RADIOISOTOPES
Online ISSN : 1884-4111
Print ISSN : 0033-8303
ISSN-L : 0033-8303
Articles
Behavior and Distribution of Rare Earth Elements, Thorium and Uranium in Soil Environment
Naoki KANOToshiyuki TSUCHIDANobuo SAKAMOTOHe LUYoshikazu NISHIMURADaichi OGURAHiroshi IMAIZUMILidi GAO
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JOURNALS OPEN ACCESS

2009 Volume 58 Issue 11 Pages 727-741

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Abstract

Consequently, the following matters have been mainly clarified. (1)REEs in soils mainly exists in the form of F(rd)fraction(i.e., silicate), although F(om) or F(fm) was relatively large proportion fraction(F(om):8-28%; F(fm):6-20%); while U in soils may be present as the fraction bound to carbonate (15%) in addition to as F(rd)(60-70%). (2)The total concentrations of U in soil in agricultural field is remarkably larger (about 2 times) than that in non-agricultural field, although the concentrations of REEs and Th are not greatly varied regardless of soil utilizations(i.e., paddy field, upland field or no plow). (3)The value of pH(H2O)-pH(KCl) in soil of the upland field is smallest. Moreover, EC(electric conductivity) in soil of the upland field is much higher than that of the paddy field or of the non-agricultural field. (4)REE pattern of the crops and fertilizers is generally similar to that of soils, although the order of the concentration of REEs is “soils” > “fertilizers” > “crops”.

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© 2009 by Japan Radioisotope Association
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