Sunkiųjų metalų koncentracijos miško dirvožemiuose bei samanose šalia greitkelio Vilnius-Kaunas / | Heavy metals accumulation in the forest soils and mosses along highway.
2006
Grigalavičienė, Ilona, | Rutkovienė, Vida,
A growing number of motor vehicles in Lithuania causes a higher air, soil and plants pollution by motor transport emissions. One of the most hazardous pollutants, which have negative impact on a roadside environment, are heavy metals. Mosses are bioorganisms that take up nutrient and also contaminants, directly from air, so they clearly reflect the atmospheric deposition. The atmospheric deposition of heavy metals was investigated by using soil and moss samples. Topsoil (0–10 cm) and moss Pleurozium schreberi (Brid.) Mitt. samples were collected along the highway Vilnius–Kaunas at different distances from the road. All samples were analyzed for Pb, Cd and Cu by atomic absorption spectrophotometry using flame or graphite furnace techniques. According to the results of the study the highest concentrations of heavy metals in the forest topsoil and mosses were found at a distance of 5–10 m from the road and moving further (15–100 m) their content tended to decrease with the distance from the highway. The results of this investigation showed that the soils near the highway had significant enrichment particularly in Pb while in mosses the concentrations of Cu and Cd is significantly higher than in the soil.
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