Fouling mechanism and cleanability of ultrafiltration membranes modified with polydopamine-graft-PEG

Authors

  • Fang Li 1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; 2. State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
  • Chunhua Deng 1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; 2. Department of Environmental Science, Baylor University, Waco, TX 76798, USA
  • Chunhui Du Department of Environmental Science, Baylor University, Waco, TX 76798, USA
  • Bo Yang 1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; 2. State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China
  • Qing Tian 1. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; 2. State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, Shanghai 201620, China

DOI:

https://doi.org/10.4314/wsa.v41i4.03

Keywords:

polydopamine, organic matters, PEG, fouling mechanism.

Abstract

Membrane surface modification via grafting poly(ethylene glycol) (PEG) onto the coated polydopamine (PD) layer is an attractive strategy because it can improve the hydrophilicity of the membrane surface. Sodium alginate (SA), bovine serum albumin (BSA), and humic acid (HA) were used as model foulants to investigate the fouling mechanism and cleanability of modified membranes. The modification narrowed or blocked the membrane pores, which led to a reduction in the permeability of ultrafiltration membranes. A Hermia model was used to explore the fouling mechanism of the modified membranes. PD-g-PEG modified membranes exhibit a lower adsorption for the model foulants and a better cleanability than the unmodified membranes.

Downloads

Download data is not yet available.

Downloads

Published

2015-07-24

Issue

Vol. 41 No. 4 July (2015): Water SA

Section

Research paper

License

Copyright (c) 2022 Fang Li, Chunhua Deng, Chunhui Du, Bo Yang, Qing Tian

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Creative Commons License

The content of this journal is licensed under a Creative Commons Attribution Licence.  Users are permitted to read, download, copy, distribute, print, search or link to the full texts of the articles in this journal under the terms of this Licence, without asking prior permission from the publisher or the author, provided the source is attributed. Copyright is retained by the authors.

How to Cite

Fang Li (2015) “Fouling mechanism and cleanability of ultrafiltration membranes modified with polydopamine-graft-PEG”, Water SA, 41(4 July). doi:10.4314/wsa.v41i4.03.