Heavy metals in plants on the territory of Dzhida tungsten-molybdenum combine (Western Transbaikal region)

The article studies the concentration of heavy metals (HM) in plants on territory of Dzhida tungsten-molybdenum combine (Western Transbaikal Region). The objects of the study were plants growing on alluvial dark humus soil (Fluvisols) - the background area, on man-made sand and soils of reclaimed areas. The content of the exchange form of TM exceeded the MPC for the content of Cd, Cu, Ni and Zn in the soils of reclaimed areas, Cr, Ni and Pb - in man-made sand and did not exceed in the background soil. The concentration of HM in plants had different levels and variability. It was found that in the aboveground part of the plants of reclaimed contours, the concentrations of HM in most cases exceeded their average content in the vegetation of continents. For plants in the area of man-made sand, this excess was observed for Cd, Mo and Pb, and in the background area - for Cd, Co, Mo and Pb. In general, we have determined a relatively high content of HM in the aboveground mass of plants growing in the contour No. 1, and a minimum content in the background area and man-made sand. The concentration of elements in the underground mass is much higher than in the aboveground mass. In the underground mass of plants, the relatively maximum concentration was found on contour No. 1 and man-made sand, while the minimum concentration was found in the background area. The dominant elements in plants were Mn, Zn, Cu, and Pb. The levels of HM concentration in plants depend on the content of their mobile forms. The values of the biogeochemical mobility coefficient (Вх) had a wide range of fluctuations for the underground mass and a relatively narrow range for the aboveground mass. The available forms of Mo and Zn were actively extracted by plants (Вх >1). In the background area, plants actively absorbed and moved Cd, Cu, Mo, Pb, Zn to the aboveground part. Most of the studied elements (Cd, Co, Cu, Mn, Ni, Cr) had a value of Вх function show_eabstract() { $('#eabstract1').hide(); $('#eabstract2').show(); $('#eabstract_expand').hide(); }