| 摘要 |
PURPOSE:To easily reduce silver ions to several mug/l or below, by removing silver ions contained in an aqueous solution by using a chelate resin having a functional group containing a thiol radical. CONSTITUTION:Dissolved silver concentration can be reduced to several mug/l or below by bringing a silver-containing aqueous solution of copper into contact with a chelate resin having a functional group containing a thiol (-SH) radical. For example, the chelate resin is deaerated, 1N hydrochloric acid is added to the above, and the mixture is agitated for 1hr and then washed thoroughly with pure water. The resulting resin is added by 50ml to a 500ml of solution acidified with sulfuric acid containing 45g/l copper, 0.26mg/l silver, and 50g/l sulfuric acid, which is agitated at slow speed at 50 deg.C for 1hr.
|
