Abstract
This research was aimed to study the efficiency of activated carbon to remove Disinfection By-Products (DBPs) from drinking water. This work studies the main compounds of DBPs Trichloromethane (TCM) and Trichloroacetic acid (TCA) at the effect of Temperature (25−35 C°), pH (4−9), adsorbate initial concentration (4−124 mg/l) for TCM, (4−100 mg/l) for TCA and adsorbent weight (15−20 g) of activated carbon. The results show that the adsorption capacity decreases with temperature and pH increasing, and increases with initial adsorbate concentration and adsorbent weight increasing. The kinetics of the adsorption was studies and the results showed that it followed the pseudo-first-order kinetics, also the thermodynamic parameters were determined for adsorption process where the results showed that the adsorption of TCM and TCA on activated carbon was spontaneously and exothermic. The Langmuir and Freundlich isotherms constants were determined for TCM and TCA, at the end of this work eight tap water samples from Baghdad University tap water were tested to determine TCM and TCA concentrations then treated with activated carbon where the removal efficiency was (98.1% − 99.37 %).
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