俄罗斯联邦A.O.Kovalevsky生物研究所Miroshnichenko, O. N.小组的一项最新研究，揭示了²¹⁰Po在北克里米亚运河及邻近灌溉土壤水生生态系统中的生物地球化学行为。相关论文于2024年7月16日发表于《地球化学学报》杂志。

本研究的主要目的是调查²¹⁰Po在北克里米亚运河(NCC)水生生态系统和邻近灌溉土壤中，非生物(水和底泥)和生物(浮游动物、软体动物、鱼类)组分中的分布特征，以及评估水生生物从吸收的²¹⁰Po的α-辐射中接收的剂量。样品采用国际通行的标准放射化学方法处理。用α-光谱OCTETE Plus复合物(ORTEC-AMETEK, USA)测定样品中²¹⁰Po的活性。测量误差不超过20%。

研究对象中²¹⁰Po活性浓度降低的顺序为：悬浮物(73.6Bq/kg d.w.)>土壤(32.5Bq/kg d.w.)≈底部沉积物(32.1Bq/kg d.w.)>软体动物(23.4Bq/kg w.w)>鱼(6.4Bq/kg ww)。水中悬浮物与其溶解部分之间的²¹⁰Po分配系数(K_d)值在1.4×10⁴-1.4×10⁵之间变化。NCC水生物的²¹⁰Po浓度系数(CF)在10³- 10⁴L/kg之间。北克里米亚运河水生物从²¹⁰Po的α辐射中吸收的辐射剂量计算结果明显低于建议剂量限值。

附：英文原文

Title: Biogeochemical behavior of ²¹⁰Po in the aquatic ecosystem of the North Crimean Canal and adjacent irrigated soils

Author: Korotkov, A. A., Mirzoeva, N. Yu., Miroshnichenko, O. N., Moseichenko, I. N.

Issue&Volume: 2024-07-16

Abstract: The main objectives of this study were to investigate the distribution features of the ²¹⁰Po in abiotic (water and bottom sediments) and biotic (zooplankton, mollusks, fish) components of the North Crimean Canal (NCC) aquatic ecosystem and adjacent irrigated soils as well as assessment of the doses received by water organisms from α-radiation of absorbed ²¹⁰Po. The samples were processed using standard radiochemical methods accepted in international practice. The activity of ²¹⁰Po in the samples was measured using the alpha-spectrometric OCTETE Plus complex (ORTEC-AMETEK, USA). The measurement error did not exceed 20%. Activity concentration of ²¹⁰Po in the studied objects decreased in the following rank: suspended matter (73.6 Bq/kg d.w.)>soils (32.5 Bq/kg d.w.) ≈ bottom sediments (32.1 Bq/kg d.w.)>mollusks (23.4 Bq/kg w.w.)>fish (6.4 Bq/kg w.w.). The ²¹⁰Po distribution coefficient (Kd) values in water between suspended matter and its dissolved parts varied within the 1.4×10⁴–1.4×10⁵ L/kg range. The concentration factors (CF) of ²¹⁰Po for hydrobionts of the NCC were in the range 10³–10⁴ L/kg. The calculated absorbed radiation doses from ²¹⁰Po alpha radiation for the hydrobionts of the North Crimean Canal were significantly below the recommended dose limits.

DOI: 10.1007/s11631-024-00721-2

Source: https://link.springer.com/article/10.1007/s11631-024-00721-2