Abstract
Removal of nitrate (NO3 −) by Eichhornia crassipes sp. in landfill leachate was investigated in this study. Characterization study on the leachates collected from Jeram Sanitary Landfill (young landfill) and Ayer Hitam Sanitary Landfill (old landfill) show interesting pattern in concentration of NO3 − . This study shows that concentration of NO3 − was higher in young landfill (27 mg/L) than that in old landfill (9 mg/L) at neutral pH. Finding of these results indicate that Eichhornia crassipes sp. has the ability to remove NO3 − at different concentrations in three days. Approximately 69 and 64 % of NO3 − that present in leachate from young landfill was removed in sample without dilution and 50 % dilution, respectively. While approximately 28 and 33.6 % of NO3 − present in leachate collected from old landfill was removed in similar dilution samples. This study is very significant to identify the capability of Eichhornia crassipes sp. to remove NO3 − in landfill leachate.
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