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    Preparation and application of stabilized iron nanoparticles for dechlorination of chlorinated hydrocarbons in soils, sediments, and ground water
    3.
    发明授权
    Preparation and application of stabilized iron nanoparticles for dechlorination of chlorinated hydrocarbons in soils, sediments, and ground water 有权
    稳定的铁纳米颗粒在土壤，沉积物和地下水中氯化烃脱氯的制备和应用

    公开(公告)号：US07887880B2

    公开(公告)日：2011-02-15

    申请号：US11571390

    申请日：2005-06-30

    申请人： Dongye Zhao ,  Feng He

    发明人： Dongye Zhao ,  Feng He

    IPC分类号： B05D7/00 ,  A62D3/34

    CPC分类号： C02F1/705 ,  B09C1/002 ,  B09C1/08 ,  C02F2101/36 ,  C02F2103/06 ,  Y10T428/12028

    摘要： A stabilized, chemically reactive, metallic nano-material effective for degradation of chlorinated organic compounds in soils, sediments and groundwater. The nano-material is composed of a magnetic metal nanoparticle and a carbohydrate stabilizer bound to the nanoparticle. The preferred metal nanoparticle is iron and the preferred carbohydrate stabilizer is either a starch or a water soluble cellulose such as sodium carboxymethyl cellulose. The nanoparticle may be either mono-metallic, bi-metallic or multi-metallic in nature, but is preferably bi-metallic wherein it is coated with a secondary catalytic metal coating, preferably palladium. A method of making the metallic nano-material is further disclosed wherein a solution of the metal nanoparticle and carbohydrate stabilizer is prepared, and the nanoparticle is then reduced under inert conditions. A process for reductive dechlorination of chlorinated organic compounds is also disclosed wherein the reduced magnetic metal nanoparticle is prepared, and then contacted with a chlorinated organic compound to dechlorinate the compound. Preferably, the nano-material is injected into a site such as soil subsurface or groundwater contaminated with a chlorinated organic compound to provide in-situ dechlorination.

    摘要翻译： 稳定的化学反应性金属纳米材料有效降解土壤，沉积物和地下水中的氯化有机化合物。 纳米材料由磁性金属纳米颗粒和与纳米颗粒结合的碳水化合物稳定剂组成。 优选的金属纳米颗粒是铁，优选的碳水化合物稳定剂是淀粉或水溶性纤维素如羧甲基纤维素钠。 纳米颗粒本质上可以是单金属的，双金属的或多金属的，但优选是双金属的，其中涂覆有次级催化金属涂层，优选钯。 进一步公开了制备金属纳米材料的方法，其中制备金属纳米颗粒和碳水化合物稳定剂的溶液，然后在惰性条件下还原纳米颗粒。 还公开了氯化有机化合物的还原脱氯方法，其中制备还原的磁性金属纳米颗粒，然后与氯化有机化合物接触以使化合物脱氯。 优选地，将纳米材料注入诸如被氯化有机化合物污染的地下水或地下水等地点，以提供原位脱氯。

    Preparation and Applications of Stabilized Metal Nanoparticles for Dechlorination of Chlorinated Hydrocarbons in Soils, Sediments, and Ground Water
    4.
    发明申请
    Preparation and Applications of Stabilized Metal Nanoparticles for Dechlorination of Chlorinated Hydrocarbons in Soils, Sediments, and Ground Water 有权
    稳定金属纳米粒子在土壤，沉积物和地下水中氯化烃脱氯的制备与应用

    公开(公告)号：US20080190865A1

    公开(公告)日：2008-08-14

    申请号：US11571390

    申请日：2005-06-30

    申请人： Dongye Zhao ,  Feng He

    发明人： Dongye Zhao ,  Feng He

    IPC分类号： C02F1/70 ,  A62D3/34 ,  C22C38/00 ,  C22C19/03 ,  C22C19/07 ,  C22C18/00 ,  C22C22/00 ,  C22C5/04

    CPC分类号： C02F1/705 ,  B09C1/002 ,  B09C1/08 ,  C02F2101/36 ,  C02F2103/06 ,  Y10T428/12028

    摘要： A stabilized, chemically reactive, metallic nano-material effective for degradation of chlorinated organic compounds in soils, sediments and groundwater. The nano-material is composed of a magnetic metal nanoparticle and a carbohydrate stabilizer bound to the nanoparticle. The preferred metal nanoparticle is iron and the preferred carbohydrate stabilizer is either a starch or a water soluble cellulose such as sodium carboxymethyl cellulose. The nanoparticle may be either mono-metallic, bi-metallic or multi-metallic in nature, but is preferably bi-metallic wherein it is coated with a secondary catalytic metal coating, preferably palladium. A method of making the metallic nano-material is further disclosed wherein a solution of the metal nanoparticle and carbohydrate stabilizer is prepared, and the nanoparticle is then reduced under inert conditions. A process for reductive dechlorination of chlorinated organic compounds is also disclosed wherein the reduced magnetic metal nanoparticle is prepared, and then contacted with a chlorinated organic compound to dechlorinate the compound. Preferably, the nano-material is injected into a site such as soil subsurface or groundwater contaminated with a chlorinated organic compound to provide in-situ dechlorination.

