| abstract |
In the treatment of arsenic contained in the non-ferrous smelting intermediate product, in particular in the treatment of arsenic in the form of sulfides, it satisfies the elution standard (according to the notice of the Environmental Office notice 13), and also has excellent filterability and stable scorodite with good reproducibility and complexity. It provides a simple way of creating without manipulation. A leaching step of leaching arsenic in a weakly acidic region from a non-ferrous smelting intermediate product containing arsenic, a liquid adjusting step of oxidizing trivalent arsenic to pentavalent arsenic by adding an oxidizing agent to the leaching solution, and arsenic in the adjusting solution. Scorodite is manufactured by the crystallization process which converts into crystal | crystallization. |