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Nitrate and ammonium ions removal from groundwater by a hybrid system of zero-valent iron combined with adsorbents

Title
Nitrate and ammonium ions removal from groundwater by a hybrid system of zero-valent iron combined with adsorbents
Author
전병훈
Keywords
activated carbon; adsorbent; ammonia; filtralite; ground water; iron; magnesium trisilicate; nitrate; unclassified drug; zero valent iron
Issue Date
2012-01
Publisher
Royal Society of Chemistry
Citation
JOURNAL OF ENVIRONMENTAL MONITORING, Vol.14, No.4 [2012], p1153-1158
Abstract
Nitrate (NO3-) 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 (NO3-) and ammonium (NH4+) ions from aqueous solution. The maximum NO3- 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 degrees C for 24 h reaction time. The NO3- removal rate increased with the increase in initial NO3- concentration. The NO3- removal efficiency by hybrid systems was in the order of sepiolite > filtralite > GAC. The NH4+ 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 NO3- and NH4+ ions from aqueous solution.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2012/EM/c2em10911e#!divAbstracthttp://hdl.handle.net/20.500.11754/67298
ISSN
2050-7887
DOI
10.1039/c2em10911e
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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