بررسي عناصر سنگين كروم، كادميوم، سرب و مواد آلي در سفيدرود با نگرشي بر منشا زمين ساختاري آنها

Study 011 the heavy metals (Cr, Cd, Pb,) and organic materials of sefid-Rud River with respect to their geological origion

In this study, inorder to determine physical and chemical properties and measure following heavy metals concentration: Cd, Cr and Pb, water and sediments samples were collected from 5 stations along Sefid-Rud river in autumn and winter 2009- 2010. Geographical maps, topography and land useage of areas along the river were determined by Geographical Information System (GIS). The results showed that heay metals concentration (Cd and Pb) were recorded near or higherʹ than standard level in water samples of Garjeh station and in the sediment of this station, following heavy metals Cr and Cd had the highest level. In this study, industrial activities, Urban and domestic sewage discharge were determined as the main source of Cd and Pb in the sediments. The extracted organic matter from water samples indicated that in addition to petroleum hydrocarbons existence in water,some unknown organic substances with high concentration were peresent in industrial effluents related to organic materials. Based on the GIS maps, geological structures had no role in contaminating of the river.