AWWA WQTC71510

A laboratory scale batch process was conducted to investigate the feasibility of a hybrid system of zero-valent iron (Fe⁰) with three different adsorbents for the removal of nitrate (NO₃^-) and ammonium ions (NH₄⁺) from aqueous solution. The maximum nitrate removal was observed for Fe⁰-sepiolite hybrid system at 45ºC for 24 h reaction time. The rate of NO₃^- removal increased with the increase in initial NO₃^- concentration. NH₄⁺ ions produced during the denitrification process by Fe⁰ were successfully removed by the adsorbents, with the removal efficiency in the order of GAC > sepiolite > filtralite. Results of the present study suggest that the use of hybrid systems could be a promising innovative technology for achieving simultaneous removal of NO₃^- and NH₄⁺ from aqueous solution. Includes 19 references, figures.