Effects of pH and Ionic Strength on Colloidal Fouling of Charged Nanofiltration Membranes

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Dipankar Nanda¹  Shu-Hsien Huang¹  Yu-Ling Li¹  Nien-Jung Lin¹  Ching-Jung Chuang¹  Kueir-Rarn Lee¹  Kuo-Lun Tung¹ 

[1] R&D Center for Membrane Technology and Department of Chemical Engineering, Chung Yuan University

关键词: Fouling;    Fouling Index;    Colloidal Silica;    Nanofiltration;    Donnan Effect;   

DOI  :  10.1252/jcej.11we050

来源: Maruzen Company Ltd

【 摘 要 】

References(38)Cited-By(4)The fouling potential of a colloidal silica suspension as the feed phase at varied solution chemistry has been investigated using negatively charged polyamide thin-film-composite nanofiltration (NF) membranes. Specifically, the effects of solution chemistry, feed pH and ionic strength, and colloidal particle size on the fouling potential measurement have been investigated. The effect of pH on the measurement of the fouling potential is different for different membranes. An alkaline feed solution pH is preferred because of its minimal tendency to foul the membranes. Colloidal size does not have a remarkable effect on the fouling potential measurement for the size range studied herein (about 10 nm), but larger particles result in less fouling, as observed normally. Ionic strength also plays an important role in the fouling of silica colloid suspensions, with lower ionic strength resulting less fouling.

【 授权许可】

Unknown