Water Treatment of the Khosar in Mosul City By Using Alum and Activated Carbon(Arbic)

Abstract

This study aimed at treating the water of Al-Khosar in Mosul City , by using the alum as a coagulant and then treat the supernatant by adsorption on the activated carbon . The optimum doses of alum were (10 , 15 , 20 ) mg/l . At ( 20 ) mg/l , the alum achieved highest removal of (COD , Nitrate , Turbidity , Cd , Cu ) , which were ( 33% , 32.6% , 99% , 71.2% , 85% ) respectively . Then the supernatant treated by adsorption on the activated carbon were achieved removal efficiency of pollutants mension above (46.6% , 71.4% , 87% , 44.4% , 25%) respectively.At (15) mg/l of alum , the alum achieved highest removal of ( pb , Hardness, Magnesium, Calcium, and Sodium) which were ( 68%, 33.7%, 19.6%, 16.6%, 36.8%) respectively. The activated carbon achieved removal efficiencies for the supernatant at (15)mg/l (33% , 16% , 15% , 18.1%, 31.8% ) respectively . Whereas (10) mg/l of alum achieved best removal for the (Zn ,Phosphate , Chloride) which were (66%, 41% , 22.5%) respectively . The supernatant adsorped on activated carbon achieved removal efficiency ( 54%, 60% , 35.4%) respectively . The treated water was low in Sodium and suitable for most plants , and the pH value is in the range , and the heavy metals concentrations were in the range of normal water . Key Words : the Khosar , Coagulation , Alum , Adsorption , Activated Carbon , Heavy Metals .