Method for treating heavy-metal-containing wastewater using sulfidizing agent
    3.
    发明授权
    Method for treating heavy-metal-containing wastewater using sulfidizing agent 失效
    使用硫化剂处理含重金属的废水的方法

    公开(公告)号:US07264733B2

    公开(公告)日:2007-09-04

    申请号:US10488390

    申请日:2002-08-29

    IPC分类号: C02F1/62 C02F101/20

    摘要: A method and apparatus for treating heavy-metal-containing wastewater using a sulfidizing agent. Sulfidizing treatment is carried out by adding a sulfidizing agent to heavy-metal-containing wastewater, while detecting hydrogen sulfide gas generated from the wastewater, such as to maintain a state in which hydrogen sulfide gas is just starting to be generated from the wastewater. When separately recovering each of a plurality of metals from wastewater in which are mixed ions of the plurality of metals, there is repeated for each of the metals a process in which the acidity of the wastewater is adjusted to within a range suitable for the metal to be separated out and recovered, a sulfidizing reaction is carried out on that metal, and the metal sulfide produced is precipitated and filtered off.

    摘要翻译: 一种使用硫化剂处理含重金属的废水的方法和装置。 硫化处理是通过在含重金属的废水中加入硫化剂,同时检测由废水产生的硫化氢气体,从而保持从废水开始生成硫化氢气体的状态。 当从其中是多种金属的混合离子的废水中分别回收多种金属中的每一种时,对于每种金属,重复将废水的酸度调节到适合于金属的范围内的方法 分离出并回收,对该金属进行硫化反应,使所生成的金属硫化物析出并过滤。