Distribution of Np, Pu, and Am in Water, Suspended Matter, and Bottom Sediments of Peter the Great Bay

IF 0.9 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochemistry Pub Date : 2024-04-23 DOI:10.1134/S1066362224010156

N. V. Kuzmenkova, V. G. Petrov, A. K. Rozhkova, E. A. Tokar, K. Shi, S. N. Kalmykov, X. Hou

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Abstract

The content of ²³⁷Np, ^239,240Pu, and ²⁴¹Am in seawater, suspended matter, and bottom sediment cores of the Ussuri and Amur Bays, sampled in July 2021 and August 2022, was analyzed. The activity concentrations of ²³⁷Np, ^239,240Pu, and ²⁴¹Am in the water of Peter the Great Bay were determined for the first time and were found to be equal to (19–105) × 10^–3, 2.0–5.3, and 24.1–33.5 mBq/m³, respectively. The activity concentrations as well as the ²³⁹Pu/²⁴⁰Pu isotope ratio (⁓0.18) in the bottom sediments definitely indicate that global fallout is the main source of plutonium in the investigated territory. The sedimentation rates were determined for the Amur Bay (in the Razdolnaya River estuary), 0.9 mm/year, and for the Ussuri Bay, 4.1 mm/year. Actinide transfer coefficients were determined for Peter the Great Bay in the system dissolved forms (including colloids)–suspended matter–bottom sediment.

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彼得大帝湾水、悬浮物和底层沉积物中镎、钚和镅的分布情况

摘要分析了 2021 年 7 月和 2022 年 8 月采样的乌苏里和阿穆尔湾海水、悬浮物和底沉物岩心中 237Np、239,240Pu 和 241Am 的含量。首次测定了彼得大帝湾海水中 237Np、239,240Pu 和 241Am 的放射性浓度，结果发现它们分别等于 (19-105) × 10-3、2.0-5.3 和 24.1-33.5 mBq/m3。底层沉积物中的放射性浓度和 239Pu/240Pu 同位素比值（⁓0.18）无疑表明，全球沉降物是调查区域内钚的主要来源。经测定，阿穆尔湾（位于拉兹多尔纳亚河口）的沉积速率为 0.9 毫米/年，乌苏里湾为 4.1 毫米/年。测定了彼得大帝湾溶解物（包括胶体）-悬浮物-底泥系统中的锕系元素转移系数。

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来源期刊

Radiochemistry CHEMISTRY, INORGANIC & NUCLEAR-

CiteScore

1.30

自引率

33.30%

发文量

期刊介绍： Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.