The role of membrane ξ-potential in solute rejection by low-pressure reverse osmosis membrane

被引：3

作者：

Ozaki, H ^{[1
]}

Ikejima, N ^{[1
]}

Matsui, S ^{[1
]}

Terashima, Y ^{[1
]}

Takeda, S ^{[1
]}

Tari, I ^{[1
]}

Li, H ^{[1
]}

机构：

[1] Osaka Sangyo Univ, Dept Civil Engn, Osaka 5748530, Japan

来源：

3RD WORLD WATER CONGRESS: DRINKING WATER TREATMENT | 2002年 / 2卷 / 5-6期

关键词：

dissociation constant; low pressure reverse osmosis (LPRO) membrane; membrane separation; membrane x-potential; streaming potential method;

D O I：

10.2166/ws.2002.0186

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A new generation of reverse osmosis membranes, low-pressure reverse osmosis (LPRO) membranes, have been developed for operation under very low pressure (below 0.5 MPa). LPRO membranes have received attention especially for their application in the field of water and wastewater treatment, to provide a high water flux at low operating pressure while maintaining very good rejection levels of salts and organics. Our previous work on LPRO has shown that the rejection of some inorganic salts and organic compounds depends appreciably on the pH of the bulk solution, probably because LPRO membranes can have an electric charge. In this study we investigated experimentally the effectiveness of different LPRO membranes in separating inorganic salts and organic compounds from a bulk solution with different pH conditions. We also tried to measure membrane xi-potential by using a streaming potential method. The results indicated that the membrane xi-potential as well as the ion: size or molecular weight of organics can be considered key factors in the rejection of ionic salts and dissociated organic compounds including pesticides and endocrine disruptors.

引用

页码：321 / 328

页数：8

共 6 条

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