Influence du mode de contamination sur l'élimination du cobalt 60 par une phanérogame, un mollusque, un crustacé et un téléostéen dulçaquicole

Environmental Pollution (1970) Pub Date : 1979-09-01 DOI:10.1016/0013-9327(79)90054-5

C. Amiard-Triquet

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引用次数: 3

Abstract

⁶⁰Co enters the environment with radioactive wastes from nuclear power reactors and fuel reprocessing plants as well as a component of fallout from nuclear tests.

A study of ⁶⁰Co in freshwater organisms has been carried out in order to compare the influence of different modes of uptake (immersion in contaminated water, ingestion of radioactive food, contamination by both food and water) upon the subsequent elimination.

The loss of ⁶⁰Co by Canadian pondweed Elodea canadensis is monophasic. For animal species, this phenomenon is biphasic, independently of the mode of uptake.

On the other hand, the biological half-life changes in relation to the vector of contamination. The same result is observed for the relative importance of the different compartments. This is easily explained because the mode of uptake determines the distribution of ⁶⁰Co in the organisms.

The turnover of ⁶⁰Co in the organisms is slow and the physical half-life of this radionuclide is relatively important (T_p = 5·27 years). Thus, the possible consequences of the release of this pollutant on freshwater life must not be neglected.

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污染方式对贝类、软体动物、甲壳类动物和淡水硬骨鱼去除钴60的影响

60 . co随核动力反应堆和燃料后处理工厂的放射性废物以及核试验的沉降物的组成部分进入环境。对淡水生物中的60Co进行了一项研究，以比较不同的吸收模式(浸泡在受污染的水中、摄入放射性食物、食物和水的污染)对随后消除的影响。加拿大塘草对60Co的损失是单相的。对于动物物种来说，这种现象是双相的，与摄取方式无关。另一方面，生物半衰期随污染载体的变化而变化。对于不同隔室的相对重要性，观察到相同的结果。这很容易解释，因为吸收方式决定了60Co在生物体中的分布。60Co在生物体内的周转率较慢，该放射性核素的物理半衰期相对重要(Tp = 5.27年)。因此，这种污染物的释放对淡水生物可能造成的后果不容忽视。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Pollution (1970)

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