	US 12,214,363 B2
	Method for separating fine particles in soil using cationic magnetic nanoparticles
Il Gook Kim, Daejeon (KR); Chan Woo Park, Uiwang-si (KR); Hee Man Yang, Daejeon (KR); Kune Woo Lee, Daejeon (KR); In Ho Yoon, Daejeon (KR); and Bum Kyoung Seo, Daejeon (KR)
Assigned to KOREA ATOMIC ENERGY RESEARCH INSTITUTE, Daejeon (KR)
Appl. No. 17/277,630
Filed by KOREA ATOMIC ENERGY RESEARCH INSTITUTE, Daejeon (KR)
PCT Filed Sep. 18, 2019, PCT No. PCT/KR2019/012032 § 371(c)(1), (2) Date Mar. 18, 2021, PCT Pub. No. WO2020/060171, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 10-2018-0111833 (KR), filed on Sep. 18, 2018; and application No. 10-2019-0109545 (KR), filed on Sep. 4, 2019.
Prior Publication US 2021/0346894 A1, Nov. 11, 2021
Int. Cl. B03C 1/30 (2006.01); B03C 1/033 (2006.01); B03C 1/28 (2006.01); B03C 7/02 (2006.01); B09C 1/00 (2006.01); C08K 3/22 (2006.01); C08K 9/10 (2006.01); C08L 79/02 (2006.01); G21F 9/00 (2006.01); H01F 1/34 (2006.01); B82Y 25/00 (2011.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)

CPC B03C 1/30 (2013.01) [B03C 1/0332 (2013.01); B03C 1/288 (2013.01); B03C 7/02 (2013.01); B09C 1/00 (2013.01); C08K 3/22 (2013.01); C08K 9/10 (2013.01); C08L 79/02 (2013.01); G21F 9/00 (2013.01); H01F 1/342 (2013.01); B03C 2201/20 (2013.01); B82Y 25/00 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C08K 2201/011 (2013.01)]

9 Claims

1. A method of separating fine particles in soil, comprising:

preparing a cationic magnetic nanoparticle composite by mixing magnetic nanoparticles and a cationic material (Step a);

mixing the composite with a contaminated soil so that the composite is bonded with fine particles containing clay or silt by electrostatic attraction (Step b); and

performing magnetic separation or sequentially performing sieving and magnetic separation (Step c).