公开(公告)号：US12214363B2

公开(公告)日：2025-02-04

申请号：US17277630

申请日：2019-09-18

Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE

Inventor： Il Gook Kim ,  Chan Woo Park ,  Hee Man Yang ,  Kune Woo Lee ,  In Ho Yoon ,  Bum Kyoung Seo

IPC: B03C1/30 ,  B03C1/033 ,  B03C1/28 ,  B03C7/02 ,  B09C1/00 ,  C08K3/22 ,  C08K9/10 ,  C08L79/02 ,  G21F9/00 ,  H01F1/34 ,  B82Y25/00 ,  B82Y30/00 ,  B82Y40/00

Abstract: A method of separating fine particles (clay, silt, etc.) that have adsorbed contaminants such as heavy metals or radioactive nuclides in soil using cationic magnetic nanoparticles. According to the method, contaminants such as heavy metals or radioactive nuclides selectively or irreversibly adsorbed to fine particles (clay, silt, etc.) in soil may be economically and efficiently separated. Therefore, the method may be effectively used to restore soil in residential areas that are contaminated with radioactive nuclides in serious accidents such as the Fukushima Daiichi nuclear disaster as well as facility sites contaminated with heavy metals or radioactive nuclides.

公开(公告)号：US20190275573A1

公开(公告)日：2019-09-12

申请号：US16154724

申请日：2018-10-09

Applicant: Korea Atomic Energy Research Institute

Inventor： Il Gook Kim ,  Kune Woo Lee ,  Chan Woo Park ,  In Ho Yoon ,  Hee Man Yang ,  Bum Kyoung Seo

IPC: B09C1/08 ,  G21F9/30

Abstract: The present invention relates to a method for removing cesium in a clay mineral using hydrogen peroxide. According to the present invention, cesium in a clay mineral is removed using hydrogen peroxide, which serves to induce interlayer expansion of the clay mineral to allow a cation to easily enter an interlayer of the clay mineral, and thus cesium desorption efficiency can be further improved. Also, the method according to the present invention can be efficiently used to restore soil in residential areas widely contaminated with a radionuclide when a major accident such as Fukushima nuclear accident occurs as well as various sites of atomic energy facilities contaminated with a radionuclide. Also, since radiation-contaminated soil is treated with only hydrogen peroxide and cations, secondary environmental pollution caused by wastes can be significantly reduce and the waste disposing cost can also be saved.

公开(公告)号：US11673113B2

公开(公告)日：2023-06-13

申请号：US17012187

申请日：2020-09-04

Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE

Inventor： Hee Man Yang ,  Chan Woo Park ,  Kune Woo Lee ,  Il Gook Kim ,  In Ho Yoon

IPC: B01J20/06 ,  B01J20/02 ,  B01J20/24 ,  B01J20/28 ,  B01J20/30 ,  B01J20/32 ,  G21F9/12

CPC classification number: B01J20/0229 ,  B01J20/0259 ,  B01J20/06 ,  B01J20/24 ,  B01J20/28009 ,  B01J20/28021 ,  B01J20/3057 ,  B01J20/3204 ,  B01J20/3221 ,  B01J20/3236 ,  B01J20/3293 ,  G21F9/12

Abstract: The present invention relates to a radionuclide adsorbent, which includes a hollow space (specifically, an area which is entirely empty or in which transition metal oxide particles are present); and a transition metal-ferrocyanide shell (specifically, a transition metal-ferrocyanide shell having a structure in which a plurality of two-dimensional nano flakes overlap or a transition metal-ferrocyanide shell having a structure in which a plurality of three-dimensional nano polyhedrons agglomerate) formed on the space surface, a preparation method thereof, and a method of removing a radionuclide using the same.

公开(公告)号：US20210077980A1

公开(公告)日：2021-03-18

申请号：US17012187

申请日：2020-09-04

Applicant: KOREA ATOMIC ENERGY RESEARCH INSTITUTE

Inventor： Hee Man YANG ,  Chan Woo Park ,  Kune Woo Lee ,  Il Gook Kim ,  In Ho Yoon

IPC: B01J20/02 ,  B01J20/06 ,  B01J20/24 ,  B01J20/28 ,  B01J20/32 ,  B01J20/30 ,  G21F9/12

Abstract: The present invention relates to a radionuclide adsorbent, which includes a hollow space (specifically, an area which is entirely empty or in which transition metal oxide particles are present); and a transition metal-ferrocyanide shell (specifically, a transition metal-ferrocyanide shell having a structure in which a plurality of two-dimensional nano flakes overlap or a transition metal-ferrocyanide shell having a structure in which a plurality of three-dimensional nano polyhedrons agglomerate) formed on the space surface, a preparation method thereof, and a method of removing a radionuclide using the same.

公开(公告)号：US11059082B2

公开(公告)日：2021-07-13

申请号：US16154724

申请日：2018-10-09

Applicant: Korea Atomic Energy Research Institute

Inventor： Il Gook Kim ,  Kune Woo Lee ,  Chan Woo Park ,  In Ho Yoon ,  Hee Man Yang ,  Bum Kyoung Seo

IPC: B09C1/00 ,  B09C1/08 ,  G21F9/30 ,  C22B7/00 ,  C22B26/10 ,  C01D17/00 ,  G21F9/12

Abstract: The present invention relates to a method for removing cesium in a clay mineral using hydrogen peroxide. According to the present invention, cesium in a clay mineral is removed using hydrogen peroxide, which serves to induce interlayer expansion of the clay mineral to allow a cation to easily enter an interlayer of the clay mineral, and thus cesium desorption efficiency can be further improved. Also, the method according to the present invention can be efficiently used to restore soil in residential areas widely contaminated with a radionuclide when a major accident such as Fukushima nuclear accident occurs as well as various sites of atomic energy facilities contaminated with a radionuclide. Also, since radiation-contaminated soil is treated with only hydrogen peroxide and cations, secondary environmental pollution caused by wastes can be significantly reduce and the waste disposing cost can also be saved.