engleski

LEAD DISTRIBUTION IN AIR, SOIL AND SEA SEDIMENT IN SPLIT AREA

Characteristics of heavy metals are their accumulation in soils, sediments, seawater, ground water, even in treated wastewaters as threat to the environment and humans. Lead is one of the most toxic heavy metals affecting the environment. It comes into environment through the combustion of fossil fuels and waste from the process of smelting works, leachate from mining pits, from galvanizing plants. The lead content was determined in the air, soil and surface sediments from December 2007. to December 2008. Lead concentration in air were in the range from 0.52 to 241.42 (µg m-2 day-1), with an average value of 24.57 ± 34.44. In the soil content was found from 11.33 to 66.13 (mg kg-1) and average value of 35.96 ± 15.10, in the surface sediments ranged from 31.22 to 144.41 (mg kg-1) with average value 67.41 ± 28.42. In air the highest lead values were determined on a site between two cement factories, and in the soil at the location near roads. In the sea sediment, the highest concentrations were measured in the eastern part of the Kaštela bay. The lead content in the air at all stations was above limit values recommended by the Law on Air Protection (NN178/04), except station between two cement factories where is moderately contaminated. The results obtained for soil and surface sediments in this study were obtained in the ranges of soil in Croatia and sediment in the Adriatic.

lead; surface sediment; soil; air

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