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@ARTICLE{Roa:829413,
      author       = {Roa, Rafael and Menne, Daniel and Riest, Jonas and Buzatu,
                      Pompilia and Zholkovskiy, Emiliy K. and Dhont, Jan K. G. and
                      Wessling, Matthias and Naegele, Gerhard},
      title        = {{U}ltrafiltration of charge-stabilized dispersions at low
                      salinity},
      journal      = {Soft matter},
      volume       = {12},
      number       = {20},
      issn         = {1744-6848},
      address      = {London},
      publisher    = {Royal Soc. of Chemistry},
      reportid     = {FZJ-2017-03117},
      pages        = {4638 - 4653},
      year         = {2016},
      abstract     = {We present a comprehensive study of cross-flow
                      ultrafiltration (UF) of charge-stabilized suspensions, under
                      low-salinity conditions of electrostatically strongly
                      repelling colloidal particles. The axially varying permeate
                      flux, near-membrane concentration-polarization (CP) layer
                      and osmotic pressure profiles are calculated using a
                      macroscopic diffusion-advection boundary layer method, and
                      are compared with filtration experiments on aqueous
                      suspensions of charge-stabilized silica particles. The
                      theoretical description based on the one-component macroion
                      fluid model (OCM) accounts for the strong influence of
                      surface-released counterions on the renormalized colloid
                      charge and suspension osmotic compressibility, and for the
                      influence of the colloidal hydrodynamic interactions and
                      electric double layer repulsion on the
                      concentration-dependent suspension viscosity η, and
                      collective diffusion coefficient Dc. A strong
                      electro-hydrodynamic enhancement of Dc and η, and likewise
                      of the osmotic pressure, is predicted theoretically, as
                      compared with their values for a hard-sphere suspension. We
                      also point to the failure of generalized Stokes–Einstein
                      relations describing reciprocal relations between Dc and η.
                      According to our filtration model, Dc is of dominant
                      influence, giving rise to an only weakly developed CP layer
                      having practically no effect on the permeate flux. This
                      prediction is quantitatively confirmed by our UF
                      measurements of the permeate flux using an aqueous
                      suspension of charged silica spheres as the feed system. The
                      experimentally detected fouling for the largest considered
                      transmembrane pressure values is shown not to be due to
                      filter cake formation by crystallization or vitrification.},
      cin          = {ICS-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000377123700018},
      pubmed       = {pmid:27113088},
      doi          = {10.1039/C6SM00660D},
      url          = {https://juser.fz-juelich.de/record/829413},
}