York 2009.pdf (258.74 kB)
Combined ion exchange and microfiltration
conference contribution
posted on 2010-01-08, 15:09 authored by Marijana M. Dragosavac, Richard Holdich, Goran VladisavljevicGoran VladisavljevicThe purpose behind this work is to produce polystyrene-divinylbenzene cation exchange resin particles at
various sizes, smaller than are conventionally available, and to use them in a microfiltration process;
comparing the results with conventional column operation. As a model system, for production of droplets
using membrane emulsification, sunflower oil (discontinuous phase) and 2% Tween 20 solution (continuous
phase) were used. By increasing the shear at the membrane surface the droplet size decreased from 185 to
50 μm. In the seeded microfiltration process, surface microfilters with slots without internal tortuosity were
used to minimize fouling. A filtration flux rate of 3432 l m-2 h-1 was achieved. Rates of copper sorption on to
ion exchange resin were found to be dependent on mass transport limitations due to aqueous film diffusion
and internal particle diffusion. For prediction of copper sorption a model that takes into account both film and
internal diffusion was used. Microfiltration combined with ion exchange has the advantage of very fast
kinetics, when compared to column use, and may provide better utilization of the resin particle, depending on
the internal diffusion coefficient of the transferring species within the particle.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Citation
DRAGOSAVAC, M.M., HOLDICH, R.G. and VLADISAVLJEVIC, G., 2009. Combined ion exchange and microfiltration. DIAMOND’09 Conference Decommissioning, Immobilisation and Management of Nuclear Waste for Disposal, 9-10 September 2009, York, UK.Publication date
2009Notes
This conference paper was presented at DIAMOND'09: http://www.diamondconsortium.org/Language
- en