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首页> 外文期刊>World Journal of Nuclear Science and Technology >Transference Kinetics of Radionuclide 95Nb in the Aquatic Ecosystem
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Transference Kinetics of Radionuclide 95Nb in the Aquatic Ecosystem

机译：放射性核素95Nb在水生生态系统中的迁移动力学

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The dynamics of transportation, accumulation, diminishment and distribution of 95Nb in a simulated aquatic ecosystem was studied using the isotope-tracer technique, and a fitting equation was established by application of a closed, five-compartment model. The results showed that when 95Nb was introduced into an aquatic system, it was transported and transformed via deposition in combination with other ions, and adsorption and absorption by aquatic organisms, resulting in redistribution and accumulation in different parts of the organisms. Following addition, the spe- cific activity of 95Nb in water decreased sharply within a short time, and then after reaching a certain value, it decreased more slowly. Sediment accumulated large amounts of 95Nb through the exchange of ions. Hyacinth (Eichhornia crassipes) also adsorbed a large amount of 95Nb in a short period of time. Snails (Bellamya purificata) and fish (Carassius auratus) were found to have a poor adsorption capacity of 95Nb. The amount of 95Nb found in the snail flesh was greater than that in the shell, and the 95Nb found in the fish was mainly distributed in the viscera. The amount of 95Nb in each individual component of the experimental system was affected over time.
机译：利用同位素示踪技术研究了模拟水生生态系统中95 Nb的迁移，积累，减少和分布的动力学，并通过使用封闭的五室模型建立了拟合方程。结果表明，将95Nb引入水生系统后，会与其他离子结合通过沉积和水生生物的吸附和吸收进行迁移和转化，导致在生物的不同部位发生重新分布和积累。添加后，水中95Nb的比活度在短时间内急剧下降，然后达到一定值后，下降速度更慢。沉积物通过离子交换积累了大量的95Nb。风信子（凤眼莲）在短时间内也吸收了大量的95 Nb。蜗牛（Bellamya purificata）和鱼类（Carassius auratus）的吸附能力很差，仅为95Nb。在蜗牛肉中发现的95Nb的含量大于在壳中发现的95Nb的含量，在鱼类中发现的95Nb的含量主要分布在内脏中。随着时间的流逝，实验系统的每个组件中95Nb的量都会受到影响。

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