Ecology, Environment and Conservation Paper

Vol 23, Issue 1, 2017; Page No.(1-5)

SPATIAL VARIABILITY OF CD AND PB IN ARABLE LAND OF THE ALBORZ DAM DOWNSTREAM BASIN IRAN

Ali Cherati Araei and Behnoush Jafari

Abstract

The objective of this research is to provide map of heavy metal of Cd and Pb distribution and evaluate pollution pattern in arable land of the Alborz Dam downstream basin in area of 95000 hectare. Total Cd and Pb content were extracted by 4M HNO3. Carbonate form of Cd and Pb were extracted by 0.05M Na2EDTA. Spatial distribution maps were drawn using the ordinary kriging method, in order to identify the most affected areas and the main pollution sources. Results showed that carbonate form of Cd and Pb were not acceded the maximum permitted standard level. Total content of Cd and Pb was normal, but in some areas is more than toxicity level. Soil contamination of Cd and Pb was mainly derived from anthropogenic activities such as agricultural practices and irrigation with polluted water.

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