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    REMOVAL OF METALS FROM WASTEWATER
    1.
    发明申请
    REMOVAL OF METALS FROM WASTEWATER 审中-公开
    从废水中去除金属

    公开(公告)号：US20160159669A1

    公开(公告)日：2016-06-09

    申请号：US14953655

    申请日：2015-11-30

    申请人： Elise Noelle BARBOT ,  Meredith Beck GUSTAFSSON ,  Cynthia Marie HAVRAN ,  Monica Alexandra ARBOLEDA-PEÑA

    发明人： Elise Noelle BARBOT ,  Meredith Beck GUSTAFSSON ,  Cynthia Marie HAVRAN ,  Monica Alexandra ARBOLEDA-PEÑA

    IPC分类号： C02F1/52 ,  C02F3/00 ,  C02F1/72

    CPC分类号： C02F1/5227 ,  C02F1/5245 ,  C02F1/56 ,  C02F1/66 ,  C02F1/72 ,  C02F3/02 ,  C02F2101/106 ,  C02F2101/20 ,  C02F2103/365 ,  Y02W10/15

    摘要： A method for effecting a comprehensive removal of heavy metals from wastewater in a two stage process in which the wastewater is contacted in a first stage with a source of ferric ions under mildly acidic conditions (pH 5 to pH 8), preferably followed by the removal of the precipitated solids using a solid-liquid separation; a second stage follows in which the wastewater from the first step is contacted with a source of ferric ions under alkaline conditions (pH 8+) followed by the removal of the precipitated solids using a second solid-liquid separation. Used in conjunction with an initial oxidation step, the present method makes possible the removal of a whole suite of heavy metals present in both the anionic and cationic form in refinery wastewater. The treatment also removes metal compounds in the particulate phase. Metals concentrations can be significantly decreased from the mid to high ppb (parts per billion) range down to the low ppb range to meet the quality criteria for discharge.

    摘要翻译： 一种在二级方法中从废水中综合去除重金属的方法，其中废水在温和酸性条件（pH5至pH8）下在第一阶段与铁离子源接触，优选随后除去 的沉淀固体使用固液分离; 接下来的第二阶段是在碱性条件（pH 8+）下将来自第一步骤的废水与铁离子源接触，然后使用第二固液分离除去沉淀的固体。 与初始氧化步骤结合使用，本方法可以在炼厂废水中去除阴离子和阳离子形式的整套重金属。 该处理还除去了颗粒相中的金属化合物。 金属浓度可以从中到高ppb（十亿分之一）范围下降到低ppb范围，以满足排放的质量标准。