Mishra S, Arae H, Zamostyan P V, Ishikawa T, Yonehara H, Sahoo S K
National Institute of Radiological Sciences, 4-9-1 Anagawa, Inage-ku, Chiba, Japan.
Radiat Prot Dosimetry. 2012 Nov;152(1-3):238-42. doi: 10.1093/rpd/ncs230. Epub 2012 Aug 28.
Sorption-desorption behaviour of uranium (U), cesium (Cs) and strontium (Sr) was examined by quantification of the solid-liquid distribution coefficients (K(d)) using batch method in typical podzol soils from Ukraine. The effect of different physico-chemical parameters of soil on K(d) values has been discussed. Sorption reversibility has been tested by single extraction test. U shows reversible sorption and there was no isotopic fractionation observed with a known isotopic U composition using as tracer. Cs sorption mostly occurred in an irreversible manner. The clay content and exchangeable potassium in soil play an important role in Cs fixation. Sr adsorption is observed to be reversible and mainly controlled by cation exchange and shows highest mobility in the soil-water system. The K(d) values are found in the decreasing order U (log K(d) ≈ 2-3) > Cs (log K(d) ≈ 2) > Sr (log K(d) ≈ 1).
通过使用批量法对乌克兰典型灰化土中固液分配系数（K(d)）进行定量分析，研究了铀（U）、铯（Cs）和锶（Sr）的吸附-解吸行为。讨论了土壤不同物理化学参数对K(d)值的影响。通过单次萃取试验测试了吸附可逆性。U表现出可逆吸附，并且在使用已知同位素U组成作为示踪剂时未观察到同位素分馏。Cs的吸附大多以不可逆方式发生。土壤中的粘土含量和可交换钾在Cs固定中起重要作用。观察到Sr的吸附是可逆的，主要受阳离子交换控制，并且在土壤-水系统中表现出最高的迁移率。发现K(d)值按U（log K(d)≈2 - 3）> Cs（log K(d)≈2）> Sr（log K(d)≈1）的顺序递减。
