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DC Field | Value | Language |
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dc.citation.endPage | 216 | - |
dc.citation.number | 1-3 | - |
dc.citation.startPage | 213 | - |
dc.citation.title | DESALINATION | - |
dc.citation.volume | 188 | - |
dc.contributor.author | Cho, Jaeweon | - |
dc.contributor.author | Kim, In S. | - |
dc.contributor.author | Moon, Jihee | - |
dc.contributor.author | Kwon, Boksoon | - |
dc.date.accessioned | 2023-12-22T10:08:16Z | - |
dc.date.available | 2023-12-22T10:08:16Z | - |
dc.date.created | 2015-07-01 | - |
dc.date.issued | 2006-02 | - |
dc.description.abstract | Membrane filtration for sustainable wastewater reuse has been encountering particle deposition (i.e., particle cake fouling) with mostly micron-sized particles including bacteria, and nano-sized colloids/particles as well. Particle size may influence membrane fouling and flux decline through cake formation as particles with different sizes exhibit different back diffusivity and packing density of the cake. A theoretical diffusivity equation was proposed by Einstein (1906) [1]; thermodynamic and drag (i.e., resistance or mobility relation) forces were compared in equilibrium. The diffusivity relationship, ratio of thermodynamic and drag forces, was combined with steady-state convection and diffusion equation and finally came up with a relationship between retention times from flow field-flow-fractionation (f1-FFF) and diffusivity of a particle. An asymmetric f1-FFF system (Postnova, Germany) equipped with a regenerated cellulose membrane with molecular weight cutoff of 1,000 molecular mass and a micro-channel employing both laminar channel and cross flows, was used to obtain chromatography using an UV detector. A wide range of colloids and particles were used; both traceable polymer and latex microsphere colloids/particles with nominal diameters of 0.09 (i.e., 90 rim), 0.152, 0.2, 0.5, 0.701, 0.82, 0.993, 1.0 mu m (Duke Scientific, US), and micro silica particles with nominal diameters of 3.0, 6.0, 10.0 mu m (Nanotech, Korea). Each colloid or particle was characterized in terms of either its size or diffusivity with analyses of chromatography obtained from f1-FFF. It was found in this work that ca. 0.5 mu m is a critical size below and above which diffusivity of a particle increases (i.e., particle of 0.5 mu m has a minimum diffusivity). An empirical equation for the shear-induced diffusivity will be suggested in the presentation based on the results obtained from the fl-FFF. There may be many important implications on this observation; for example, bacteria with a 0.5 mu m size may provide significant cake deposition and subsequently flux decline and possibly bio-fouling. These nano-/micro-size and diffusivity information is being investigated in conjunction with membrane filtration with the corresponding particles and various membranes | - |
dc.identifier.bibliographicCitation | DESALINATION, v.188, no.1-3, pp.213 - 216 | - |
dc.identifier.doi | 10.1016/j.desal.2005.04.119 | - |
dc.identifier.issn | 0011-9164 | - |
dc.identifier.scopusid | 2-s2.0-31344473416 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/11783 | - |
dc.identifier.url | http://www.sciencedirect.com/science/article/pii/S001191640600052X?np=y | - |
dc.identifier.wosid | 000235798900025 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title | Determining Brownian and shear-induced diffusivity of nano- and micro-particles for sustainable membrane filtration | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | diffusivity | - |
dc.subject.keywordAuthor | nano colloid | - |
dc.subject.keywordAuthor | micro particle | - |
dc.subject.keywordAuthor | sustainable membrane filtration | - |
dc.subject.keywordPlus | TRANSPORT | - |
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