Abstract

The concentrations of macrocomponents (Na, K, Mg, Ca, and P) and trace elements (Rb, Cs, Be, Sr, Ba, Mn, Fe, Co, Ni, Cu, Zn, Pb, Cd, Ag, Sn, Sb, Al, Ga, rare earth elements, Ti, Zr, Hf, Th, U, Nb, Ta, B, V, Cr, Ge, As, Mo, and W) were measured in 12 macrophyte species selected in the freshwater part of the Volga mouth area. Close correlations between the average specific contents were established: (a) most of the studied trace elements, which confirms the phenomenon of group concentration found earlier for heavy metals and chromium; (b) magnesium, calcium, and trace elements capable of their isomorphic substitution; (c) the typically biogenic elements potassium and phosphorus. A regular increase in the concentrations of trace elements and, to a lesser extent, of magnesium and calcium was found in the series “helophytes → large-leaved hydrophytes → variegate-leaved hydrophytes → small-leaved hydrophytes, including hydrophytes completely immersed in water,” which corresponds to an increase in the effective surface area of plants in the aquatic environment.

中文翻译：

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伏尔加河口区淡水部分大型植物中宏成分和微量元素的组成

摘要

宏观元素（Na，K，Mg，Ca和P）和痕量元素（Rb，Cs，Be，Sr，Ba，Mn，Fe，Co，Ni，Cu，Zn，Pb，Cd，Ag，Sn，在淡水部分选择的12种大型植物物种中测量了Sb，Al，Ga，稀土元素，Ti，Zr，Hf，Th，U，Nb，Ta，B，V，Cr，Ge，As，Mo和W）伏尔加河口区。在平均平均含量之间建立了密切的联系：（a）大多数研究的痕量元素，这证实了较早发现的重金属和铬的基团浓度现象；（b）能够同构取代的镁，钙和微量元素；（c）典型的生物成因元素钾和磷。微量元素浓度的定期增加，并且在较小程度上