　　金：This work was supported by the subproject of '863' Project of China (Grant No. 2002AA601290-5); the Natural Science Foundation of Shandong Province(Grant No. Y2002B03).

摘　　要：A polyaluminum chloride (PAC) sample was prepared using a slow alkalinetitration method. The Bio-Gel P-100 gel column chromatographic technique was used to separate andcharacterize the various forms of aluminum present in the prepared PAC solution. The effluents froma gel column were monitored using online chemical method: AI-Ferron timed complexationspectropho-tometry and by ^(27)Al nuclear magnetic resonance (NMR) spectroscopy. Effects ofdifferent experimental conditions such as eluent flow rate, ionic strength and pH on separation ofAl_(13) were investigated. Experimental results indicated that molecule size exclusion was not theonly parameter affecting the column chromatographic separation efficiency of Al_(13) but moleculecharge as well. Reducing the eluent flow rate, increasing the ionic strength and suitable pHresulted in increase in the separation efficiency. Experimental results clearly indicated that byvarying the experimental conditions, it is possible to produce pure Al_(13) species using a gelcolumn chromatographic technique.A polyaluminum chloride (PAC) sample was prepared using a slow alkaline titration method. The Bio-Gel P-100 gel column chromatographic technique was used to separate and char- acterize the various forms of aluminum present in the prepared PAC solution. The effluents from a gel column were monitored using online chemical method: Al-Ferron timed complexation spectropho- tometry and by 27Al nuclear magnetic resonance (NMR) spectroscopy. Effects of different experi- mental conditions such as eluent flow rate, ionic strength and pH on separation of Al13 were investi- gated. Experimental results indicated that molecule size exclusion was not the only parameter af- fecting the column chromatographic separation efficiency of Al13 but molecule charge as well. Re- ducing the eluent flow rate, increasing the ionic strength and suitable pH resulted in increase in the separation efficiency. Experimental results clearly indicated that by varying the experimental condi- tions, it is possible to produce pure Al13 species using a gel column chromatographic technique.

关 键 词：AL13 species  column chromatography  POLYALUMINUM chloride (PAC)  SEPARATION and purification. 

分 类 号：O657.7[理学—分析化学]