METHOD FOR LEACHING ARSENIC

摘要

PROBLEM TO BE SOLVED: To leach pentavalent arsenic suitable for the production of crystalline scorodite from a sulfide precipitate at a high leaching rate without adding pH modifier.SOLUTION: This invention relates to a method of leaching arsenic in which a sulfide precipitate comprising arsenic is added with copper and oxidizing agent, and sulfate or copper sulfate to turn arsenic into arsenious acid, and the arsenious acid is oxidized and leached as arsenic acid.