| 摘要 |
<p>The present invention provides a method to recover useful metal from a mine drainage or a waste sludge generated in processing mine drainage comprising: a step of raising the pH of the mine drainage (sludge solution) in order by a plurality of preset steps by inserting a pH controlling solution into the mine drainage discharged from a mine or a sludge solution whereby sludge is dissolved; and a step of recovering the metal deposited at each step.</p> |
