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Transfer of radionuclides to ants, mosses and lichens in semi-natural ecosystems

机译：放射性核素向半自然生态系统中的蚂蚁，苔藓和地衣的转移

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摘要

There is a scarcity of data on transfer of both natural and anthropogenic radionuclides to detritivorous invertebrates for use in the assessment of radiation exposure. Although mosses and lichens have been extensively used in biomonitoring programs, the data on transfer of radionuclides to these species are limited, particularly for natural radionuclides. To enhance the available data, activity concentrations of ~(137)Cs,~(226)Ra and ~(228)Ra were measured in ants, mosses and lichens and corresponding undisturbed soil collected from semi-natural ecosystems in Serbia and Montenegro and biota/soil concentration ratios (CR) calculated. Since the majority of internal dose to biota is expected to come from ~(40)K, the activity concentrations of this radionuclide were also determined. The mean CR values for ~(137)Cs, ~(226)Ra and ~(228)Ra in ants analyzed in this study were found to be 0.02, 0.06 and 0.02, respectively. The mean CR values of radionuclides in mosses were found to be 2.84 for ~(137)Cs, 0.19 for ~(226)Ra and 0.16 for ~(228)Ra, while those in lichens were found to be 1.08 for ~(137)Cs, 0.15 for ~(226)Ra and 0.13 for ~(227)Ra. The CR values obtained in this study were compared with default CR values used in the ERICA Tool database and also with those reported in other studies.
机译：缺乏用于将天然和人为放射性核素转移到有害无脊椎动物中以用于评估辐射暴露的数据。尽管苔藓和地衣已广泛用于生物监测计划中，但放射性核素向这些物种转移的数据仍然有限，特别是天然放射性核素。为了增强现有数据，在从塞尔维亚和黑山以及生物群落的半自然生态系统中收集的蚂蚁，苔藓和地衣以及相应的未扰动土壤中测量了〜（137）Cs，〜（226）Ra和〜（228）Ra的活性浓度/土壤浓度比（CR）。由于预计生物体内的大部分内部剂量都来自〜（40）K，因此还确定了这种放射性核素的活性浓度。在这项研究中分析的蚂蚁中〜（137）Cs，〜（226）Ra和〜（228）Ra的平均CR值分别为0.02、0.06和0.02。苔藓中放射性核素的平均CR值在〜（137）Cs下为2.84，在〜（226）Ra下为0.19在〜（228）Ra下为0.16，而在〜（137）C下地衣中的放射性核素的平均CR值为1.08。 Cs，〜（226）Ra为0.15，〜（227）Ra为0.13。将本研究中获得的CR值与ERICA Tool数据库中使用的默认CR值以及其他研究中报告的CR值进行比较。

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