Low-frequency ultrasound to improve dead-end ultrafiltration performance

被引：38
|
作者：
Simon, A [1 ]
Gondrexon, N [1 ]
Taha, S [1 ]
Cabon, J [1 ]
Dorange, G [1 ]
机构：
[1] ENSCR, Lab Chim Eaux & Environm, F-35700 Rennes, France
来源：
SEPARATION SCIENCE AND TECHNOLOGY | 2000年 / 35卷 / 16期
关键词：
dead-end ultrafiltration; ultrasound; flux enhancement; boundary layer; resistances-in-series model;
D O I：
10.1081/SS-100102359
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Low-frequency ultrasound (20 kHz) has been used to facilitate dead-end ultrafiltration of polymer solutions. The influence of ultrasonic irradiation on permeate fluxes and retention ratios was investigated and compared with conventional stirred and unstirred operations. In addition, the effect of the ultrasonic field on the membrane permeability and on the polymer solution was examined. The efficiency of ultrasound in enhancing ultrafiltration performance was demonstrated. This improvement is due to a decrease of the boundary layer resistance against permeation flow, which may be attributed to disturbance induced within the cell and at the membrane surface by physical effects associated with ultrasonic waves propagation.
引用
收藏
页码：2619 / 2637
页数：19
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