TY - JOUR N2 - In the study, particle size distribution of the MIEX® resin was presented. Such analyses enable to determinate whether presence of fine resin fraction may be the reason for unfavorable membrane blocking during water purification by the hybrid MIEX®DOC – microfiltration/ultrafiltration systems. Granulometric analysis of resin grains using the laser diffraction particle size analyzer (laser granulometer) was carried out as well as the microscopic analysis with scanning electron microscope. The following samples were analyzed: samples of fresh resin (a fresh resin – not used in water treatment processes) and samples of repeatedly used/regenerated resin that were collected to analysis during mixing and after sedimentation process. Particle size distribution was slightly different for fresh resin and for repeatedly used/regenerated resin. The grains sizes of fresh resin reached approximately 60 μm (d10), 120 μm (d50) and 220 μm (d90). Whereas the sizes of repeatedly used/regenerated resin were about 15 μm (d10), 40 μm (d50) and 115-130 μm (d90). The smallest resin grains sizes were in the range of 0.3-0.45 μm. This ensures that the ultrafiltration membranes retain all resin grains, even the smallest ones. Whereas the microfiltration membranes must be appropriately selected to guarantee full separation of the resin grains and at the same time to exclude a membrane pores blocking. L1 - http://www.czasopisma.pan.pl/Content/107989/PDF/AMM-2018-3-09-Golombek.pdf L2 - http://www.czasopisma.pan.pl/Content/107989 PY - 2018 IS - No 3 EP - 1140 DO - 10.24425/123786 KW - ion exchange KW - MIEX® resin KW - water treatment KW - ultrafiltration KW - microfiltration KW - laser granulometer KW - SEM A1 - Rajca, M. A1 - Bray, R.T. A1 - Fitobór, K. A1 - Gołombek, K. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 63 DA - 2018.10.10 T1 - Laser Granulometer as an Useful Tool for Selection of Appropriate Membranes Used in the MIEX® DOC-UF/MF Hybrid Process SP - 1133 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/107989 T2 - Archives of Metallurgy and Materials ER -