钷－147在模拟水域生态系中的行为

研究了在模似池塘小生境中，147Pm在水体、土壤及水生生物之间的转移和积累情况，建立了动力学模型。结果表明：其行为符合一级反应动力学模式；水生植物对¹⁴⁷Pm的浓缩能力最强；鱼对¹⁴⁷Pm的吸收极少；¹⁴⁷Pm在土壤中的渗透力较弱，80％浓缩于泥土表层1cm内。因此，水生植物可作为¹⁴⁷Pm污染水体的环境监测指示生物，并可用于净化被¹⁴⁷Pm污染的水体；土壤可以沉淀水体中的147Pm，对去污有一定效果。

Behaviour of promethium -147 in a simulated aquatic ecosystem

pm is one of the most important fission materials which contaminated environment.Aquatic ecosystem is an important part in agro-ecology systems.This paper studies the dynamic behaviour of 147Pm in a simulated aquatic ecosystem which consists of water,soil and aquatic organism.The results are as follows:Their behaviour can be expressed in an exponential function;the aquatic plants have the highest capacity of concentrating 147 Pm;the absorption of147 Pm by fishes is little;147Pm in soil has little penetrability,and about 80% of which accumulate within 1 cm of top soil.For these reasons,the aquatic plants can be used as the biomonitors and clcaning agents for contamination of147 Pm in water;soil can be used as precipitating agent of147Pin in water;it has some effects in decontamination of 147Pm in water.