陕西科技大学学报（自然科学版）2008，Vol.26Issue(6)：58-64,7.
离子吸附对中性超滤膜电性能和渗透性能的影响
ELECTROKINETICS AND PERMEATION EVALUATION ON IONIC ABSORPTION ON UF MEMBRANE WITH NO INTRINSIC CHARGE
鲍文煙 1许振良 1杨虎 1周颖1
作者信息
- 1. 华东理工大学膜科学与技术实验室,上海,200237
- 折叠
摘要
Abstract
In order to neglect the intrinsic charge of membrane and focus on the effect of ion absorption on membrane surface,the present work focused on the electrokinetic and permeation performance of PVDF membrane with a MWCO of 40 000 to investigate the mechanism in UF process.Four types salts with different concentration were measured,those were KCl(1∶1),K2SO4(1∶2),MgCl2(2∶1),MgSO4(2∶2).pH range of 3 to 9 was chosen by the calculation of solubility product for 5 magnesium ions would deposit at pH 9.52.Isoelectric points (IEPs) in 1 electrolyte solutions were at pH 7.4(MgCl2),7.0(MgSO4),6.9(KCl),5.5(K2SO4),which can be explained by various ions mobility.Rejections were zero near isoelectric points (IEPs) and increased in both sides for the rejection of the co-ions.Fluxes were maximal near IEPs and decreased in both ways.关键词
流动电势/超滤/等电点/截留/通量Key words
streaming potential/ultrafiltration/IEP/rejection/flux分类
化学化工引用本文复制引用
鲍文煙,许振良,杨虎,周颖..离子吸附对中性超滤膜电性能和渗透性能的影响[J].陕西科技大学学报（自然科学版）,2008,26(6):58-64,7.
