Nitrate (NO 3 -) is a commonly found contaminant in groundwater and surface water. It has created a major water quality problem worldwide. The laboratory batch experiments were conducted to investigate the feasibility of HCl-treated zero-valent iron (Fe 0) combined with different adsorbents as hybrid systems for simultaneous removal of nitrate (NO 3 -) and ammonium (NH 4 +) ions from aqueous solution. The maximum NO 3 - removal in combined Fe 0-granular activated carbon (GAC), Fe 0-filtralite and Fe 0-sepiolite systems was 86, 96 and 99%, respectively, at 45 °C for 24 h reaction time. The NO 3 - removal rate increased with the increase in initial NO 3 - concentration. The NO 3 - removal efficiency by hybrid systems was in the order of sepiolite > filtralite > GAC. The NH 4 + produced during the denitrification process by Fe 0 was 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 a hybrid system could be a promising technology for achieving simultaneous removal of NO 3 - and NH 4 + ions from aqueous solution.
|Original language||English (US)|
|Number of pages||6|
|Journal||Journal of Environmental Monitoring|
|State||Published - Apr 2012|