Lead content in soil and lichen on the territory of the Karazhyra coal deposit

The features of the spatial distribution of the gross lead content and the forms of its compounds in the soils of the Karazhyra coal deposit, which is located in the East Kazakhstan region on the territory of the former Semipalatinsk nuclear test site, are investigated.

It was revealed that the average concentrations of lead in the soil of the deposit exceed the background values by 2.5 times, however, in relation to Clark, lead does not form significant anomalies in the soils in terms of intensity and contrast. The highest degree of heavy metal contamination was found in the northern part of the research object, which corresponds to the location of the on-board rock dump and coal loading ramp, as well as the wind rose. Minimal amounts of lead are concentrated in the soil in an easterly direction.

The maximum and minimum zones of accumulation of the chemical element in the lichen of Parmelia vagans growing in the technogenically polluted territory of the coal mine have been established. The average concentration of lead in lichen was 3.9 mg/kg, which exceeds the background level by 2.8 times. The calculated coefficient of biological absorption showed that lead, according to the ability of accumulation in lichen, according to the classification of A.N. Perelman, belongs to the elements of strong accumulation. A connection was found between the lead content in lichen and its accumulation in the soil cover of the studied object.

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