title: Estimation of soil-soil solution distribution coefficient of radiostrontium using soil properties.
abstract: We propose a new approach for estimation of soil-soil solution distribution coefficient (K(d)) of radiostrontium using some selected soil properties. We used 142 Japanese agricultural soil samples (35 Andosol, 25 Cambisol, 77 Fluvisol, and 5 others) for which Sr-K(d) values had been determined by a batch sorption test and listed in our database. Spearman's rank correlation test was carried out to investigate correlations between Sr-K(d) values and soil properties. Electrical conductivity and water soluble Ca had good correlations with Sr-K(d) values for all soil groups. Then, we found a high correlation between the ratio of exchangeable Ca to Ca concentration in water soluble fraction and Sr-K(d) values with correlation coefficient R=0.72. This pointed us toward a relatively easy way to estimate Sr-K(d) values.
authors.affiliation: Office of Biospheric Assessment for Waste Disposal, National Institute of Radiological Sciences, Anagawa 4-9-1, Inage, Chiba 263-8555, Japan. nao@nirs.go.jp
authors.forename: Nao K
authors.initials: NK
authors.lastname: Ishikawa
authors.forename: Shigeo
authors.initials: S
authors.lastname: Uchida
authors.forename: Keiko
authors.initials: K
authors.lastname: Tagami
mesh_terms: D002118:Calcium; D004553:Electric Conductivity; D007564:Japan; D012987:Soil / Q000032:analysis*; D012995:Solubility; D013326:Strontium Radioisotopes / Q000032:analysis*; D014867:Water
chemical_list: D012987:Soil; D013326:Strontium Radioisotopes; D014867:Water; D002118:Calcium