Industries effect in enrichment of As, Cu and Zn in Zayanderoud river sediments
Subject Areas :
1 - عضو هئیت علمی دانشگاه آزاد اسلامی واحد میمه
Keywords: Heavy metals, Enrichment factor, Geoaccumulation index, Zayanderood watershed, Wast,
Abstract :
Zayanderoud river, located in Isfahan and Charmohale bakhtiyary provinces with a length of about 420 kmsflowing from west to east, is one of the most important rivers of Iran.The river is very important because of itsvarious applications of its water. Many heavy industries, discharge their waste water into the river, therefore,investigating river’s water in terms of heavy metals pollution and understanding aggregation and changes ofheavy metals in river’s water and sediments is of vital importance. For this reason, between Isfahan tobaghbahadoran that exist maximum of industries, 12 samples were taken from surface sediments in autumn of of2009, these samples after providing analyzed by ICP-MS method. The results showed that concentration ofheavy metals in zayanderoud river is very changeable, and the maximum amount was related to samples weretaken from zovb-e-ahan, baghbahadoran, zarinshahr bridge and falavarjan bridge stations. In order to study theeffects of Variables such as human and natural factores, the zamankhan station was selected as the standardstation and calculated enrichment coefficient of heavy metals with regard to this station. Results showed thatsediment regarding elements such as, As, Zn, Fe, Mn, Cr, Ni, Cu, … have high enrichment coefficient.Meanwhile to determine the rate of environmental pollution, geoaccumulation index in sampling stations werecalculated, this index showed that the more we get near to Isfahan, the more pollution we face with in thesesubstantces (is observed), and it is greatly seen in Ghadir station
