Techno Press


Advances in Environmental Research   Volume 5, Number 1, March 2016, pages 51-59
DOI: http://dx.doi.org/10.12989/aer.2016.5.1.051
 
Reduction of nitrate in groundwater by hematite supported bimetallic catalyst
Shanawar Hamid and Woojin Lee

 
Abstract     [Full Text]
    In this study, nitrate reduction of real groundwater sample by 2.2%Cu-1.6%Pd-hematite catalyst was evaluated at different nitrate concentrations, catalyst concentrations, and recycling. Results show that the nitrate reduction is improved by increasing the catalyst concentration. Specific nitrate removal by 2.2%Cu-1.6%Pd-hematite increased linearly with the increase of nitrate concentration showing that the catalyst possesses significantly higher reduction capacity. More than 95% nitrate reduction was observed over five recycles by 2.2%Cu-1.6%Pd-hematite with ~56% nitrogen selectivity in all recycling batches. The results from this study indicate that stable reduction of nitrate in groundwater can be achieved by 2.2%Cu- 1.6%Pd-hematite over the wide range of initial nitrate inputs.
 
Key Words
    bimetallic catalyst; Cu-Pd-hematite; nitrate reduction in groundwater; specific nitrate removal; catalyst recycling
 
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