Evaluation of selenium levels for the water surfaces in southern of Iraq

Zuhair A. Abdulnabi, Wesal F.

Abstract

Fifteen stations from water surfaces were selected in southern of Iraq at Basra city , it was distrib uted on Euphrates river , Shatt al-arab and Main outfall Dr ain River . All water samples were collected from s urface water at 10-15 cm depth . Selenite and total Selenium we re measured by Spectrophotometric method through c omplex formation with Selenium(IV) in acidic medium from Hydrochloric acid , some physical properties of w ater were recorded in these stations . The results of recordi ng have shown the highest concentration of selenite ( 36.0069 μg/l) in station W 3 and lowest concentration( 12.224 μg/l) in station W 5 , while , the highest concentration of total Selenium( 54.413 μ g/l) was recorded in station W 8 and lowest concentration( 17.381 μ g/l) was recorded in station W 5 . Standard deviation of all stations (n=3) for Selenite and total Selenium were calculated, it shows at extent (0.013014 - 0.289165 ), ( 0.073961- 0.477617 ) respectively .

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