Radionuclide mobility and bioavailability in Norwegian and Soviet soils.
Radionuclide mobility and bioavailability in Norwegian and Soviet soils.
复制标题
挪威和苏联土壤中的放射性核素迁移率和生物利用度。
DOI：
10.1039/an9921700481
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
A. Norén
中科院分区：
文献类型：
--
作者：
D. Oughton;B. Salbu;G. Riise;H. Lien;G. Ostby;A. Norén
采用了一种连续提取程序来研究来自挪威、白俄罗斯和苏联切尔诺贝利地区土壤中的切尔诺贝利放射性核素（137Cs和90Sr）的形态。大多数137Cs（大于80%）与土壤组分密切相关，而90Sr的流动性更强，高达70%存在于易提取的组分中。90Sr: 137Cs比值随着距离反应堆的距离而减小，反映了热颗粒在靠近反应堆的区域沉积的比例较高，并且在切尔诺贝利地区收集的土壤中易于提取的90Sr分数明显较低。稳定Cs和稳定Sr在各部位的分布基本一致。因此，90Sr和137Cs在不同地点的分布差异，在较小程度上是由于沉降物的形成，而不是当地环境因素造成的。
A sequential extraction procedure has been applied to study the speciation of Chernobyl-derived radionuclides (137Cs and 90Sr) in soils from Norway, and from Byelorussia and the Chernobyl region in the USSR. Most 137Cs (greater than 80%) was strongly associated with soil components, whereas 90Sr was more mobile, up to 70% being found in the easily extractable fractions. The 90Sr: 137Cs ratio decreased with the distance from the reactor, reflecting the higher proportion of hot particles deposited in the regions close to the reactor, and the easily extractable fraction of 90Sr was significantly lower in the soils collected from the Chernobyl area. The distribution of stable Cs and stable Sr in the extraction fractions was similar for the various sites. Therefore, the location-specific differences in the distribution of 90Sr and, to a lesser extent, 137Cs arise because of fallout speciation rather than because of local environmental factors.