  The biosorption of Au(III) - Spirulina platensis and Au(III) - Arthrobacter
species (Arthrobacter globiformis and Arthrobacter oxidas) were studied at
simultaneous application of dialysis and atomic absorption analysis. Also
biosorption of Au(III) - Spirulina platensis at various pH were discussed.
Biosorption constants for Au-cyanobacteris Spirulina platensis at different pH,
and for Arthrobacter oxidas and Arthrobacter globiformis at pH=7.1 are :
  1. K=3.91 x 10-4 (Au- Arthrobacter oxidas 61B, pH=7.1)
  2. K=14.17 x 10-4 . (Au- Arthrobacter globiformis 151B, pH=7.1).
  3. K=2.07x10-4 (Au- Spirulina platensis, pH=7.1)
  4. K= 4.87x10-4 (Au- Spirulina platensis, pH=6.2)
  5. K=8.7x10-4 (Au- Spirulina platensis, pH=8.4)
