Recent Lithuanian peri-urban ombrotrophic bog records: indices derived from the contents of lead, zinc, copper and nickel

Abstract

Two Lithuanian c . 50-cm long peat cores from ombrotrophic bogs were analysed, namely, Rėkyva near Šiauliai and Žudiškės near Vilnius. Ash content, bulk density, chemical element concentrations determined by EDXRF and 210 Pb dating by gamma spectrometric methods were used. Geochemical data of deep Rėkyva peatland mine layers, dated by 14 C to the BC/AD boundary, enable the estimation of reference values for the calculation of increase coefficients (IC) in the young (formed after 1900) layers of cores, where IC values exceed 26.3 for Pb, 2.9 for Zn, 2.4 for Cu and 2.3 for Ni. The young layers compared to the older ones are characterized by an increase of ash and most elemental contents and the disappearance of a positive correlation between ash and Pb, Zn, Cu, Ni contents. Higher median values of IC and the anthropogenic accumulation rate (AR) in young Rėkyva are predetermined mainly by soil dust, higher median enrichment factors (EF) of Zn, Cu, Ni and median percentages of their anthropogenic component by higher industrialization of Vilnius and the leeward location of Žudiškės. The timing of maximum or next high EF and anthropogenic AR (mg m –2 yr –1 ) of Pb (10.1), Zn (7.0), Cu (1.1), Ni (1.2) in Žudiškės (1970-1974) corresponds to general results over Europe.

Heavy metals accumulation by the vegetation of the territory of the East Kazakhstan

“…Due to selective absorption, chemical elements enter the plant in favorable proportions for life [8][9][10]. This is especially evident in various plant organs, where chemical elements have their specific function.…”

“…The content of heavy metals in the explored soils was determined on the KFK-3 device by a photocolorimetric dithizone method by G.Ya. Rin'kis's recipe [6][7][8][9][10]. The reproducibility of the method was equal to ± 4.2%.…”

“…The chemical composition of the plant is a result of the selective relationship of organisms to elements of content in the soil [1,2]. In various geochemical conditions, the chemical composition and metabolism of plants, even in the representatives of one species, can differ significantly [3]. The plant specific features, soil type, concentration, form of HM finding, soil pH, its granulometric composition, organic matter content, cation absorption capacity in soil, availability of technogenic sources of ecosystem pollution has impact on flow of HM into plants [4][5][6].…”

Influence of site-classification approach on geochemical background values

“…soil with high organic matter content is not a textural class [19]. We studied only minerogenic soil, since peaty or organic soil needs separate research, as it may be greatly influenced by anthropogenic pollution, as shown in the study of peri-urban ombrotrophic bog records [42].…”

Fractional composition of compounds of zinc and lead in light chestnut soils

“…An information about the content of toxic ingredients in the soil of a particular region take a very important place at solving majority practical environmental problems of anthropogenic pollution [1][2][3][4][5][6]. At pollution level assessment as background usually take uncontaminated territories with a similar soil cover for which concentration of heavy metals is known [7,8].…”