EFFICIENCY OF USING BAKED SOIL ON REMOVING SOME HEAVY METALS FROM DIFFERENT WATER SOURCES

Abstract

 A laboratory experiment was carried out to study the effect of unbaked soil  and baked soil  burned  at 400⁰C and 900⁰C as filters to remove some  heavy metals (Mn,Cu,Pb,Cd) from three water sources (waste water, Shatt al-Arab and Shatt al-Basra) at four periods (0 , 1/2 , 1, 24 hours. Concentrations of these heavy metals were estimated  before and after passing through these  filters , and removal efficiency was calculated . The results showed that baked soil  at  900⁰C had the highest removal efficiency  compared with that of 400⁰C and without baking.  Filtration at 24 hours was the best among other studied periods. The highest removal efficiencies were 95.20% foe Mn at Shatt al-Arab , 67.83% for Cu at Shatt al-Basra , 66.13% for Pb at Shatt al-Basra and 82.82% for Cd at Shatt al-Arab.