title: Predicting radiocaesium sorption characteristics with soil chemical properties for Japanese soils.
abstract: The high variability of the soil-to-plant transfer factor of radiocaesium (RCs) compels a detailed analysis of the radiocaesium interception potential (RIP) of soil, which is one of the specific factors ruling the RCs transfer. The range of the RIP values for agricultural soils in the Fukushima accident affected area has not yet been fully surveyed. Here, the RIP and other major soil chemical properties were characterised for 51 representative topsoils collected in the vicinity of the Fukushima contaminated area. The RIP ranged a factor of 50 among the soils and RIP values were lower for Andosols compared to other soils, suggesting a role of soil mineralogy. Correlation analysis revealed that the RIP was most strongly and negatively correlated to soil organic matter content and oxalate extractable aluminium. The RIP correlated weakly but positively to soil clay content. The slope of the correlation between RIP and clay content showed that the RIP per unit clay was only 4.8 mmol g(-1) clay, about threefold lower than that for clays of European soils, suggesting more amorphous minerals and less micaceous minerals in the clay fraction of Japanese soils. The negative correlation between RIP and soil organic matter may indicate that organic matter can mask highly selective sorption sites to RCs. Multiple regression analysis with soil organic matter and cation exchange capacity explained the soil RIP (R(2)=0.64), allowing us to map soil RIP based on existing soil map information.
authors.affiliation: Biosphere Impact Studies, SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400 Mol, Belgium; Division of Soil and Water Management, Katholieke Universiteit Leuven, Kasteelpark Arenberg 20, B-3001 Leuven, Belgium. Electronic address: suematsu@sckcen.be.
authors.forename: Shinichiro
authors.initials: S
authors.lastname: Uematsu
authors.affiliation: Division of Soil and Water Management, Katholieke Universiteit Leuven, Kasteelpark Arenberg 20, B-3001 Leuven, Belgium. Electronic address: erik.smolders@ees.kuleuven.be.
authors.forename: Erik
authors.initials: E
authors.lastname: Smolders
authors.affiliation: Biosphere Impact Studies, SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400 Mol, Belgium. Electronic address: lsweeck@sckcen.be.
authors.forename: Lieve
authors.initials: L
authors.lastname: Sweeck
authors.affiliation: Biosphere Impact Studies, SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400 Mol, Belgium. Electronic address: jwannijg@sckcen.be.
authors.forename: Jean
authors.initials: J
authors.lastname: Wannijn
authors.affiliation: Biosphere Impact Studies, SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400 Mol, Belgium. Electronic address: mvhees@sckcen.be.
authors.forename: May
authors.initials: M
authors.lastname: Van Hees
authors.affiliation: Biosphere Impact Studies, SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400 Mol, Belgium. Electronic address: hvandenh@sckcen.be.
authors.forename: Hildegarde
authors.initials: H
authors.lastname: Vandenhove
mesh_terms: D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry; D002588:Cesium Radioisotopes / Q000032:analysis* / Q000737:chemistry; D000077215:Clay; D007564:Japan; D008903:Minerals / Q000737:chemistry; D012987:Soil / Q000737:chemistry*; D012990:Soil Pollutants, Radioactive / Q000032:analysis* / Q000737:chemistry
chemical_list: D000538:Aluminum Silicates; D002588:Cesium Radioisotopes; D008903:Minerals; D012987:Soil; D012990:Soil Pollutants, Radioactive; D000077215:Clay
keywords: (137)Cs sorption in soil; Andosols; Fukushima contaminated area; Radiocaesium interception potential (RIP); Soil clay content; Soil organic matter