2026-07-26T10:18:02Zhttps://www.radar-service.eu/oai/OAIHandler

10.35097/14202023-11-15T14:46:09Zradar4kit

10.35097/1420 Rhein, Frank Frank Rhein 0000-0002-7654-3824 Institut für Mechanische Verfahrenstechnik und Mechanik Hibbe, Leonard Leonard Hibbe Institut für Mechanische Verfahrenstechnik und Mechanik Nirschl, Hermann Hermann Nirschl Institut für Mechanische Verfahrenstechnik und Mechanik Karlsruhe Institute of Technology 2022 2023 Engineering SiO2 ZnO Zeta Potential Particle Particle Size Distribution Separation Magnetic Seeded Filtration Agglomeration Hetero-Agglomeration Open Access Creative Commons Attribution Non Commercial 4.0 International Rhein, Frank 0000-0002-7654-3824 Hibbe, Leonard Nirschl, Hermann The data set contains experimental data on the zeta potential and particle size distribution of SiO$_2$, ZnO and magnetic SiO$_2$-MAG particles. Additionally, experimental data on separation efficiency of magnetic seeded filtration experiments with varying ionic strength and pH is supplied. ## General Information 1. SiO2: Material: Quartz, Manufacturer: Quarzwerke GmbH, Product Name: SF800 2. ZnO: Material: ZnO, Manufacturer: Quarzwerke GmbH, Product Name: Silatherm 2. SiO2-MAG: Material: SiO2 / Fe3O4 composite, Manufacturer: Microparticles GmbH, Product Name: SiO2-MAG-AR1062 ## Particle Size Distribution For SiO2-MAG the distribution was measured with an analytical disc centrifuge (CPS Instruments), while ZnO and SiO2 were measured by laser diffraction (Helos, Sympatec). ## Zeta Potential All zeta potentials were measured at constant ionic strength I = 0.1M and constant volumetric particle concentration cv = 3.75e−3 vol-%. ## Magnetic Seeded Filtration Experiments Two individual studies (A and B) were performed. A mono-disperse silica-magnetite composite (SiO2-MAG) was used as magnetic seed material, while the non-magnetic particle system was varied between a poly-disperse SiO2 and poly-disperse ZnO powder. Stock suspensions of the dry particle systems were prepared by sonification with the Digital Sonifier 450 fromBranson Ultrasonics Co. (conditioning). A sample of the stock suspension *P_0* was taken and its actual concentration determined, taking deviations in preparation into account. Subsequently, the respective volumes of the stock suspensions to achieve the desired volume concentrations c_v were transferred into a snap-on lid vial. The suspension parameters ionic strength I and pH were adjusted by addition of 2M NaCl solution and 0.5M HCl or NaOH solution respectively. Finally, the experimental volume was filled to V=3mL with ultrapure water. The suspension was agitated for the agglomeration time t_A in the laboratory shaker Vortex Genius 3 from IKA GmbH. After agglomeration, a ferromagnetic separation matrix was immersed in the suspension and the vial was positioned next to a permanent magnet. Magnetic separation was performed for t_S=2min. A representative sample *P_E* was taken from the non-separated suspension and sonified again in order achieve comparable levels of dispersity. Samples *P_0* and *P_E* were analyzed via UV-VIS spectroscopy and the volume concentrations were determined through previously performed, substance- and system-specific calibrations. Separation success is quantified via the separation efficiency of the non-magnetic component defined as A_NM = 1 - (c_v,NM,E / c_v,NM,0). All experiments were measured in triplicate and the resulting standard deviation of the separation efficiency is also supplied. ## Note For more information on magnetic seeded filtration refer to publications by Rhein et al. 10.5445/IR/1000154994 application/x-tar