Image talk:Moving bed reactor; zoom on ions.png

From BioMineWiki

Revision as of 13:51, 10 December 2007 by Admin (Talk | contribs)
(diff) ←Older revision | Current revision (diff) | Newer revision→ (diff)
Jump to: navigation, search
  1. Distribution of ions in moving bed columns (half-reactors) is not so simple because the sorption front occupies almost the whole length. So, I would diffuse grains of different colours along the columns. Andrei
    1. Now the front it is more diffused in both half-reactors. --Anna Bauer 14:51, 10 December 2007 (CET)
  2. Why do you write Fe2+? Isn't iron oxidised to Fe3+? Andrei
    1. I have exchanged Fe(II) to Fe(III) but I think anykind would do, depending on the redox and pH of the solution:
      • At basic pH: Fe(II) and Fe(III) insoluble
      • At neutral pH: Fe(II) is chemically stable if oxygen is not present. Fe(III) is insoluble
      • pH<3 makes Fe(II) chemically stable in solution
      • --Anna Bauer 14:51, 10 December 2007 (CET)
  3. If you want to have Cu2+ and Fe3+ ions, distribution of Fe3+ in the left column will be much shorter than Cu2+ and vise versa; i.e. Fe3+ will be much wider spread along the right column (do you need such details?:))Andrei
    1. Actually, this time I have avoided the problem since the rinsing step could actually wash out bound Fe(III) but still let Cu(II) stay bound. But it could be a point to have two pictures, one with your suggestions (which probably is more relevant if the purpose is to purify water); the other where Fe(III) is removed in the rinsing step (If purpose is to purify and concentrate Cu-ions)--Anna Bauer 14:51, 10 December 2007 (CET)
    2. Why would Fe(III) spread wider in the elution-step than the sorption step? --Anna Bauer 14:51, 10 December 2007 (CET)
Personal tools