File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

조재원

Cho, Jaeweon
Sense Laboratory
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Combined influence of natural organic matter (NOM) and colloidal particles on nanofiltration membrane fouling

Author(s)
Lee, SangyoupCho, JaeweonElimelech, Menachem
Issued Date
2005-10
DOI
10.1016/j.memsci.2005.03.043
URI
https://scholarworks.unist.ac.kr/handle/201301/11888
Fulltext
http://www.sciencedirect.com/science/article/pii/S0376738805002735
Citation
JOURNAL OF MEMBRANE SCIENCE, v.262, no.1-2, pp.27 - 41
Abstract
The combined influence of natural organic matter (NOM) and colloidal particles on the fouling of thin-film composite nanofiltration (NF) membranes is systematically investigated. Combined fouling is compared to the individual fouling behaviors (i.e., colloid or NOM alone) with respect to fouling mechanisms and the effect of concentration factor (or recovery). Results demonstrate that (1) "cake-enhanced osmotic pressure" (CEOP) is a key fouling mechanism for individual colloidal fouling, (2) NOM-calcium complexation is the dominant factor governing individual NOM fouling, and (3) combined fouling is affected by both CEOP and NOM-calcium complexation. The extent of flux decline for combined fouling, however, is less than what inferred from additivity of the individual contributions of colloidal and NOM fouling to flux decline. This observation implies that the contributions of the fouling mechanisms appear to be relatively less significant for combined fouling compared to their separate influences on individual colloidal and NOM fouling. An increase in colloidal stability in presence of NOM and the competition between colloids and NOM for calcium are likely explanations for this behavior. It is further shown that NF membrane salt rejection increases noticeably in case of combined fouling compared to individual colloidal fouling due to the formation of an active rejecting layer by the accumulated NOM on the membrane surface. Results from combined fouling runs involving EDTA treatment confirm that both CEOP and NOM-calcium complexation take place simultaneously. (c) 2005 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE BV
ISSN
0376-7388
Keyword (Author)
colloidal foulingNOM foulingorganic foulingcombined foulingcake-enhanced osmotic pressure
Keyword
REVERSE-OSMOSIS MEMBRANESAQUATIC HUMIC SUBSTANCESWATER-TREATMENTFLUX DECLINEULTRAFILTRATIONREJECTIONMECHANISMSFILTRATIONSTABILITYRECOVERY

qrcode

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