Removing Manganese and Chromium from Drinking Water using Tannin-based biosorbents

Water is a vital source, essential for whole aspects of humanity and ecosystem existence. Unique of the greatest commanding ecological problems currently is earth water pollution among the extensive variety of pollutants affecting water incomes, heavy metals cause-specific anxiety due to their robust poisonousness even with little attentions. This study was designed for the synthesis of condensed tannin resin from leaves of the Acacia nilotica plant to remove heavy metals manganese and chromium from drinking water samples collected from Alrazi station for drinking water production in Alrazi Street, Baqubah, Iraq. Water sample treatment with condensed tannin resin was taken every ten minutes for a full hour to measure the amount of removing heavy metals. The results showed that condensed tannin resin was the most efficient in removing heavy metals manganese and chromium. The concentration of manganese recorded the following values 0.041, 0.038, 0.034, 0.032, 0.029 and 0.029 respectively, every ten minutes for a full hour with removing rate 39.6% compared with the value of control sample recorded 0.048, While the concentration of chromium recorded the following values 0.012, 0.010, 0.008, 0.007, 0.005 and 0.005 respectively every ten minutes for a full hour with removing rate 70.6% compared with the value of control sample recorded 0.017. The study of the adsorption kinetics of heavy metals manganese and chromium for both uptake capacity of heavy metal by condensed tannin resin and reach equilibrium was at a fixed time for each mineral above. The condensed tannin resin extracted from leaves of the Acacia nilotica plant was efficient in removing heavy metals manganese and chromium from drinking water.