Influence of the Rheology Behavior of Water-Soluble Polyacrylamides and Their Efficiency of Flocculation
Journal Article
·
· Journal of Polymers and the Environment
- Federal University of Rio Grande do Sul, Polymeric Materials Lab, Materials Engineering Department (Brazil)
- Federal University of Health Sciences of Porto Alegre, Nutrition Departament (Brazil)
Organic polymers such as water-soluble polyacrylamides that are used as flocculants in solid–liquid separations, have their flocculation efficiency determined by the behavior of their macromolecules in solution. This behavior is affected by its intrinsic characteristics, especially the presence of ionic groups in its macromolecules. In this context, the present work aimed to characterize three water-soluble polyacrylamides. The effect of the intrinsic properties of each polymer on the behavior of the polymer chains in aqueous solution was compared in different environments. Beside this, the polymers behavior effect on the destabilization of particles was evaluated through kaolin particle aggregation studies. Viscosity results show that the conformation of the macromolecules in solution is altered according to the amount of ionized groups present. This variation, together with other factors such as the affinity with the kaolin particles and the excess of ions in solution, reflects in the flocculation efficiency of kaolin particles, in the flocs size and the flocs sedimentation rate. Graphic Abstract: .
- OSTI ID:
- 22977037
- Journal Information:
- Journal of Polymers and the Environment, Journal Name: Journal of Polymers and the Environment Journal Issue: 10 Vol. 27; ISSN 1566-2543
- Country of Publication:
- United States
- Language:
- English
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