The content of microelements and iron in soils and plants in the basin of lake Kotokel’ in Western Transbaikalia

Abstract

The content of microelements (Mn, Zn, Cu, Co, Ni, Cr, Pb, and Cd) and Fe is determined in the soils and plants of the Lake Kotokel' basin. Their content in the soils is proved not to exceed the regional background and the existing MPC and APC. The content of Cd is revealed to exceed its clarke value for the world soils, which is related to the natural origin of this element. The concentrations of Mn, Co, and Pb are close to their clarke values, and those of Zn, Cu, Ni, and Cr are lower than their clarkes. The studied soils are specified by the maximal amount of the mobile forms of microelements. The profile distribution of the microelements differs depending on the genetic soil type. For Mn, Zn, and Cu, a significant biogenic accu mulation is pronounced in the organic soil horizons. The content of microelements in the aboveground phy tomass exceeds the maximal permissible levels for Mn, Co, Cr, and Fe. The intensity of the microelements absorption by the plants varies widely, being specified by the high coefficient of the biological adsorption (except for Fe). Mn, Zn, and Cu are accumulated in the plant phytomass the most intensely.

Vertical And Spatial Distribution Of Major And Trace Elements In Soil Catena At The Central Forest State Nature Biosphere Reserve (Se Valdai Hills, Russia)

“…When characterizing the conditions of migration and accumulation of heavy metals and metalloids (HMMs), the analysis of their total content is usually complemented by the fractionation, closely related to mobility which is often estimated in terms of extractability, i.e. the transition of compounds from soil to solution under the action of various reagents (Burachevskaya et al 2020;Shao et al 2020;Sungur et al 2021). The extracted fractions of HMMs are referred to as F1, F2, F3 in order of their recovery from the solid phase, i.e.…”

“…The ratio of F1+F2+F3 to the total content reflects the mobility of HMMs in soils (Yutong et al 2016). The F-analysis is a modern approach to studying the migration of chemical elements in soils and landscapes (Bolan et al 2014;Li et al 2019;Reimann et al 2018;Sosorova et al 2012;Gronflaten, Steinnes 2005;Semenkov et al 2016Semenkov et al , 2019Huang and Matzner 2007;Sosorova et al 2012;Motuzova 2014;Popova 2010;Kosheleva et al 2002Kosheleva et al , 2015.…”

“…In recent years in the international environmental programs of UNESCO and UNEP, special attention is paid to the assessment of background landscapes, which is mainly carried out in biosphere reserves. The studies of vertical differentiation of the element mobile fractions in Retisols show that F1 fractions of Zn, Mn, Fe (Sosorova et al 2012), F2 fractions of Mn, Pb, Mo (Gronflaten, Steinnes 2005; Semenkov et al 2016) and F3 fractions of As, Mn, Zn, Co, Pb (Semenkov et al 2016) accumulate in the A-horizon at the biogeochemical barrier. F1 fractions of Ni, Pb, As, Cu (Huang and Matzner 2007;Sosorova et al 2012;Motuzova 2014), F2 fractions of Zn (Popova 2010) accumulate at the sorption geochemical barrier in the A-and Bt-horizons and is depleted in the E-horizon.…”

“…The studies of vertical differentiation of the element mobile fractions in Retisols show that F1 fractions of Zn, Mn, Fe (Sosorova et al 2012), F2 fractions of Mn, Pb, Mo (Gronflaten, Steinnes 2005; Semenkov et al 2016) and F3 fractions of As, Mn, Zn, Co, Pb (Semenkov et al 2016) accumulate in the A-horizon at the biogeochemical barrier. F1 fractions of Ni, Pb, As, Cu (Huang and Matzner 2007;Sosorova et al 2012;Motuzova 2014), F2 fractions of Zn (Popova 2010) accumulate at the sorption geochemical barrier in the A-and Bt-horizons and is depleted in the E-horizon. F3 fractions of Fe, Co, Cr, Cu (Tolpeshta and Sokolova 2010;Semenkov et al 2019;Adriano 2001) are removed from the topsoil.…”