公开(公告)号：US09586191B2

公开(公告)日：2017-03-07

申请号：US14428437

申请日：2013-09-18

申请人： Xuan Zhao ,  Jiying Wei ,  Fuzhi Li

发明人： Xuan Zhao ,  Jiying Wei ,  Fuzhi Li

IPC分类号： B01J23/00 ,  B01J20/02 ,  B01J20/28 ,  B01J20/10 ,  B01J20/06 ,  B01J20/32 ,  C02F1/28 ,  C02F101/20 ,  C02F103/34

CPC分类号： B01J20/0229 ,  B01J20/06 ,  B01J20/103 ,  B01J20/28004 ,  B01J20/28007 ,  B01J20/28009 ,  B01J20/3204 ,  B01J20/3236 ,  B01J20/3289 ,  B01J20/3293 ,  C02F1/281 ,  C02F1/288 ,  C02F1/488 ,  C02F2101/006 ,  C02F2101/20 ,  C02F2103/34

摘要： The invention discloses a micron-grade magnetic core coated ferrocyanide adsorbent for removing Cs ions in radioactive wastewater and a preparation method thereof. The adsorbent takes magnetic Fe3O4 as a core, the surface is coated with a dense SiO2 single layer serving as a protective layer, and an active component is metal ion stabilized potassium ferrocyanide coated on the outer layer, wherein stabilized metal ions comprise Ti, Zn, Cu, Ni, Co, and Zr. The particle size of the adsorbent is 0.2-5 μm, the adsorbent in the outermost layer is conductive to improving the adsorption efficiency for Cs+ ions, and an external magnetic field is adopted for realizing solid-liquid phase separation. The preparation method comprises the following steps: coating a hydrated metal oxide of Ti, Zr or Co, Ni, Cu or Zn on the surface of Fe3O4SiO2 to form a composite magnetic material, wherein the hydrated oxide performs hydroxyl polymerization reaction with the surface of SiO2 to produce M—O—Si bonds to improve the bonding strength between M and the surface of SiO2; and finally reacting the composite magnetic material with a potassium ferrocyanide solution to form the required composite adsorbent, wherein the metal ions M achieve the effects of stabilizing the ferrocyanide and also achieve a bridge effect for bonding the ferrocyanide and the composite magnetic material together.

摘要翻译： 本发明公开了一种用于去除放射性废水中的Cs离子的微米级磁芯涂层亚铁氰化物吸附剂及其制备方法。 吸附剂采用磁性Fe3O4为核心，表面涂覆有作为保护层的致密SiO 2单层，活性组分是金属离子稳定化的亚铁氰化钾，其外部层包含稳定的金属离子，其中Ti，Zn， Cu，Ni，Co和Zr。 吸附剂的粒径为0.2-5μm，最外层的吸附剂导电，提高Cs +离子的吸附效率，采用外部磁场实现固相分离。 制备方法包括以下步骤：在Fe3O4SiO2表面涂覆Ti，Zr或Co，Ni，Cu或Zn的水合金属氧化物，形成复合磁性材料，其中水合氧化物与SiO2表面进行羟基聚合反应 以产生M-O-Si键，以提高M与SiO2表面的结合强度; 最后使复合磁性材料与亚铁氰化钾溶液反应形成所需的复合吸附剂，其中金属离子M达到稳定亚铁氰化物的效果，并且还实现了将亚铁氰化物和复合磁性材料粘合在一起的桥接效应。