95Zr在蚕豆-土壤生态系统中的迁移与分布动态

Dynamics of transfer and distribution of 95Zr in the broadbean-soil ecosystem.

作者信息

Liu Li-Li, Shi Jian-Jun, Zhao Xi-Yue, Hua Yue-Jin

机构信息

Key Laboratory of Nuclear Agricultural Science of the Ministry of Agriculture, Institute of Nuclear Agricultural Science, Zhejiang University, Hangzhou 310029, China.

出版信息

J Environ Radioact. 2005;80(2):217-23. doi: 10.1016/j.jenvrad.2004.09.001.

DOI:10.1016/j.jenvrad.2004.09.001

PMID:15701384

Abstract

The transfer and distribution of (95)Zr in a simulated broadbean-soil system was studied by using isotope-tracer techniques. The results showed that the (95)Zr was mainly concentrated in the haulm, pod and root, and the activity concentration of (95)Zr in these tissues reached the maximum in the initial stage then decreased continuously. The activity concentration of (95)Zr in edible part-bean was relatively lower, which was just near to the detection limit. The (95)Zr in soil was mainly (97%) deposited in surface layer soil (0-6 cm), indicating that the (95)Zr absorbed by surface soil could not be moved downwards easily because of the strong adsorption. The dynamics of (95)Zr concentrations in broadbean and soil were also confirmed by application of nonlinear regression method.

摘要

采用同位素示踪技术研究了（95）Zr在模拟蚕豆-土壤系统中的迁移与分布。结果表明，（95）Zr主要集中在茎、荚和根中，这些组织中（95）Zr的活度浓度在初始阶段达到最大值，然后持续下降。可食用部分——豆中（95）Zr的活度浓度相对较低，刚接近检测限。土壤中的（95）Zr主要（97%）沉积在表层土壤（0 - 6厘米）中，这表明表层土壤吸收的（95）Zr由于强烈吸附不易向下移动。通过应用非线性回归方法也证实了蚕豆和土壤中（95）Zr浓度的动态变化。