Advances in environmental research

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Nitrate reduction by iron supported bimetallic catalyst in low and high nitrogen regimes

  • Hamid, Shanawar (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Lee, Woojin (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2015.09.29
  • Accepted : 2015.12.03
  • Published : 2015.12.25
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Abstract

In this study, the effect of initial nitrate loading on nitrate removal and byproduct selectivity was evaluated in a continuous system. Nitrate removal decreased from 100% to 25% with the increase in nitrate loading from 10 to $300mg/L\;NO_3-N$. Ammonium selectivity decreased and nitrite selectivity increased, while nitrogen selectivity showed a peak shape in the same range of nitrate loading. The nitrate removal was enhanced at low catalyst to nitrate ratios and 100% nitrate removal was achieved at catalyst to nitrate ratio of ${\geq}33mg\;catalyst/mg\;NO_3-N$. Maximum nitrogen selectivity (47%) was observed at $66mg\;catalyst/mg\;NO_3-N$, showing that continuous Cu-Pd-NZVI system has a maximum removal capacity of 37 mg $NO_3{^-}-N/g_{catalyst}/h$. The results from this study emphasize that nitrate reduction in a bimetallic catalytic system could be sensitive to changes in optimized regimes.

Keywords

Acknowledgement

Supported by : Ministry of Environment

References

  1. Al Bahri, M., Calvo, L., Gilarranz, M.A., Rodriguez, J.J. and Epron, F. (2013), "Activated carbon supported metal catalysts for reduction of nitrate in water with high selectivity towards $N_2$", Appl. Catal. B-Environ., 138, 141-148.
  2. Bae, S. and Lee, W. (2014), "Influence of riboflavin on nanoscale zero-valent iron reactivity during the degradation of carbon tetrachloride", Environ. Sci. Technol., 48(4), 2368-2378. https://doi.org/10.1021/es4056565
  3. Bae, S., Jung, J. and Lee, W. (2013), "The effect of pH and zwitterionic buffers on catalytic nitrate reduction by $TiO_2$ bimetallic catalyst", Chem. Eng. J., 232, 327-337. https://doi.org/10.1016/j.cej.2013.07.099
  4. Choi, J., Batchelor, B., Won, C. and Chung, J. (2012), "Nitrate reduction by green rusts modified with trace metals", Chemosphere, 86(8), 860-865. https://doi.org/10.1016/j.chemosphere.2011.11.035
  5. Hamid, S., Bae, S., Lee, W., Amin, M.T. and Alazba, A.A. (2015), "Catalytic nitrate removal in continuous bimetallic Cu-Pd/NZVI system", Ind. Eng. Chem. Res., 54(24), 6247-6257. https://doi.org/10.1021/acs.iecr.5b01127
  6. Jung, J., Bae, S. and Lee, W. (2012), "Nitrate reduction by maghemite supported Cu-Pd bimetallic catalyst", Appl. Catal. B-Environ., 127, 148-158. https://doi.org/10.1016/j.apcatb.2012.08.017
  7. Jung, S., Bae, S. and Lee, W. (2014), "Development of Pd-Cu/Hematite catalyst for selective nitrate reduction", Environ. Sci. Technol., 48(16), 9651-9658. https://doi.org/10.1021/es502263p
  8. Kim, H., Kim, T., Ahn, V., Hwang, K., Park, J., Lim, T. and Hwang, I. (2012), "Aging characteristics and reactivity of two types of nanoscale zerovalent iron particles (FeBH and $FeH_2$) in nitrate reduction", Chem. Eng. J., 197, 16-23. https://doi.org/10.1016/j.cej.2012.05.018
  9. Lee, W., Batchelor, B. and Schlautman, M.A. (2000), "Reductive capacity of soils for chromium", Environ. Technol., 21(8), 953-963. https://doi.org/10.1080/09593332108618058
  10. Li, S., Wang, W., Yan, W. and Zhang, W. (2014), "Nanoscale zero-valent iron (nZVI) for the treatment of concentrated Cu(II) wastewater: a field demonstration", Environ. Sci.: Processes Impacts, 16(3), 524-533. https://doi.org/10.1039/C3EM00578J
  11. Liou, Y.H., Lin, C.J., Weng, S.C., Ou, H.H. and Lo, S.L. (2009), "Selective decomposition of aqueous nitrate into nitrogen using iron deposited bimetals", Environ. Sci. Technol., 43(7), 2482-2488. https://doi.org/10.1021/es802498k
  12. Liu, H., Guo, M. and Zhan, Y. (2014), "Nitrate removal by $Fe^0$/Pd/Cu nanocomposite in Groundwater", Environ. Technol., 35(7), 917-924. https://doi.org/10.1080/09593330.2013.856926
  13. Pintar, A. (2003), "Catalytic processes for the purification of drinking water and industrial effluents", Catal. Today, 77(4), 451-465. https://doi.org/10.1016/S0920-5861(02)00385-1
  14. Pirkanniemi, K. and Sillanpaab, M. (2002), "Heterogeneous water phase catalysis as an environmental application: a review", Chemosphere, 48(10), 1047-1060. https://doi.org/10.1016/S0045-6535(02)00168-6
  15. Shin, H., Jung, S., Bae, S., Lee, W. and Kim, H. (2014), "Nitrite reduction mechanism on a Pd surface", Environ. Sci. Technol., 48(21), 12768-12774. https://doi.org/10.1021/es503772x
  16. Soares, O.S.G.P., Orfa, J.J.M., Gallegos-Suarez, E., Castillejos, E., Rodriguez-Ramos, I. and Pereira, M.F.R. (2012), "Nitrate reduction over a PdCu/MWCNT catalyst: application to a polluted groundwater", Environ. Technol., 33(20), 2353-2358. https://doi.org/10.1080/09593330.2012.668945

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