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Sulfate content in some water systems within Erbil City/KRG by using turbidimetric and titrimetric methods.


Yahya Ahmed Shekha

Department of Environmental Science, College of Science, Salahaddin University



Abstract
This study was conducted on two water bodies; three sites were selected on Erbil
wastewater channel and four sites on Greater Zab river. Water samples were collected at
regular monthly interval periods beginning at July 2012 to April 2013. Sulfate
concentration was determined by EDTA titrimetric and barium sulfate procedures in
order to compare the results obtained by both methods. The mean values of sulfate
concentration in Greater Zab river was 74.98 and 1205.9 mg.l-1 for EDTA titrimetric and
barium sulfate methods respectively, while for Erbil wastewater channel samples sulfate
concentration mean values was 109.46 and 1240.5 mg.l-1 for EDTA titrimetric and
barium sulfate methods respectively. As a mean values sulfate concentration is ten times
more by barium sulfate method than other method. From standard error values it appears
that EDTA titrimetric method is more accurate and suitable for sulfate determination
than other method which is quick, simple and easy.

Key Words: Sulfate determination, turbidimetric method, EDTA titrimetric method, Greater Zab river, Erbil wastewater channel



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