title: Advanced remediation of uranium-contaminated soil.
abstract: The existing decontamination method using electrokinetic equipment after acidic washing for uranium-contaminated soil requires a long decontamination time and a significant amount of electric power. However, after soil washing, with a sulfuric acid solution and an oxidant at 65 °C, the removal of the muddy solution using a 100 mesh sieve can decrease the radioactivity of the remaining coarse soil to the clearance level. Therefore, only a small amount of fine soil collected from the muddy solution requires the electrokinetic process for its decontamination. Furthermore, it is found that the selective removal of uranium from the sulfuric washing solution is not obtained using an anion exchanger but rather using a cation exchanger, unexpectedly. More than 90% of the uranium in the soil washing solutions is adsorbed on the S-950 resin, and 87% of the uranium adsorbed on S-950 is desorbed by washing with a 0.5 M Na2CO3solution at 60 °C.
authors: Decontamination and Decommissioning Research Div., Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yusong-gu, Daejeon, 305-353, Republic of Korea. Electronic address: nsskim@kaeri.re.kr.
authors: S S
authors: SS
authors: Kim
authors: Decontamination and Decommissioning Research Div., Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yusong-gu, Daejeon, 305-353, Republic of Korea.
authors: G S
authors: GS
authors: Han
authors: Decontamination and Decommissioning Research Div., Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yusong-gu, Daejeon, 305-353, Republic of Korea.
authors: G N
authors: GN
authors: Kim
authors: Decontamination and Decommissioning Research Div., Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yusong-gu, Daejeon, 305-353, Republic of Korea.
authors: D S
authors: DS
authors: Koo
authors: Decontamination and Decommissioning Research Div., Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yusong-gu, Daejeon, 305-353, Republic of Korea.
authors: I G
authors: IG
authors: Kim
authors: Decontamination and Decommissioning Research Div., Korea Atomic Energy Research Institute, 1045 Daedeok-daero, Yusong-gu, Daejeon, 305-353, Republic of Korea.
authors: J W
authors: JW
authors: Choi
mesh_terms: D003666:Decontamination; D052918:Environmental Restoration and Remediation / Q000379:methods*; D012987:Soil; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D014501:Uranium / Q000032:analysis*
chemical_list: D012987:Soil; D012990:Soil Pollutants, Radioactive; D014501:Uranium
keywords: Decontamination; Resin; Soil; Uranium; Washing