Trace element concentrations (Zn and Cd) in agricultural soils of Bosnia and Herzegovina

Jurica Jovića, V. Ivezića, V. Zebeca, D. Iljkića and Z. Lončarića

aFaculty of Agrobiotechincal Sciences Osijek, University of Josip Juraj Strossmayer, Croatia

jjovic@fazos.hr

Mountainous terrain of Bosnia and Herzegovina is a source of various ores which resulted with fifteen coal mines situated in a small area. Most of these coal mines are in the central and north-east part of the country. Also in the central part of the country there is a heavy industry of iron and steel factory. All of these can have an effect on the concentrations of heavy metals in the agricultural soils. The aim of our research was to run a preliminary analysis of trace elements (Zn and Cd) in the agricultural soils of Bosnia and Herzegovina. Soil samples were collected from five locations in Bosnia and Herzegovina. One location was in the south (Mostar- 10 samples), two in the central Bosnia and Herzegovina (Sarajevo – 10 samples and Žepće – 4 samples) and two in the North, North-west (Banja Luka – 5 samples and Prud – 5 samples). All together we collected 34 soil samples from agricultural fields at the depth of 0-30 cm. Samples were analysed for the concentration of total Zn and Cd by the Aqua regia extraction. The results showed that concentrations of potentially toxic trace element (Cd) as well as concentrations of micronutrient (Zn) were below the maximum permissible concentrations (MPC) for agricultural soils. Not even one sample showed any elevated levels of Zn or Cd. Average concentration of Zn was 103.7 mg/kg and average concentration of Cd 0.43 mg/kg. There were no significant differences of Zn and Cd concentrations between investigated locations, although highest values of Zn (120.7 mg/kg) and Cd (0.51 mg/kg) were found in the South (Mostar). When data was examined by region (North, Central and South) there were statistical differences for Cd where statistically significant concentrations of Cd were found in the South, compared to the North. Such significance was observed only for Cd and not for Zn. However, it is important to emphasise the concentrations of Cd were not above MPC at any location. Present research is preliminary investigation, more throughout investigation, with larger set of data is necessary to better understand anthropogenic impact on agricultural soils in Bosnia and Herzegovina.

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