The objective of this study was to evaluate heavy metals such as As, Cd, Ni, Cr, Pb, Cu, V and Ni in the surface sediments of Gamasiab River. This river located in west of Iran and it is the most important river in Nahavand city, a wide range of human activities take pl
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The objective of this study was to evaluate heavy metals such as As, Cd, Ni, Cr, Pb, Cu, V and Ni in the surface sediments of Gamasiab River. This river located in west of Iran and it is the most important river in Nahavand city, a wide range of human activities take place along the river. Examples include fish farming and agriculture activities. So the assessment of heavy metals in sediments of the river is necessary. The results show that the heavy metal concentration in the sediments decreased in the order Cr>Zn>Ni>As>Pb>Co>Mo>Cd. Variety of methods used to evaluate sediment contamination with heavy metals as enrichment factor, pollution load index, comparison of sediment quality guidelines and potential ecological risk of heavy metals. According to enrichment factor index, As and Cd have anthropogenic originates while Cr and Ni have geogenic originates. Some stations show a very high degree of Pb contamination. Samples 1 , 3 and to a lesser extent 2,6 and 8 showed a highest degree of toxicity. The correlation coefficient was used for communication between the elements. Results show that the anthropogenic Pb, Cu, Zn, As and Cd inputs were mostly related to the urban and Agriculture activities.
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