Journal Pre-Proof Flocculation of silica nanoparticles by natural, wood-based polyelectrolytes Kinga Grenda, Julien Arnold, José A.F. Gamelas, Olivier J. Cayre, Maria G. Rasteiro PII: S1383-5866(19)31668-5 DOI: https://doi.org/10.1016/j.seppur.2019.115888 Reference: SEPPUR 115888 To appear in: Separation and Purification Technology Received Date: 22 April 2019 Revised Date: 13 July 2019 Accepted Date: 2 August 2019 Please cite this article as: K. Grenda, J. Arnold, J.A.F. Gamelas, O.J. Cayre, M.G. Rasteiro, Flocculation of silica nanoparticles by natural, wood-based polyelectrolytes, Separation and Purification Technology (2019), doi: https:// doi.org/10.1016/j.seppur.2019.115888 This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. © 2019 Published by Elsevier B.V.