High thallium concentrations were found in plants and fungi growing 0.5-2 km from the flotation waste reservoir serving the Bolesław Mining and Metallurgical Works in Bukowno. Rinsed pine needles contained 2.20 ± 0.72 mg/kg d.w. thallium, moss Pleurozium schreberi 4.89 ± 2.00, moss Catharinea sp. 12.65, lichen Cladonia sp. 2.80 ± 1.01 and edible mushrooms 3.48-4.76. Vegetables from a village (Starczynów) closest to the reservoir contained 1.28-3.70 mg/kg d.w. thallium. The inhabitants are threatened by thallium pollution. In natural conditions the element concentrations in biological samples usually do not exceed 0.0X-0.X mg/kg d.w. Only fruit samples from the studied area and all the control samples were devoid of thallium.
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