Abstract
Abstract High levels of heavy metals in the environment are dangerous for humans due to possible bioaccumulation of such contaminants by edible plants and herbivores. In this study, total content of cadmium and lead in the barrier dusts sampled from three noise barriers located along E261 expressway in Poland (near Poznań) was determined using flow-injection differential-pulse anodic stripping voltammetry (FIA DP-ASV). The results indicate that total content of the studied metals ranged from 0.09 to 0.6 mg kg-1 (in relation to cadmium) and from 11.873 to 38.193 mg kg-1 (in relation to lead) and depended on the structure of the barriers (i.e. their length) and height of the sampling point. The highest metal contents were detected in samples originated from lower sections (0.0-0.5 m) of the longest noise barrier (1700 m). The results indicate the need for a continuous monitoring of heavy metal contents in the barrier dusts and surrounding agricultural soils.
Highlights
The emission of metals into the atmosphere is associated with both natural and anthropogenic processes.While the greatest natural source of metal emission are volcanic eruptions, the primary anthropogenic sources of emission include the non-ferrous metal smelters, motor traffic and coal power plants.B
The content of cadmium ranged from 0.09 to 0.6 mg kg-1 depending on the sampling point height and length of the noise barrier
While investigating the influence of noise barriers on heavy metals dispersion, their water solubility and permeability in soil should be taken into account, since barrier dusts may be washed away from the barriers into surrounding soil by the rainfall
Summary
The aim of this study was to determine total cadmium and lead contents in barrier dusts sampled from three noise barriers located along expressway E261 in Poland
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