Examination of the impact of contaminated soil on the concentration of heavy metals in vegetables

The aim of this research was to determine the concentration of lead, copper, cadmium, zinc in the soil of different pH, as well as the degree of pollution, and impact of soil contamination on the concentration of heavy metals in vegetables. Stationary research was conducted in 2018 at the Faculty of Technology in Tuzla. The input of heavy metals into vegetables can be monitored with the known content of nutrients in the soil, including cations and anions, dry matter content, moisture, acidity expressed as pH, etc. Soil for monitoring was taken from a plot where various vegetable crops for organic agricultural production are grown. One part of the soil was used for monitoring the intake of natural content, and the second with the increased content of metals in the soil (samples in containers). After the analyzes were carried out, soil contamination has been done with mentioned heavy metals in trace. Contamination was perform by adding metals solution to the soil, which were prepared with chemicals high cleanliness. Using Al2 (SO4)3, pH of the soil was reduced from 7.5 -7.6 to 5.8 -6.1, in 18 containers for natural content and 18 containers for increased metal content. After adjusting the acidity, the adjustment of the natural soil parameters was made so that six experiments with different conditions for observing the input of heavy metals into three cultures were obtained.The concentrations of heavy metals in soil and vegetables were measured on the atomic absorption spectrophotometer (Analyst 200) and on an inductively coupled plasma by the ICP-OES optical emission method (Optima 2100 DV), by an electroanalytic method of differential pulse anodic striping voltammetry (Differential Pulse Anodic Stripping Voltammetry, DPASV), and standard analytical procedures.