The effect of mixing on stability and break-up of aggregates formed from aluminum sulfate hydrolysis products

Irina Solomentseva, S. Bárány, John Gregory

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The structure of aggregates formed from aluminum sulfate hydrolysis product particles (HPP), their stability, break-up and re-growth, under the action of shear (stirring the dispersion at different rates) have been studied. The effect of main variables such as the hydrolyzing salt dose, pH, alkalinity and ionic strength of the water on the growth, breakage and re-growth of HPP aggregates has been investigated. It has been shown that the aluminum sulfate hydrolysis product particles formed in a model water with parameters that facilitate appearance of small particles with relatively high charge and ζ-potential values, low degree of hydration and interaction of particles predominantly in the primary minimum, are stronger and more easily reformed after their breakage by intense stirring, than aggregates built of particles with lower charge, higher initial particle size and hydration, aggregating in the secondary minimum.

Original languageEnglish
Pages (from-to)34-41
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume298
Issue number1-2
DOIs
Publication statusPublished - Apr 20 2007

Fingerprint

hydrolysis
sulfates
Hydrolysis
aluminum
Aluminum
Hydration
products
Water
Alkalinity
Ionic strength
stirring
Salts
hydration
Particle size
alkalinity
Sulfates
aluminum sulfate
water
shear
salts

Keywords

  • Aggregates
  • Alkalinity
  • Aluminum sulfate
  • Break-up
  • Hydrolysis products
  • Ionic strength
  • pH
  • Re-growth
  • Salt dose
  • Shear
  • Stability

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

The effect of mixing on stability and break-up of aggregates formed from aluminum sulfate hydrolysis products. / Solomentseva, Irina; Bárány, S.; Gregory, John.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 298, No. 1-2, 20.04.2007, p. 34-41.

Research output: Contribution to journalArticle

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