Difference between revisions of "Team:Aix-Marseille/Integrated Practices/Process"

(Quantities of DHOB per µg of platinum)
(Quantities of DHOB per µg of platinum)
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An experiment of leaching at pH 8.2 during 120h using DFHOB was carried out on '''100g''' of platinum whose concentration was approximately '''5ppm'''. The  maximum efficiency of leaching by siderophore has reached a value of 50% with a DHOB concentration of 3mM (higher concentration lead to a lower efficiency). If we combined the value of leaching occured with the drop of pH (in the study by Hcl treatment, in our case with ''Thiobacillus'') and the value occurred with leaching, we reach a value of 78% of the total platinum leached.  
 
An experiment of leaching at pH 8.2 during 120h using DFHOB was carried out on '''100g''' of platinum whose concentration was approximately '''5ppm'''. The  maximum efficiency of leaching by siderophore has reached a value of 50% with a DHOB concentration of 3mM (higher concentration lead to a lower efficiency). If we combined the value of leaching occured with the drop of pH (in the study by Hcl treatment, in our case with ''Thiobacillus'') and the value occurred with leaching, we reach a value of 78% of the total platinum leached.  
  
==>  100g at 5ppm => 5µg/g, so '''500µg''' of pure platinum. 3mM of DFHOB= 1.68 g. So we have roughly (1.68/500) = '''3.36mg of DFHOB/µg of platinum'''  
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==>  100g at 5ppm => 5µg/g, so '''500µg''' of pure platinum. 3mM of DFHOB= 1.68 g given the DFHOB molar mass= 560g.mol. So we have roughly (1.68/500) = '''3.36mg of DFHOB/µg of platinum'''  
  
  

Revision as of 21:03, 20 September 2016