Airborne contamination by heavy metals and aluminum in the freshwater ecosystems of the Kola subarctic region (Russia) / Moiseenko T. I., Kudryavtseva L. P., Rodyushkin I. V. [et al.] // The Science of the Total Environment. - 1995. - Т. 160/161. - С. 715-727.

718 T.I. Moiseenko et al. / Sci. Total Environ. 160/161 (1995) 715-727 N Fig. 1. Map of Fennoscandia showing the locations of smelters on the Kola Peninsula. The four subregions were: 1, ^3 0 km around the Pechenganikel plant; 2, < 30 km around the Severonikel plant; 3, 30-100 km around the smelters; 4, background subregion. The F-ratio value (F = 65.4) exceeds by more than fourfold the table values for this realization (n = 89), and the probability (P = 0.0000) evidences the high grade reliability of the equation. These significant criteria enable us to apply this equation of A l function from the pH value for prediction. A wide area (> 100 km) of high A l concentration in the lake bodies around the aluminum smelter is difficult to explain solely by emissions from the plant (Table 2). Apparently, its entry into the water bodies through acidic fallout is significant. Thus, the effects of local emissions of metals on lake chemistry are limited by the 30-km zone, and water acidification in the remote regions increases the concentration of elements in the water by mobilization of elements from the watershed. 3.2. Heavy metal concentration in lake sediments The ability of sediments to accumulate trace elements reveals that aquatic pollution around the smelters includes almost the whole spectrum of trace elements, with varying intensity