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首页> 外文期刊>Journal of Environmental Science and Health. A, Toxic/Hazardous Substances & Environmental Engineering >Phytoextraction of arsenic forms in selected tree species growing in As-polluted mining sludge
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Phytoextraction of arsenic forms in selected tree species growing in As-polluted mining sludge

机译：植物提取砷污染采矿污泥中某些树种的砷形态

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摘要

The aim of this study was to determine the phytoextraction of inorganic (As(III), As(V)) and organic arsenic (As-org) forms in six tree species: Acer platanoides, Acer pseudoplatanus, Betula pendula, Quercus robur, Tilia cordata and Ulmus laevis. Plants were grown in a pot experiment using As-polluted mining sludge for 90 days. Arsenic (As-total) was accumulated mainly in the roots of all six tree species, which were generally thinner, shorter and/or black after the experiment. The highest concentration of As(III) and As(V) was determined in the roots of A. pseudoplatanus and A. platanoides (174 and 420 mg kg(-1), respectively). High concentrations of As(III) were also recorded in the shoots of B. pendula (11.9 mg kg(-1)) and As(V) in the aerial parts of U. laevis and A. pseudoplatanus (77.4 and 70.1 mg kg(-1)). With some exceptions, the dominant form in the tree organs was As-org, present in mining sludge in low concentration. This form has a decisive influence on As phytoextraction by young tree seedlings even though its BCF value was the only one lower than 1. The obtained results highlight the important role of speciation studies in assessing the response of plants growing in heavily polluted mining sludge.
机译：这项研究的目的是确定六个树种中的无机（As（III），As（V））和有机砷（As-org）形式的植物提取物：枫木宏ano，枫木宏pseudo，白桦，栎栎，T树科尔达塔和榆。在盆栽实验中使用被As污染的采矿污泥培养植物90天。砷（总砷）主要积累在所有六个树种的根中，实验后这些树通常较稀，较短和/或呈黑色。测定了假白扁豆和白扁豆的根中As（III）和As（V）的最高浓度（分别为174和420 mg kg（-1））。在U. laevis和拟假单胞菌的空中部分的B. pendula（11.9 mg kg（-1））和As（V）的芽中也记录了高浓度的As（III）（77.4和70.1 mg kg（ -1））。除某些例外，树木器官中的主要形式为As-org，以低浓度存在于采矿污泥中。尽管它的BCF值仅是低于1的一种，但这种形式对幼树幼苗的砷植物提取具有决定性的影响。获得的结果突出了物种学研究在评估严重污染的采矿污泥中生长的植物的反应中的重要作用。

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