Experimental study on separation performance of nanofiltration membranes for bicarbonate salts solution

被引:6
|
作者
Wu, Ling [1 ]
Song, Lei [2 ]
Wang, Xiao-Lin [1 ]
Tomi, Yasuhiro [3 ]
Ando, Masaaki [3 ]
Ohara, Tomomi [3 ]
Shintani, Takuji [4 ]
机构
[1] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
[2] China Univ Min & Technol, Sch Chem & Environm Engn, Beijing 100083, Peoples R China
[3] Nitto Denko Corp, Membrane Div, Shiga 5250042, Japan
[4] Nitto Denko Corp, Core Technol Ctr, Osaka 5678680, Japan
关键词
Nanofiltration; Weak electrolyte; Bicarbonate salts; REJECTION; IONS;
D O I
10.1016/j.desal.2007.10.080
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The primary goal of this paper is to investigate the separation performance of bicarbonate salts through nanofiltration (NF) membrane LES 90. The experiment results indicate that the observed transmissions of total carbon (TC) at pH 7 are much higher than that at pH 8.3. This phenomenon can be explained by the dynamical equilibrium of weak electrolyte. The observed transmissions of both HCO3- and H2O center dot CO2 are calculated. The regulation of observed transmissions of HCO3- with flux and concentration is similar to the single-charged strong electrolyte anions, while the observed transmissions of H2O center dot CO2 keep almost unchanged at an average value of 0.81. Finally the fraction summation model proposed in Our previous paper is applied, resulting in good agreement with the experiment results.
引用
收藏
页码:299 / 305
页数:7
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