UNIGE document Scientific Article
previous document  unige:103251  next document
add to browser collection
Title

Probing effects of polymer adsorption in colloidal particle suspensions by light scattering as relevant for the aquatic environment: An overview

Authors
Published in Science of the Total Environment. 2015, vol. 535, p. 131-140
Abstract Modification of particle surfaces by adsorption of polymers is a process that governs particle behavior in aqueous environmental systems. The present article briefly reviews the current understanding of the adsorption mechanisms and the properties of the resulting layers, and it discusses two environmentally relevant cases of particle modification by polymers. In particular, the discussion focuses on the usefulness of methods based on light scattering to probe such adsorbed layers together with the resulting properties of the particle suspensions, and it highlights advantages and disadvantages of these techniques. Measurement of the electrophoretic mobility allows to follow the development of the adsorption layer and to characterize the charge of the modified particles. At saturation, the surface charge is governed by the charge of the adsorbed film. Dynamic light scattering provides information on the film thickness and on the behavior of the modified suspensions. The charge and the structure of the adsorbed layer influence the stability of the particles, as well as the applicability of the classical theory of Derjaguin, Landau, Verwey, and Overbeek (DLVO). This fundamental knowledge is presented in the light of environmental systems and its significance for applied systems is underlined. In particular, the article discusses two examples of environmental processes involving adsorption of polymers, namely, the modification of particles by natural adsorption of humic substances and the tailoring of surface properties of iron-based particles used to remediate contaminated aquifers.
Keywords AdsorptionPolyelectrolytesParticlesOrganic matterHumic substancesNanoscale zerovalent ironPolymersLight scattering
Identifiers
Full text
Structures
Research group Groupe Borkovec
Citation
(ISO format)
TIRAFERRI, Alberto, BORKOVEC, Michal. Probing effects of polymer adsorption in colloidal particle suspensions by light scattering as relevant for the aquatic environment: An overview. In: Science of the Total Environment, 2015, vol. 535, p. 131-140. https://archive-ouverte.unige.ch/unige:103251

60 hits

0 download

Update

Deposited on : 2018-03-28

Export document
Format :
Citation style :