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

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The role of foulant-foulant electrostatic interaction on limiting flux for RO and NF membranes during humic acid fouling-Theoretical basis, experimental evidence, and AFM interaction force measurement

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dc.contributor.author Tang, Chuyang Y. ko
dc.contributor.author Kwon, Young-Nam ko
dc.contributor.author Leckie, James O. ko
dc.date.available 2014-04-10T01:19:43Z -
dc.date.created 2013-05-30 ko
dc.date.issued 2009-01 ko
dc.identifier.citation JOURNAL OF MEMBRANE SCIENCE, v.326, no.2, pp.526 - 532 ko
dc.identifier.issn 0376-7388 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/3054 -
dc.description.abstract A limiting flux model has been recently developed for predicting the fouling behavior of reverse osmosis and nanofiltration membranes by organic macromolecules [C.Y. Tang, J.O. Leckie, Membrane independent limiting flux for RO and NF membranes fouled by humic acid, Environmental Science and Technology 41 (2007) 4767-4773]. Several interesting results have been observed: (a) there was a maximum pseudostable flux (the limiting flux) beyond which further increase in applied pressure did not translate to a greater stable flux; (b) all membrane samples attained the limiting flux under constant pressure conditions as long as their initial flux was greater than the limiting flux; (c) the limiting flux did not depend on the properties of membranes; (d) the limiting flux had strong dependence on the feedwater composition, such as pH, ionic strength, and divalent ion concentration. The current study investigates the dependence of limiting flux on intermolecular interaction between foulant molecules. It was observed that the limiting flux was directly proportional to the intermolecular electrostatic repulsive force and that conditions enhancing foulant-deposited-foulant repulsion resulted in greater limiting flux values. Such observations agree well with a theoretical model capturing both hydrodynamic and DLVO interactions. Interaction force measurements by atomic force microscopy (AFM) were also performed. The limiting flux correlated reasonably well with AFM interaction force between the model foulant and the fouled membrane surface. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher ELSEVIER SCIENCE BV ko
dc.title The role of foulant-foulant electrostatic interaction on limiting flux for RO and NF membranes during humic acid fouling-Theoretical basis, experimental evidence, and AFM interaction force measurement ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-58149200926 ko
dc.identifier.wosid 000263006500033 ko
dc.type.rims ART ko
dc.description.wostc 36 *
dc.description.scopustc 35 *
dc.date.tcdate 2015-02-28 *
dc.date.scptcdate 2014-07-12 *
dc.identifier.doi 10.1016/j.memsci.2008.10.043 ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=58149200926 ko
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