化学学报 ›› 2005, Vol. 63 ›› Issue (18): 1671-1675. 上一篇    下一篇

研究论文

聚合氯化铝中Al13形态的分离纯化方法及特性

高宝玉*,1,孔春燕2,岳钦艳1,王晓娜1,初永宝1,王曙光1   

  1. (1山东大学环境科学与工程学院 济南 250100 )
    (2德州学院化学系 德州 253023)
  • 投稿日期:2005-12-16 修回日期:2005-05-23 发布日期:2010-12-10
  • 通讯作者: 高宝玉

Purification and Characterization of Al13 Species in Polyaluminum Chloride

GAO Bao-Yu*,1, KONG Chun-Yan2, YUE Qin-Yan1, WANG Xiao-Na1, CHU Yong-Bao1, WANG Shu-Guang1   

  1. (1School of Environmental Science and Engineering, Shandong University, Jinan 250100)
    (2Department of Chemistry, Dezhou College, Dezhou 253023)
  • Received:2005-12-16 Revised:2005-05-23 Published:2010-12-10
  • Contact: GAO Bao-Yu

采用柱层析法、沉淀置换法和乙醇-丙酮混合溶剂法对聚合氯化铝(PAC)中的Al13形态进行了分离提纯, 采用Al-Ferron逐时络合比色法, 27Al NMR, TEM, SEM, 电位测定法, 粒度测定法等多种现代分析仪器和方法对不同分离提纯方法得到的Al13形态进行了分析表征和比较, 并初步比较研究了Al13形态的水处理效果. 实验结果表明, 不同分离纯化方法得到的 Al13形态具有不同的结构形貌、粒度分布、电性和水处理效果. 乙醇-丙酮混合溶剂法得到的Al13形态具有良好的纯度和水处理效果. 该研究初步证实了Al13是PAC中的最佳絮凝形态.

关键词: Al13形态, 分离纯化, 絮凝效果, 比较

The Al13 species were separated and purified with column chromatography method, precipitation with adding ethanol and acetone, and displacement method from a series of polyaluminum chloride solutions, which have the same Al13 percentage but different total Al concentration. They were characterized by Al-Ferron timed complexation spectrophotometry, 27Al NMR, TEM, SEM and Zetasizer 3000 HSA. Coagulation efficiency was tested by Jar tests for Al13, polyaluminum chloride and AlCl3 in treating synthetic water samples. The results indicate that, the precipitation with adding ethanol and acetone method led to the best outcome compared to the other two methods: the biggest mean particle size of Al13 species and the highest degree of polymerization. The experimental results by jar tests show that the Al13 species was more positively charged and achieved the most turbidity removal results. Consequently, Al13 species is the most effective polymeric Al species in water and wastewater treatment.

Key words: Al13 species, separation and purification, coagulation efficiency, comparison