BROWSE

Related Researcher

Author's Photo

Kwon, Young-Nam
Superior Membrane-based Advanced Research & Technology (SMART) Lab
Research Interests
  • Membrane, Reverse(Forward) osmosis, Membrane distillation, Hydrate-induced ice desalination

ITEM VIEW & DOWNLOAD

The chlorination mechanism of integrally asymmetric cellulose triacetate (CTA)-based and thin film composite polyamide-based forward osmosis membrane

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
The chlorination mechanism of integrally asymmetric cellulose triacetate (CTA)-based and thin film composite polyamide-based forward osmosis membrane
Author
Nguyen, Thi Phuong NgaJun, Byung-MoonKwon, Young-Nam
Issue Date
2017-02
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v.523, pp.111 - 121
Abstract
This study investigates the change in performance and properties of various forward osmosis (FO) membranes resulting from exposure to chlorine by conducting performance test and characterization using ATR-FTIR, XPS, zeta potential, NMR and, particularly, ToF-SIMS analyses. The data obtained through the ToF-SIMS measurements suggested that chlorine first reacted with the acetyl/acetate group of the cellulose triacetate (CTA)-based membrane and then with the pyranose ring. Chlorine bound to the membrane surface weakened the H-bond of the CTA-based membrane, resulting in an increase in water flux and reverse salt flux (RSF) as the chlorine exposure time or chlorine concentration increased. A high chlorine dosage cleaved the pyranose ring, leading to loss of membrane selectivity. After chlorination with a high chlorine dosage, the structure of the CTA-based membrane eventually presented fatigue upon an increase in filtration time, and the oxidation of the CTA-based membrane due to exposure to chlorine was maximal at pH 7. The polyamide (PA)-based FO membrane was more sensitive to chlorine under acidic conditions, resulting in a greater loss of selectivity than that of the CTA-based FO membrane. However, an alkaline chlorine solution insignificantly affected both the CTA-based and TFC-based FO membranes. This study shows that the TFC PA-based FO membrane yields a high water flux, but its chlorine tolerance must be improved to be practically applicable in various fields.
URI
https://scholarworks.unist.ac.kr/handle/201301/20668
URL
http://www.sciencedirect.com/science/article/pii/S0376738816316234
DOI
10.1016/j.memsci.2016.09.020
ISSN
0376-7388
Appears in Collections:
UEE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU