Uranium, thorium and rare earth elements in macrofungi: what are the genuine concentrations?
Uranium, thorium and rare earth elements in macrofungi: what are the genuine concentrations?
复制标题
DOI：
10.1007/s10534-011-9435-4
复制
发表时间：
2011-10-01
期刊：
影响因子：
3.5
通讯作者：
Dunn, Colin E.
中科院分区：
文献类型：
--
作者：
Borovicka, Jan;Kubrova, Jaroslava;Dunn, Colin E.
采用电感耦合等离子体质谱（ICP-MS）分析了不同基岩地球化学条件下36种外生菌根（26个样品）和腐土（25个样品）大型真菌中铀、钍和稀土元素（REE）的含量。使用经认证的参考物质（BCR-670，BCR-667，NIST-1575 a）支持分析结果，并通过超热中子活化分析（ENAA）验证了铀测定的可靠性。最近发表的关于这些元素的数据似乎是错误的，部分原因是使用了不适当的分析方法;部分原因是土壤颗粒的明显污染导致钍和稀土元素水平升高。一般来说，未受污染地区的大型真菌不会积累高水平的调查金属。铀和钍的浓度一般分别低于30和125 μ g kg（-1）（干重）。大型真菌中稀土元素的含量不超过360 μ g kg（-1）（干重），其分布基本上遵循后太古代页岩和黄土中的趋势。
Concentrations of uranium, thorium and rare earth elements (REE) in 36 species of ectomycorrhizal (26 samples) and saprobic (25 samples) macrofungi from unpolluted sites with differing bedrock geochemistry were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). Analytical results are supported by use of certified reference materials (BCR-670, BCR-667, NIST-1575a) and the reliability of the determination of uranium was verified by epithermal neutron activation analysis (ENAA). It appears that data recently published on these elements are erroneous, in part because of use of an inappropriate analytical method; and in part because of apparent contamination by soil particles resulting in elevated levels of thorium and REE. Macrofungi from unpolluted areas, in general, did not accumulate high levels of the investigated metals. Concentrations of uranium and thorium were generally below 30 and 125 mu g kg(-1) (dry weight), respectively. Concentrations of REE in macrofungi did not exceed 360 mu g kg(-1) (dry weight) and their distribution more or less followed the trend observed in post-Archean shales and loess.