Evaluation of Pore Structure and Electrical Properties of Nanofiltration Membranes

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Masanori Togoh¹  Shin-ichi Nakao¹  Shoji Kimura¹  Toshinori Tsuru¹  Xiao-Lin Wang¹ 

[1] Department of Chemical System Engineering, Faculty of Engineering, The University of Tokyo

关键词: Membrane Separation;    Filtration;    Nanofiltration;    Charged Membrane;    Pore Structure;    Steric-Hindrance Pore Model;    Charge Density;    Teorell-Meyer-Sievers Model;   

DOI  :  10.1252/jcej.28.186

来源: Maruzen Company Ltd

【 摘 要 】

References(24)Cited-By(104)Structural parameters and electrical properties of nanofiltration membranes (Desal-5, NF-40, NTR7450 and G-20) were determined with permeation experiments of aqueous solutions of neutral solutes (alcohols and saccharides having different molecular weights) and sodium chloride. The pore radii of these nanofiltration membranes were estimated to range from 0.4 to 0.8 nm based on the steric-hindrance pore model. Neither the constant surface charge density nor the constant surface electrical potential were suitable for interpreting NaCl concentration dependency of reflection coefficients. The fixed charge density of these membranes was evaluated on the basis of the Teorell-Meyer-Sievers model; a simple empirical equation was proposed to represent the dependency of the fixed charge density on NaCl concentration.

【 授权许可】

Unknown