| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sulfide precipitation method of a metal that can control the generation of a hydrogen sulfide gas. <P>SOLUTION: The sulfide precipitation method is a method that adds a sulfidizing agent and an alkaline aqueous solution to an acid treatment liquid including a target metal, and precipitates the target metal as a sulfide, wherein the alkaline aqueous solution is mixed with the sulfidizing agent, and the mixed liquid is added to the treatment liquid. Because the generation of the hydrogen sulfide gas is controlled in the condition that the target metal remains in the treatment liquid, the processing load of the hydrogen sulfide gas with toxicity can be reduced. An extra hydrogen sulfide gas is not generated, and the sulfidizing agent and the alkaline solution are used to generate the sulfide efficiently, thereby: reducing the consumption of the sulfidizing agent and the alkaline solution; and performing the reduction of cost. <P>COPYRIGHT: (C)2013,JPO&INPIT |
