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Cho, Jaeweon
도시환경 감각연구소/Sense Laboratory
Research Interests
  • Convergence of Science and Arts; Environment Ethics; Meta-modernism in Semantics Engineering

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Characterizations of NOM included in NF and UF membrane permeates

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Title
Characterizations of NOM included in NF and UF membrane permeates
Author
Lee, SangyoupKwon, BoksoonSun, MminjungCho, Jaeweon
Keywords
Biodegradability; DBP reactivity; Nanofiltration/ultrafiltration; NOM characteristics; Size/structure/ functionality; SUVA
Issue Date
2005-03
Publisher
ELSEVIER SCIENCE BV
Citation
DESALINATION, v.173, no.2, pp.131 - 142
Abstract
The characteristic changes in the natural organic matter (NOM), from the feed to the permeate, due to nanofiltration (NF) and tight-ultrafiltration (UF), were investigated in terms of size (molecular weight), structure (hydrophobic and hydrophilic fractions), and functionality (charge density in terms of carboxylic acidity). These characteristic changes were expected to be associated with the reactivity of the disinfection by-products (DBP), fractions of biodegradable dissolved organic carbon (BDOC), and assimilable organic carbon (AOC) relative to the total organic carbon. The BDOC and AOC analyses demonstrated that the NOM included in the NF and tight-UF permeates were more biodegradable than those included in the feed waters, which were relatively hydrophilic and smaller, than those in the feed waters. The influence of the hydrodynamic operating condition in terms of the J(o)/k ratio on the characteristics of the NOM included in the NF and tight-UF permeates was also demonstrated. In addition, the effects of the pH, ionic strength, and calcium ions on the specific UV absorbance (SUVA) values of the NOM in each of the feed and permeate waters, were demonstrated for a better understanding of the above characteristic changes, and to determine the applicability of the SUVA analysis for the characterization of the NOM
URI
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DOI
10.1016/j.desal.2004.08.030
ISSN
0011-9164
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