    摘要翻译： 稳定的化学反应性金属纳米材料有效降解土壤，沉积物和地下水中的氯化有机化合物。 纳米材料由磁性金属纳米颗粒和与纳米颗粒结合的碳水化合物稳定剂组成。 优选的金属纳米颗粒是铁，优选的碳水化合物稳定剂是淀粉或水溶性纤维素如羧甲基纤维素钠。 纳米颗粒本质上可以是单金属的，双金属的或多金属的，但优选是双金属的，其中涂覆有次级催化金属涂层，优选钯。 进一步公开了制备金属纳米材料的方法，其中制备金属纳米颗粒和碳水化合物稳定剂的溶液，然后在惰性条件下还原纳米颗粒。 还公开了氯化有机化合物的还原脱氯方法，其中制备还原的磁性金属纳米颗粒，然后与氯化有机化合物接触以使化合物脱氯。 优选地，将纳米材料注入诸如被氯化有机化合物污染的地下水或地下水等地点，以提供原位脱氯。

    Selective removal of toxic compounds like arsenic from drinking water using a polymeric ligand exchanger
    5.
    发明申请
    Selective removal of toxic compounds like arsenic from drinking water using a polymeric ligand exchanger 审中-公开
    使用聚合配体交换器从饮用水中选择性去除有毒化合物，如砷

    公开(公告)号：US20070056911A1

    公开(公告)日：2007-03-15

    申请号：US11445757

    申请日：2006-06-02

    申请人： Dongye Zhao ,  Byungryul An

    发明人： Dongye Zhao ,  Byungryul An

    IPC分类号： C02F1/28

    CPC分类号： C02F1/683 ,  B01J20/26 ,  B01J20/261 ,  B01J20/265 ,  B01J20/28019 ,  B01J20/3265 ,  C02F1/285 ,  C02F2101/103 ,  C02F2101/12 ,  C02F2101/18 ,  C02F2303/16

    摘要： A method of removing toxic compounds from water comprises the steps of providing a polymeric ligand exchanger having a chelating resin containing nitrogen electron donor atoms and a transition metal ion bonded with the nitrogen donor atoms on the surface of the chelating resin, and contacting water containing a toxic compound with the polymeric ligand exchanger to remove the toxic compound from the water. The preferred metal ion is a cupric ion, and the preferred toxic compound to be removed from water is arsenic. The method further includes the step of regenerating the polymeric ligand exchanger with brine and the step of treating the brine used to regenerate the polymeric ligand exchanger with iron chloride to remove arsenate therefrom so that the brine may be re-used in the system to reduce the overall volume of waste material.

    摘要翻译： 从水中除去有毒化合物的方法包括以下步骤：提供具有螯合树脂的聚合配体交换剂，其含有氮电子给体原子和与螯合树脂表面上的氮供体原子结合的过渡金属离子，并使含有 与聚合物配体交换剂的有毒化合物从水中除去有毒化合物。 优选的金属离子是铜离子，从水中除去的优选的有毒化合物是砷。 该方法还包括用盐水再生聚合物配体交换剂的步骤，以及用氯化铁处理用于再生聚合物配体交换剂的盐水以从其中除去砷酸盐的步骤，以便可以在系统中重新使用卤水以减少 废料总体积。

    Selective removal of phosphates and chromates from contaminated water by ion exchange
    6.
    发明授权
    Selective removal of phosphates and chromates from contaminated water by ion exchange 有权
    通过离子交换从污染水中选择性去除磷酸盐和铬酸盐

    公开(公告)号：US6136199A

    公开(公告)日：2000-10-24

    申请号：US206446

    申请日：1998-12-07

    申请人： Arup SenGupta ,  Dongye Zhao

    发明人： Arup SenGupta ,  Dongye Zhao

    IPC分类号： B01J41/04 ,  B01J45/00 ,  C02F1/42

    CPC分类号： B01J41/04 ,  B01J45/00 ,  C02F1/42 ,  Y10S210/906 ,  Y10S210/913

    摘要： Phosphates and chromates are selectively removed from contaminated water by a new class of sorbent, referred to as a Polymeric Ligand Exchanger (PLE). The exchanger bed comprising a styrene-divinylbenzene or polymethacrylate matrix having an electrically neutral chelating functional group with nitrogen or oxygen donor atoms, and a Lewis-acid type metal cation, such as copper, bonded to the chelating functional group in a manner that the positive charges of the metal cation are not neutralized. PLEs are very selective toward phosphates and chromates, chemically stable, and also amenable to efficient regeneration.

