Investigating fouling at the pore-scale using a microfluidic membrane mimic filtration system

被引：27

作者：

Debnath, Nandini ^{[1
]}

Kumar, Aloke ^{[2
]}

Thundat, Thomas ^{[3
,4
]}

Sadrzadeh, Mohtada ^{[1
]}

机构：

[1] Univ Alberta, Dept Mech Engn, Adv Water Res Lab, 10-367 Donadeo Innovat Ctr Engn, Edmonton, AB T6G 1H9, Canada

[2] Indian Inst Sci, Dept Mech Engn, Bangalore, Karnataka, India

[3] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G8, Canada

[4] Univ Buffalo, Sch Engn & Appl Sci, Dept Chem & Biol Engn, Buffalo, NY 14260 USA

来源：

SCIENTIFIC REPORTS | 2019年 / 9卷 / 1期

基金：

加拿大自然科学与工程研究理事会;

关键词：

WASTE-WATER TREATMENT; COLLOIDAL PARTICLES; FLOW; MODEL; FLUX; ULTRAFILTRATION; DEPOSITION; STREAMERS; MICROFILTRATION; REJECTION;

D O I：

10.1038/s41598-019-47096-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The work investigates fouling in a microfluidic membrane mimic (MMM) filtration system for foulants such as polystyrene particles and large polymeric molecules. Our MMM device consists of a staggered arrangement of pillars which enables real-time visualization and analysis of pore-scale phenomena. Different fouling scenarios are investigated by conducting constant-pressure experiments. Fouling experiments are performed with three different types of foulants: polystyrene particle solution (colloidal fouling), polyacrylamide polymer solution (organic fouling) and a mixture of these two solutions (combined fouling). Four major categories of microscopic fouling are observed: cake filtration (upstream), pore blocking (inside the pores), colloidal aggregation (downstream) and colloidal streamer fouling (downstream). Our microfluidic experiments show that downstream colloidal aggregation and streamer fouling have a significant effect on overall membrane fouling which were not studied before.

引用

页数：10

共 53 条

[1] Colloidal Fouling of Nanofiltration Membranes: Development of a Standard Operating Procedure [J].