Vertical distribution and migration of plutonium in the Loess Plateau, North Shaanxi, China

被引：16
|
作者：
Cao, Liguo [1 ]
Zhou, Zhengchao [1 ]
Wang, Ning [1 ]
Wang, Zhongtang [2 ]
机构：
[1] Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China
[2] China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Sichuan, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2019年 / 322卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Plutonium; Soils; Vertical distribution; Migration behavior; Loess Plateau; SOIL-EROSION; PU ISOTOPES; FOREST SOIL; FALLOUT; CS-137; RADIONUCLIDES; ENVIRONMENT; GRASSLAND; REGION; AM-241;
D O I：
10.1007/s10967-019-06744-x
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The vertical distribution and migration behavior of Pu239+240 in a soil core in northern Loess Plateau in Shaanxi Province was investigated. The results showed that the Pu239+240 activity concentration was in the range of 0.02-0.75 mBq/g. The measured atom ratios of Pu-240/Pu-239 in the soil profile varied from 0.179 to 0.201 and were consistent with the typical global fallout. The inventory of Pu239+240 was 66 Bq/m(2) in the sampling site and the proportion of Pu in the first 10 cm top layer accounted for around 75%. The apparent convection velocity and effective dispersion coefficient were 0.19 cm/year and 0.12 cm(2)/year by the convection dispersion equation model, respectively. Further investigation is still highly required to clarify the dominant factors that control Pu migration.
引用
收藏
页码：649 / 654
页数：6
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