    摘要翻译： 磷酸盐和铬酸盐通过称为聚合配体交换剂（PLE）的新类型的吸附剂从污染的水中选择性地去除。 交换床包含具有带有氮或氧供体原子的电中性螯合官能团的苯乙烯 - 二乙烯基苯或聚甲基丙烯酸甲酯基质，以及螯合官能团的路易斯酸型金属阳离子如铜， 不中和金属阳离子的电荷。 PLE对磷酸盐和铬酸盐非常有选择性，化学稳定，并且还适于有效的再生。

    In situ remediation of inorganic contaminants using stabilized zero-valent iron nanoparticles
    7.
    发明授权
    In situ remediation of inorganic contaminants using stabilized zero-valent iron nanoparticles 失效
    使用稳定的零价铁纳米粒子对无机污染物进行原位修复

    公开(公告)号：US07635236B2

    公开(公告)日：2009-12-22

    申请号：US11694314

    申请日：2007-03-30

    申请人： Dongye Zhao ,  Yinhui Xu

    发明人： Dongye Zhao ,  Yinhui Xu

    IPC分类号： B09B1/00

    CPC分类号： C02F1/705 ,  B09C1/002 ,  B09C1/08 ,  B82Y30/00 ,  C02F2101/103 ,  C02F2101/163 ,  C02F2101/22 ,  C02F2305/08 ,  Y10S977/903

    摘要： A method for preparing highly stabilized and dispersible zero valent iron nanoparticles and using the nanoparticles as a remediation technology against inorganic chemical toxins in contaminated sites. The method employs a composition containing select polysaccharides (starch or cellulose) as a stabilizer for the iron nanoparticles in a liquid carrier, and results in suspensions of iron nanoparticles of desired size and mobility in water, brine, soils or sediments. The stabilizer facilitates controlling the dispersibility of the iron nanoparticles in the liquid carrier. An effective amount of the composition is delivered to a contaminated site so that the zero valent iron nanoparticles can remediate one or more toxins such as an arsenate, a nitrate, a chromate, or a perchlorate in the contaminated site.

    摘要翻译： 一种制备高度稳定和分散的零价铁纳米颗粒的方法，并使用纳米颗粒作为抗污染场所的无机化学毒素的修复技术。 该方法使用含有选择性多糖（淀粉或纤维素）作为液体载体中的铁纳米颗粒的稳定剂的组合物，并且导致在水，盐水，土壤或沉积物中具有所需尺寸和迁移率的铁纳米颗粒的悬浮液。 稳定剂有助于控制铁纳米颗粒在液体载体中的分散性。 将有效量的组合物输送到污染部位，使得零价铁纳米颗粒可以修复污染部位中的一种或多种毒素如砷酸盐，硝酸盐，铬酸盐或高氯酸盐。

    In Situ Remediation of Inorganic Contaminants Using Stabilized Zero-Valent Iron Nanoparticles
    8.
    发明申请
    In Situ Remediation of Inorganic Contaminants Using Stabilized Zero-Valent Iron Nanoparticles 失效
    使用稳定的零价铁纳米颗粒对无机污染物进行原位修复

    公开(公告)号：US20070256985A1

    公开(公告)日：2007-11-08

    申请号：US11694314

    申请日：2007-03-30

    申请人： Dongye Zhao ,  Yinhui Xu

    发明人： Dongye Zhao ,  Yinhui Xu

    IPC分类号： C02F1/70 ,  A62D3/30

    CPC分类号： C02F1/705 ,  B09C1/002 ,  B09C1/08 ,  B82Y30/00 ,  C02F2101/103 ,  C02F2101/163 ,  C02F2101/22 ,  C02F2305/08 ,  Y10S977/903

    摘要： A method for preparing highly stabilized and dispersible zero valent iron nanoparticles and using the nanoparticles as a remediation technology against inorganic chemical toxins in contaminated sites. The method employs a composition containing select polysaccharides (starch or cellulose) as a stabilizer for the iron nanoparticles in a liquid carrier, and results in suspensions of iron nanoparticles of desired size and mobility in water, brine, soils or sediments. The stabilizer facilitates controlling the dispersibility of the iron nanoparticles in the liquid carrier. An effective amount of the composition is delivered to a contaminated site so that the zero valent iron nanoparticles can remediate one or more toxins such as an arsenate, a nitrate, a chromate, or a perchlorate in the contaminated site.

    摘要翻译： 一种制备高度稳定和分散的零价铁纳米颗粒的方法，并使用纳米颗粒作为抗污染场所的无机化学毒素的修复技术。 该方法使用含有选择性多糖（淀粉或纤维素）作为液体载体中的铁纳米颗粒的稳定剂的组合物，并且导致在水，盐水，土壤或沉积物中具有所需尺寸和迁移率的铁纳米颗粒的悬浮液。 稳定剂有助于控制铁纳米颗粒在液体载体中的分散性。 将有效量的组合物输送到污染部位，使得零价铁纳米颗粒可以修复污染部位中的一种或多种毒素如砷酸盐，硝酸盐，铬酸盐或高氯酸盐。