Background: Nowadays, an accumulation of heavy metals in the environment is one the most important consideration in the world. Heavy metals due to their chemical stability, low flexibility and power of bioaccumulation in the body organism are becoming quickly toxic pollutants. This study was carried out to determine the heavy metals (e.g. Cadmium, Copper, Zinc and Lead) in the water and sediments of Amirkolayeh wetland in Guilan from Winter 2010 to Spring 2011 then they were compared to global scales.

Materials and Methods: Sampling was done at the three stations in Amir kolayeh wetland during Winter and Spring. At first, samples were dried by the wet methods and mixed acid then the chemical annualized were done. Concentrations of the heavy metals were determined by a flame atomic absorption spectrophotometer (FAAS).

Results: Results showed that the mean concentrations of heavy metals in water for Cu, Pb, Cd and Zn were 0.394±0.078, 0.03±0.007, 0.011±0.003 and 0.517±0.09mg/l and in sediments were 9.256±1.65, 0.626±0.12, 0.59±0.31 and 44.35±7.44mg/g, respectively.

Conclusion: The results of this study reveal that the heavy metal accumulation increases during the Spring season. Also, the order of the heavy metal accumulation in water and sediment was Zn>Cu>Pb>Cd. On the other hand, the concentrations of heavy metals in water and sediment were lower than the allowable international standards.