Paper Title
Combined Electrochemical Oxidation and Adsorption Methods for Ammonia and Molybdenum(VI) Removal from Aqueous Solution

Abstract
Water pollution is a global issue. In the currentstudy, electrochemical oxidation (EO) and adsorption methods were applied to remove ammonia and molybdenum(VI) from aqueous solution. In the first step (contaminantelimination with EO), response surface methodology was employed to do statistical analysis. Contact time (1–3 h), initial concentration of pollutants (10–50 mg/L), and pH (3–6) were the three independent factors in this experiment. Sodium sulfate (as electrolyte) and Ti/RuO2–IrO2 (as electrode) were applied during EO. At the optimum performance in the EO, the contact time, the initial concentration of contaminants and pH were 2.4 h, 27.4 mg/L, and 4.9. And the removaleffectiveness for ammonia and molybdenum were 79.4%, 48.0%, and 55.9%, respectively. On the basis of the preliminary experiments, the current and voltage were set at 50 mA and 7 V, respectively. After treating water at optimum EO performance, the aqueous solution was moved to a granular composite adsorbent (BAZLSC) column. BAZLSC improved the removaleffectiveness for ammonia and molybdenum(VI) to 99.9%.. Keywords - Ammonia, Electrochemical oxidation, Molybdenum, RSM