Heavy metals in birch leaves around a nickel-copper smelter at Monchegorsk, northwestern Russia

https://doi.org/10.1016/0269-7491(95)00027-OGet rights and content

Abstract

Concentrations of metals in birch leaves were measured around the Severonikel smelter at Monchegorsk, Kola Peninsula, northwestern Russia, between 1991 and 1994. Concentrations of Ni, Cu and Fe near the smelter were 6–12 times higher than the recent regional background concentrations, while concentrations of Mn and Zn were 5–10 and 1.5–2 times lower, respectively. The regional background concentrations of Ni and Cu have increased 3–5 times during the last 20 years. Foliage concentrations of micronutrients (Zn and Mn) showed less annual variation than Ni and Cu. Contamination changed more sharply along the northeastern gradient than along the southern one. Subalpine birch forests were significantly less affected by Ni and Cu than lowland forests, but the lower concentration of Mn indicated a greater impact of SO2 in mountainous regions. Although birch accumulated relatively less pollutants than conifers, birch resistance to pollution makes it a possible indicator in environmental studies since it survives even within the wastelands where conifers have vanished.

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