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[1]陈雪方,杨刚,邢卫红,等.pH及盐对DK纳滤膜性能的影响[J].南京工业大学学报(自然科学版),2013,35(06):43-47.[doi:10.3969/j.issn.1671-7627.2013.06.009]
 CHEN Xuefang,YANG Gang,XING Weihong,et al.Effects of pH and salts on DK nanofiltration performance[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2013,35(06):43-47.[doi:10.3969/j.issn.1671-7627.2013.06.009]
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pH及盐对DK纳滤膜性能的影响()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
35
期数:
2013年06期
页码:
43-47
栏目:
出版日期:
2013-11-20

文章信息/Info

Title:
Effects of pH and salts on DK nanofiltration performance
文章编号:
1671-7627(2013)06-0043-05
作者:
陈雪方杨刚邢卫红徐南平
南京工业大学 材料化学工程国家重点实验室,江苏 南京 210009
Author(s):
CHEN XuefangYANG GangXING WeihongXU Nanping
State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing University of Technology,Nanjing 210009,China
关键词:
纳滤 膜性能 pH 等效荷电密度
Keywords:
nanofiltration membrane performance pH salt effective charge density
分类号:
TQ028.8
DOI:
10.3969/j.issn.1671-7627.2013.06.009
文献标志码:
A
摘要:
采用DK纳滤膜进行电解质KCl-MgCl2水溶液纳滤实验,考察pH、盐浓度及类型对纳滤膜性能的影响。通过道南细孔-介电(DSPM-DE)模型计算等效荷电密度(Xd),研究DK纳滤膜表面电荷与性能之间的关系。通过DSPM模型拟合不同pH条件下葡萄糖截留数据表征膜的结构性质。结果表明:膜的等效膜孔(rp)和等效膜厚(SymbolDA@x/Ak)数值在碱性条件下大于酸性及中性的; KCl的截留率随盐浓度增加而减小, pH为4.0时截留率最小; MgCl2的截留率随盐浓度增加而增大,随pH增大而减小。模型分析发现 Xd取决于pH、盐浓度及类型; 对KCl和MgCl2 2种溶液,膜性能取决于所对应条件下 Xd的大小。
Abstract:
Single salt solutions KCl-MgCl2 were filtrated with a commercially available DK nanofiltration membrane to evaluate effects of pH,as well as concentration and type of salt in the feed side on the membrane performance.The Donnan steric pore and dielectric exclusion(DSPM-DE)model was used to calculate effective membrane charge density,and the relationship between the membrane surface charge and the performance was analyzed.Membrane characterization was completed by introducing structural properties,by the fit of the DSPM model on real glucose rejections at different pH.Results revealed that higher values of rp and SymbolDA@x/Ak were observed in the alkaline region compared with that of the neutral or acidic region.KCl rejection always decreased with the increased salt concentration and the minimum rejection at pH 4.0 was obtained in contrast,MgCl2 rejection increased with the increased salt concentration and the decreased pH.Model analysis showed that Xd was affected by pH,concentration and type of salt in the feed side, and what was important in determining the membrane performance was the role of Xd existing under the corresponding conditions.

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备注/Memo

备注/Memo:
收稿日期:2013-02-28
基金项目:江苏省科技厅产学研前瞻性联合研究项目(BY2009106); 国家自然科学基金(20576052)
作者简介:陈雪方(1987—),女,江苏淮安人,硕士生,主要研究方向为膜分离; 杨刚(联系人),教授,E-mail:yanggang@njut.edu.cn..
更新日期/Last Update: 2013-11-30