連続抽出法を用いた農耕土壌中における希土類元素，トリウム，ウラン等金属元素の分別定量
作者： Lidi GAO , Naoki KANO , Yoshimasa HIGASHIDAIRA , Yoshikazu NISHIMURA , Ryo ITO
DOI: 10.3769/RADIOISOTOPES.60.443
关键词:
摘要: In order to investigate the behavior and distribution of metallic elements including rare earth elements(REEs), thorium(Th) uranium(U) in agricultural field, these soils were partitioned into 6 fractions by a sequential extraction procedure:water soluble(F1), exchangeable(F2), bound inorganic matter(F3), organic matter(F4), free oxides(F5) residual(F6) fractions, determined for each fraction as well total amount. Soil samples collected from field (paddy upland field) non-agricultural Sakata City (from 2005 2010) Murayama 2008 Yamagata Prefecture, Sekikawa Village, Iwafune District(from 2007 Niigata Prefecture.Consequently, following matters have been mainly clarified. (1) The proportion among six are varied depending on soil utilization(i.e., paddy, or no plow). Among REEs, tendency that F5 heavy-REE(HREE) is generally larger than light-REE(LREE) middle-REE(MREE) can be found. (2) differences REEs concentrations(or REE pattern) observed sampling points. It related nature content Fe-Mn oxides carbon(i.e., affinity matter). (3) concentrations not greatly regardless period(i.e., spring autumn).
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