硅酸盐学报2009，Vol.37Issue(2)：299-303,5.
ZrO2/堇青石微滤膜表面荷电性能及其对膜通量的影响
ELECTROKINETIC PROPERTIES OF ZIRCONIA/CORDIERITE MICROFILTRATION MEMBRANE AND ITS INFLUENCE ON PERMEATE FLUX
摘要
Abstract
Zirconia/cordierite microfiltration membrane was prepared by extrusion in combination with slip casting.The electrokinetic properties of the as-prepared membrane were characterized by the streaming potential measurements in tangential microfiitration mode.The influences of pH value.electrolyte species and concentrations of filtered solutions on the electrokinetic properties and permeate flux were investigated.The results show that the streaming potentials are dependent on the pH value,the type of electrolyte and the concentration of the filtered solution.The isoelectric point (IEP) of the membranes rose from 4.2 to 5.4 for different types of electrolyte solutions with a concentration of 10-3mol/L.The streaming potential of membrane increases gradually with the increase of ionic concentration of NaCl solution,and this causes the streaming potential to tend to be Zero at high salt concentrations.However,the IEP of the membrane does not change.The specific adsorption of Ca2+ and SO42- ions in CaCl2 and Na2SO4 solutions onto the pore wall of the membrane surface can alter the IEP and the net charge sign of the membrane surface.The as-prepared zirconia/cordierite membrane shows a maximal permeate volume flux near the IEP.关键词
氧化锆/董青石/微滤膜/流动电势/渗透通量Key words
zircoaia/cordierite/microfiltration membrane/streaming potential/permeate flux分类
化学化工引用本文复制引用
周健儿,汪永清,张小珍,LARBOT André,PERSIN Michel..ZrO2/堇青石微滤膜表面荷电性能及其对膜通量的影响[J].硅酸盐学报,2009,37(2):299-303,5.基金项目
国际科技合作(2005DFA50450)资助项目. （2005DFA50450）
