Influence of particle concentration on initial collection efficiency and surface coverage in porous media filtration

Ng, Wai K., Jegatheesan, Veeriah, and Lee, Seung-Hwan (2006) Influence of particle concentration on initial collection efficiency and surface coverage in porous media filtration. Korean Journal of Chemical Engineering, 23 (2). pp. 333-342.

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Four sizes (0.095, 0.53, 1.0 and 2.01 µm) of polystyrene latex particles were used to prepare monodispersed suspensions at three different ionic strengths (103,10-2.5 and 10-2 M KCl). Filtration experiments were conducted using those suspensions in a filter column with glass beads as porous medium. The filter bed depth and the filtration velocity were kept at 5 cm and 1 m/h, respectively. When suspensions with equal mass concentrations (0.2 mg/L) or equal surface area concentrations (0.12 cm2/mL) were filtered through the system, the largest particles exhibited higher initial single collector efficiency. The difference between the Ç of largest particles and the smaller particles was prominent for suspensions with equal surface area concentrations at higher ionic strengths. The collision efficiency,α of those particles exhibits higher values at higher ionic strengths. Both at equal mass concentration and equal surface area concentration,α is only slightly dependent on particle sizes when compared to its dependence on ionic strength. Further, it was found that the specific surface coverage was similar for 0.095 µm, 0.53 µm and 1.0 µm particles during the transient stage of filtration at any ionic strength when the surface area concentrations of those suspension were equal.

Item ID: 4039
Item Type: Article (Research - C1)
ISSN: 1975-7220
Keywords: collision efficiency; initial single collector efficiency; ionic strength; latex particles; porous media filtration; specific surface coverage
Date Deposited: 12 Nov 2009 05:24
FoR Codes: 09 ENGINEERING > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies @ 50%
09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 50%
SEO Codes: 96 ENVIRONMENT > 9609 Land and Water Management > 960999 Land and Water Management of Environments not elsewhere classified @ 100%
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