人工晶体学报2009，Vol.38Issue(2)：340-345,6.
流动电势测量法表征Al2O3微滤膜的表面电荷性能
Surface Charge Effect of Al2O3 Ceramic MF Membrane Determined by Streaming Potential Measurement
摘要
Abstract
The electrokinetic properties of Al2O3 microfiltration membranes (MF) were characterized by streaming potential measurements during tangential filtration of solutions with various conditions of pH, electrolyte species and concentration. Results show that the streaming potentials are dependent on the pH of filtered solutions, types of the electrolyte and ionic concentration. The IEP of the membrane is about 6.1 when filtered with 10-3 mol/L NaCl solution, and shifts toward a higher pH of 6.8 and a lower pH of 5.6 for the solutions of CaCl2 and Na2SO4 with the same ionic concentration, respectively, because of specific adsorption of Ca2+ and SO42-. The specifically adsorbed ions (Ca2+ and SO42-) can change the IEP and net charge sign of the membranes as their concentration increases, whereas electrolytes NaCl can only asymptotically reduce it to zero.关键词
氧化铝/微滤膜/流动电势/等电点/电解质Key words
alumina/microfiltration membrane/streaming potential/isoelectric point/electrolyte分类
化学化工引用本文复制引用
张小珍,周健儿,冯均利,江瑜华..流动电势测量法表征Al2O3微滤膜的表面电荷性能[J].人工晶体学报,2009,38(2):340-345,6.基金项目
The project supported by the Chinese International Science and Technology Corporation Program (2005DFA50450) and Natural Science Foundation of Jiangxi of China(2007GZC0799) (PRA-MX04-06) （2005DFA50450）
