Size distribution of aluminum hydroxide flocs in dilute aluminum(III) solutions

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Electronic particle counting and sizing technique was used in this study to characterize the particle size distribution of Al(OH)3(S) precipitates that are produced from AlCl3, Al2(SO4)3 and two preformed polymeric aluminum salts (polyaluminum chloride and polyaluminum sulfate) solutions. Results indicate that polyaluminum chloride solutions tend to form a large number of small particles with a relative dense structure. On the other hand, alum and polyaluminum sulfate form large particles with a loose structure and which dominate the particle volume distribution. The repulsive electrostatic barrier between primary particles is suggested to be the main factor affecting the particle growth for different Al salt solutions.

Original languageEnglish
Pages (from-to)363-371
Number of pages9
JournalToxicological and Environmental Chemistry
Issue number3-4
Publication statusPublished - 1999 Jan 1

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

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