HEAVY METAL CONCENTRATIONS IN WATER AND BOTTOM SEDIMENTS OF SMALL WATER RESERVOIR IN KANIOW

The paper presents the results of investigations on concentrations of ions of selected heavy metals (Fe, Cr, Zn, Ni, Mn, Cu, Pb, Cd, and Hg) in sediments and water in a small dammed reservoir located in Kaniow (the Swietokrzyskie Province, Poland) on the stream flowing from Borowa Gora (Borowa Mount). The sediments and water were collected from the upper, middle, and lower part of the reservoir. The samples were collected twice, first in July 2012, and then in March 2013. The content of trace elements in water did not exceed: 801 mu g.dm(-3) (Fe), 0.064 mu g.dm(-3) (Cr), 13.5 mu g.dm(-3) (Zn), 0.106 mu g.dm(-3) (Ni), 285 mu g.dm(-3) (Mn), 2.35 mu g.dm(-3) (Cu), 6.98 mu g.dm(-3) (Pb), and 3.35 mu g.dm(-3) (Cd). As regards bottom sediments, the maximum recorded concentrations of heavy metals were: 872 mg.kg(-1) (Fe), 15.19 mg.kg(-1) (Cr), 26.26mg.kg(-1) (Zn), 16.26 mg.kg(-1) (Ni), 750 mg.kg(-1) (Mn), 3.58 mg.kg(-1) (Cu), 82.56 mg.kg(-1) (Pb), 0.73 mg.kg(-1) (Cd), and 0.0031 mg.kg(-1) (Hg). An attempt to determine the mathematical relationship between the content of organic matter in sediments and heavy metals was made and the possibility of agricultural utilization of sediments after removal from the bottom was determined.