Features of Mercury Accumulation in the Colchis Peat Bog (Ispan 2)

Mercury (Hg) belongs to the 1st class of toxic hazard substances and its MPC in soil is 2.1 mg/kg. It is known that Hg accumulates in peatlands by white moss, although it has been established that 30% of the accumulated mercury is emitted back into the atmosphere [1,3]. The aim of the study was to determine the peculiarity of mercury accumulation in layers, to find out whether the concentration of accumulated mercury exceeds the maximum permissible limit. The study area was the filter-type peatland Ispan 2 of the protected area of ​​the Kobuleti municipality, located in the Adjara region. Samples taken from the stratigraphic section were analyzed using an atomic adsorption spectrometer. It was determined that the analysis of a sample from the high-density buffer zone (sample I) at a depth of 0-100 cm revealed an average Hg concentration above the MAC of 5.59 mg/kg. Meanwhile, at a depth of 100-300 cm, the concentration of Hg is 0 or below the MAC. The density of the samples from the stratigraphic section of the dome (sample II) is low, saturated with water. The concentration of Hg at a depth of 100-200 cm is 0 or below the MAC. At a depth of 0-100 cm of the dome section, the average concentration of Hg is 5.88 mg / kg, at a depth of 100-200 cm, the MAC is low or equal to 0, at a depth of 200-250 cm it is 4.84 mg / kg, and reaches a maximum concentration at a depth of 250-300 cm - 18.7 mg / kg.