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 language | English |
|---|---|
| Pages (from-to) | 34-41 |
| Number of pages | 8 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 298 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Apr 20 2007 |
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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 journal › Article
}
TY - JOUR
T1 - The effect of mixing on stability and break-up of aggregates formed from aluminum sulfate hydrolysis products
AU - Solomentseva, Irina
AU - Bárány, S.
AU - Gregory, John
PY - 2007/4/20
Y1 - 2007/4/20
N2 - 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.
AB - 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.
KW - Aggregates
KW - Alkalinity
KW - Aluminum sulfate
KW - Break-up
KW - Hydrolysis products
KW - Ionic strength
KW - pH
KW - Re-growth
KW - Salt dose
KW - Shear
KW - Stability
UR - http://www.scopus.com/inward/record.url?scp=33947117789&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947117789&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2006.12.016
DO - 10.1016/j.colsurfa.2006.12.016
M3 - Article
VL - 298
SP - 34
EP - 41
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
IS - 1-2
ER -