Abstract

Soleimani M. M. and Shayestehfar, A.

Seasonal fluctuations of heavy metals (Cadmium, Lead, Zinc, Nickel, Iron and Chromium) were studied in relation to water current, at three sampling stations from the bank of Kor River, from 15th March 2003 to 15th February 2004. The water and sediment samples were analyzed with the help of Atomic absorption methods (Perkins / Elmer Atomic absorption USA.). The data was statistically analyzed using ANOVA and coefficient correlation. The means of Zn, Ni. and Pb were increased significantly in water stations 2 and 3 when compared to the station 1 as control, while the means of Cd, Zn, Ni, Cr and Pb were equal in the sediment samples from stations 2 and 3, but the mentioned heavy metals were significantly increased in compared to control station. In addition, in raining seasons, high concentrations of the heavy metals at all stations, especially at station 2, were observed. The high concentration of the above heavy metals in the station 2 and 3 is possibly due to industrial pollutions and civil sewage where in raining season the high concentration of the heavy metals in all station particularly stations 2 and 3 is due to soil washing as well as water and sediment mixing due to heavy current of water at all the sampling stations. The mean of all elements were significantly increased (p < 0.05) in station 2 and 3 when compared to station 1.