Migration and Distribution Fluxes of Plutonium Radioisotopes in Coastal Semiclosed Marine Areas

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-01 DOI:10.1134/s0001437023070135

A. A. Paraskiv, N. N. Tereshchenko, V. Yu. Proskurnin, O. D. Chuzhikova-Proskurnina, M. O. Vakhrushev

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Abstract

The article presents the results of a quantitative determination of the migration and distribution fluxes of plutonium radioisotopes ^{239 + 240}Pu in coastal semiclosed marine ecosystems from a case study example of Sevastopol Bay (Black Sea) to assess the self-purification of water masses from ^{239 + 240}Pu. The assessment was based on a study of the current (2018–2021) levels of the activity concentration of ^{239 + 240}Pu in water, bottom sediments, perennial brown macroalgae, and benthic fish. It has been found that the main ^{239 + 240}Pu removal flux (more than 93% of the total flux), which determines the self-purification of water masses with respect to ^{239 + 240}Pu in coastal marine areas is the sediment flux of suspended particle matter, which causes redistribution of ^{239 + 240}Pu into bottom sediments. ^{239 + 240}Pu migration to neighboring water areas due to hydrological processes is insignificant, as well as the decrease in ^{239 + 240}Pu in the ecosystem due to radioactive decay. In total, these processes accounted for less than 1% of the total flux. The interaction of ^{239 + 240}Pu with macrobiota accounted for almost 6%, of which more than 5% was provided by macrophytes.

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沿海半封闭海域钚放射性同位素的迁移和分布通量

摘要本文介绍了塞瓦斯托波尔湾（黑海）案例研究中对钚放射性同位素 239 + 240Pu 在沿海半封闭海洋生态系统中的迁移和分布通量进行定量测定的结果，以评估水体中 239 + 240Pu 的自净能力。该评估基于对当前（2018-2021 年）水、底层沉积物、多年生褐色大型藻类和底栖鱼类中 239 + 240Pu 活性浓度水平的研究。研究发现，决定沿海海域水体 239 + 240Pu 自净能力的主要 239 + 240Pu 清除通量（占总通量的 93% 以上）是悬浮颗粒物质的沉积通量，它导致 239 + 240Pu 重新分布到底层沉积物中。水文过程导致的 239 + 240Pu 向邻近水域的迁移以及放射性衰变导致的生态系统中 239 + 240Pu 的减少微不足道。这些过程总共占总通量的 1%以下。239 + 240Pu 与大型生物群的相互作用占近 6%，其中 5%以上由大型生物群提供。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.