Cs-137 and K-40 in Cortinarius caperatus mushrooms (1996-2016) in Poland - Bioconcentration and estimated intake: Cs-137 in Cortinarius spp. from the Northern Hemisphere from 1974 to 2016

文献类型： 外文期刊

第一作者： Falandysz, Jerzy

作者： Falandysz, Jerzy;Falandysz, Jerzy;Falandysz, Jerzy;Zalewska, Tamara;Fernandes, Alwyn R.

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关键词： Exposure; Food; Fungi; Forest; Radiocaesium; Radiotoxicity; Soil

期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）

ISSN： 0269-7491

年卷期： 2019 年 255 卷

页码：

收录情况： SCI

摘要： Cortinarius caperatus grows in the northern regions of Europe, North America and Asia and is widely collected by mushroom foragers across Europe. This study shows that in the last three decades since the Chernobyl nuclear accident, C. caperatus collected across much of Northern Poland exhibited high activity concentrations of radiocaesium (Cs-137) - a long-lived radionuclide. The mushroom appears to efficiently bioconcentrate Cs-137 from contaminated soil substrata followed by sequestration into its morphological parts such as the cap and stipe which are used as food. The gradual leaching of Cs-137 into the lower strata of surface soils in exposed areas are likely to facilitate higher bioavailability to the mycelia of this species which penetrate to relatively greater depths and may account for the continuing high activity levels noticed in Polish samples (e.g. activity within caps in some locations was still at 11,000 Bq kg(-1) dw in 2008 relative to a peak of 18,000 in 2002). The associated dietary intake levels of Cs-137 have often exceeded the tolerance limits set by the European Union (370 and 600 Bq kg(-1) ww for children and adults respectively) during the years 1996-2010. Human dietary exposure to Cs-137 is influenced by the method of food preparation and may be mitigated by blanching followed by disposal of the water, rather than direct consumption after stir-frying or stewing. It may be prudent to provide precautionary advice and monitor activity levels, as this mushroom continues to be foraged by casual as well as experienced mushroom hunters. (C) 2019 Elsevier Ltd. All rights reserved.

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