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9 条记录 (耗时 0.019 秒)

    Fixation and stabilization of metals in contaminated soils and materials
    6.
    发明授权
    Fixation and stabilization of metals in contaminated soils and materials 失效
    污染土壤和材料中金属的固定和稳定

    公开(公告)号：US06258018B1

    公开(公告)日：2001-07-10

    申请号：US09340898

    申请日：1999-06-28

    申请人： Dhiraj Pal ,  Karl W. Yost ,  Steven A. Chisick

    发明人： Dhiraj Pal ,  Karl W. Yost ,  Steven A. Chisick

    IPC分类号： A62D300

    CPC分类号： G21F9/304 ,  B09B3/0041 ,  B09C1/08 ,  C02F11/008 ,  C02F2101/006 ,  C02F2101/20 ,  C04B18/0472 ,  C04B28/04 ,  C04B28/10 ,  C04B28/14 ,  C04B28/34 ,  C04B2111/00767 ,  E02D3/00 ,  G21F9/302 ,  Y02W30/58 ,  Y02W30/91 ,  C04B22/165 ,  C04B22/143

    摘要： The present invention discloses a method of treating heavy metal bearing process materials and heavy metal toxic hazardous wastes. The invention relates to treatment methods employed to chemically convert leachable heavy metals in heavy metal bearing solid and/or liquid waste materials to a non-leachable form by contacting or mixing the material with a chemical suspension which includes a first component which supplies sulphates, halides, halites, silicates or calcium oxide and a second component which supplies a phosphate anion. The solid and liquid waste materials include contaminated sludges, slurries, soils, wastewaters, spent carbon, sand, wire chips, plastic fluff, cracked battery casings, bird and buck shots and construction debris. The present invention discloses a process comprising a single step contacting of a hazardous waste with a two or three component chemical suspension. The present invention provides a new way of treating a universe of heavy metal contaminated materials at any pH.

    摘要翻译： 本发明公开了一种处理重金属负载工艺材料和重金属有毒有害废物的方法。 本发明涉及用于将含重金属的固体和/或液体废物中的可浸出重金属化学转化成不可浸出形式的处理方法，其通过使材料与化学悬浮液接触或混合，所述化学悬浮液包括提供硫酸盐，卤化物的第一组分 卤石，硅酸盐或氧化钙，以及提供磷酸盐阴离子的第二组分。 固体和液体废物包括污染的污泥，泥浆，土壤，废水，废碳，沙子，线芯片，塑料绒毛，破裂的电池外壳，鸟和屁股和建筑垃圾。 本发明公开了一种方法，其包括危险废物与两种或三种组分化学悬浮液的单步接触。 本发明提供了在任何pH下处理重金属污染物质的全新方法。

    Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials
    7.
    发明授权
    Reduction of leachability and solubility of radionuclides and radioactive substances in contaminated soils and materials 失效
    降低放射性核素和放射性物质在污染土壤和材料中的浸出性和溶解度

    公开(公告)号：US5732367A

    公开(公告)日：1998-03-24

    申请号：US663692

    申请日：1996-06-14

    申请人： Karl W. Yost ,  Steven A. Chisick

    发明人： Karl W. Yost ,  Steven A. Chisick

    IPC分类号： A62D3/00 ,  A62D3/33 ,  A62D101/24 ,  A62D101/43 ,  B09B3/00 ,  B09C1/08 ,  C02F11/00 ,  C04B28/34 ,  G21F9/30 ,  G21F9/00

    CPC分类号： G21F9/304 ,  A62D3/33 ,  B09B3/0041 ,  B09C1/08 ,  C02F11/008 ,  C04B18/0472 ,  C04B28/04 ,  C04B28/10 ,  C04B28/14 ,  C04B28/34 ,  G21F9/302 ,  A62D2101/24 ,  A62D2101/43 ,  C02F2101/006 ,  C02F2101/20 ,  C04B2111/00767 ,  Y02W30/58 ,  Y02W30/91

    摘要： A process for chemical fixation of radionuclides and radioactive compounds present in soils and solid materials. Radionuclides and other radioactive compounds are converted to low-temperature Apatite-Group structural isomorphs (general composition: (AB).sub.5 (XO.sub.4).sub.3 Z), usually phosphatic, that are insoluble, non-leachable, non-zeolitic, and pH stable by contacting with a sulfate, hydroxide, chloride, fluoride and/or silicate source and with a phosphate anion in either a one or two step process. In the preferred embodiment, soils or contaminated materials containing radionuclides and radioactive wastes are contacted with technical grade phosphoric acid (TGPA) which contains sulfates as an impurity. The Apatitic-structure end product is chemically altered from the initial material and reduced in volume and mass. The end product can be void of free liquids and exhibits sufficiently high levels of thermal stability to be effective in the presence of heat generating nuclear reactions. The process occurs at ambient temperature and pressure.

    摘要翻译： 化学固定放射性核素和放射性化合物存在于土壤和固体材料中的过程。 放射性核素和其他放射性化合物转化成低温磷灰石组结构同晶（通常组成：（AB）5（XO4）3Z），通常是磷酸盐，它们是不溶性，不可浸出，非沸石和pH稳定的 在一步或两步过程中与硫酸盐，氢氧化物，氯化物，氟化物和/或硅酸盐源和磷酸盐阴离子接触。 在优选实施例中，含有放射性核素和放射性废物的污物或污染物质与含有硫酸盐的杂质的工业级磷酸（TGPA）接触。 磷灰石结构最终产品从初始材料化学改变，体积和质量减小。 最终产品可以没有游离液体，并且表现出足够高的热稳定性水平，以便在发生热反应的情况下有效。 该过程发生在环境温度和压力下。