On mercury concentration in wild mushrooms ( Khabarovsk and the Khabarovsk territory)

The paper presents the results of research on mercury concentration in mushrooms collected in the Khabarovsk Territory, including the town, in the fall of 2022. The research shows that the mercury concentration in fruit body can widely vary dependent on the type and place of growth. Even for the same mushrooms type fruit bodies indicators can vary from several times to 2 orders. At this, the stems accumulate less mercury than the caps, and tubular mushrooms accumulate less mercury than lamellar ones. The study shows a surpass of maximum permissible concentration (MPC) for mercury index in more than half lamellar mushrooms, not revealed in tubular mushrooms. The maximum concentration of Hg (14 mg/kg of dry matter) and the maximum coefficient of biological absorption (45) were revealed for common meadow mushroom (Agaricus campestris), collected in the Khabarovsk downtown lawn. The other champignons there contained mercury 5-7 times less. The lowest mercury concentrations were found in polypore mushrooms. Concentration of mercury in them did not exceed 0.05 mg/kg of dry solids content, and the coefficient of biological absorption was in the range of 0.08-0.4.