Comparison of the Volume Charge Density of Nanofiltration Membranes Obtained from Retention and Conductivity Experiments

被引：19

作者：

Benavente, Juana ^{[2
]}

Silva, Veronica ^{[1
]}

Pradanos, Pedro ^{[1
]}

Palacio, Laura ^{[1
]}

Hernandez, Antonio ^{[1
]}

Jonson, Gunnar ^{[3
]}

机构：

[1] Univ Valladolid, Fac Ciencias, Grp Superficies & Mat Porosos, Dpto Fis Aplicada, Valladolid 47071, Spain

[2] Univ Malaga, Fac Ciencias, Dpto Fis Aplicada, E-29071 Malaga, Spain

[3] Tech Univ Denmark, Dept Chem Engn, DK-2900 Lyngby, Denmark

来源：

LANGMUIR | 2010年 / 26卷 / 14期

关键词：

ATOMIC-FORCE MICROSCOPY; PORE-SIZE DISTRIBUTION; DIELECTRIC EXCLUSION; HINDRANCE FACTORS; HINDERED TRANSPORT; MODEL; SURFACE; PERFORMANCE; MACROMOLECULES; ELECTROLYTE;

D O I：

10.1021/la100900w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A version of the Donnan steric-partitioning pore model with dielectrical exclusion (DSPM-DE) has been used to get information on the pore size and charge density of a commercial membrane, NF45 from FilmTec, from its retention of KCl solutions. The conductivity inside the pores has been measured by impedance spectroscopy, and the electric potential drop during retention experiments has also been measured. These experimental data on conductivity and electric potential are analyzed, by using the thermodynamics of irreversible processes and the space charge model, to obtain the pore charge density of the membrane. These two methods give results in fair accordance which probes that the sometimes controversial method of DSPM-DE can give accurate results for the charge as well as for the mean pore size of a nanofiltration membrane. Sonic clues to improve the way this model can be used are given as well.

引用

页码：11841 / 11849

页数：9

共 49 条

[1]

[Anonymous], NANOFILTRATION PRINC

[2] Effect of adsorption of charged macromolecules on streaming and membrane potential values measured with a microporous polysulfone membrane [J].

Benavente, J ;

Jonsson, G .

SEPARATION SCIENCE AND TECHNOLOGY, 1997, 32 (10) :1699-1710

[3] Influence of the external conditions on salt retention and pressure-induced electrical potential measured across a composite membrane [J].

Benavente, J ;

Jonsson, G .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1999, 159 (2-3) :431-437

[4] Characterization and prediction of nanofiltration membrane performance - A general assessment [J].

Bowen, WR ;

Mohammad, AW .

CHEMICAL ENGINEERING RESEARCH & DESIGN, 1998, 76 (A8) :885-893

[5] Characterisation of nanofiltration membranes for predictive purposes - Use of salts, uncharged solutes and atomic force microscopy [J].

Bowen, WR ;

Mohammad, AW ;

Hilal, N .

JOURNAL OF MEMBRANE SCIENCE, 1997, 126 (01) :91-105

[6] Modelling the performance of membrane nanofiltration - critical assessment and model development [J].

Bowen, WR ;

Welfoot, JS .

CHEMICAL ENGINEERING SCIENCE, 2002, 57 (07) :1121-1137

[7] Characterisation and prediction of separation performance of nanofiltration membranes [J].

Bowen, WR ;

Mukhtar, H .

JOURNAL OF MEMBRANE SCIENCE, 1996, 112 (02) :263-274

[8] The use of atomic force microscopy to quantify membrane surface electrical properties [J].

Bowen, WR ;

Doneva, TA ;

Stoton, JAG .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2002, 201 (1-3) :73-83

[9] Modelling of membrane nanofiltration - pore size distribution effects [J].

Bowen, WR ;

Welfoot, JS .

CHEMICAL ENGINEERING SCIENCE, 2002, 57 (08) :1393-1407

[10]

Bowen WR, 2000, DESALINATION, V129, P163

← 1 2 3 4 5 →