Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
권호 표지
DOI QR코드

DOI QR Code

Performance of Self-Manufactured Ion Selective Microelectrode (ISME) for Continuous Monitoring of Ammonia and Nitrate Ions

  • Byun, Im-Gyu (Institute for Environmental Technology and Industry, Pusan National University)
  • Received : 2012.10.15
  • Accepted : 2012.12.26
  • Published : 2012.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

The ion selective microelectrodes (ISME) have been applied to observe the continuous profiles of NO3-N and NH4-N in bulk solutions or biofilms. In order to evaluate the performance and applicability of ion concentration measuring system, the characteristics, such as slope of calibration curve, detection limit and potentiometric selectivity coefficient were investigated. The slopes of calibration curve showed high degree of correspondence for each target ion concentrations. And the detection limits of nitrate and ammonia ion selective microelectrode were 10-4.7 M and 10-4.4 M, respectively. These ion selective microelectrodes were proved that their own performance could be maintained for 16 days after making. NO3-N and NH4-N selective microelectrodes were also adapted to detect the continuous ion profiles of cilia media packed MLE (Modified Ludzack-Ettinger) process. And the monitored nitrate and ammonia ion profiles with the ion selective microelectrode were stable and well corresponded to the results with conventional ion chromatograph. However, the electric potential was unstable until 8 hr because of the unknown noise. The tip shape and performance of the ion selective microelectrode was stably kept over 2 days continuous monitoring.

Keywords

References

  1. De Beer, D., van den Heuvel, J. C., Ottengraf, S. P. C., 1993, Microelectrode measurements of activity distribution in nitrifying bacterial aggregates, Appl. Environ. Microbiol., 59, 573-579.
  2. De Beer, D., Sweerts, J. P., van den Heuvel, J. C., 1991, Microelectrode measurement of ammonium profiles in freshwater sediments, FEMS Microbiol. Ecol. 86, 1-6. https://doi.org/10.1111/j.1574-6968.1991.tb04789.x
  3. Fikret, K., Ahmet, U., 2003, Nutrient loading rate effects on nutrient removal in a five-step sequencing batch reactor, Process Biochem., 39, 507-512. https://doi.org/10.1016/S0032-9592(03)00135-3
  4. Galveza, J., M., Gomeza, M. A., Hontoria, B. E., Gonzalez-Lopez, J., 2003, Influence of hydraulic loading and air flowrate on urban wastewater nitrogen removal with a submerged fixed-film reactor, Journal of Hazardous Materials, 219-229.
  5. Henze, M., 1991, Capabilities of biological nitrogen removal processes from wastewater, Wat. Sci. Technol., 23, 699-679.
  6. Jensen, K., Revsbech, N. P., Nielsen, L. P., 1993, Micro scale Distribution of Nitrification Activity in Sediment Determined with a Shielded Microsensor for Nitrate, Appl. Environ. Microbiol, 59, 3287-3296.
  7. Jin, L., 2001, Azo dye biodegradation and inhibition effects on aerobic nitrification and anoxic denitrification processes, doctorate of philosophy.
  8. Miller, A. J., 1995, Ion-Selective Microelectrodes for Measurement of Intracellular Ion Concentration, Methods in cell biology, 49, 275-291. https://doi.org/10.1016/S0091-679X(08)61460-0
  9. Park, T. J., Nam, H. U., Kim, Y. O., Lee, J. H., Hur, S. H., 2004, Automatic control of external carbon source addition for nitrogen removal in sewage with low C/N ratios, Wat. Sci. Technol., 49(5-6), 245-249.
  10. Richard, P. B., Erno, L., 1994, Recommendations for Nomenclature of Ion-selective Electrodes (IUPAC Recommendations 1994), Pure & Appl. Chem., 68(12), 2527-2536.
  11. Rustrian, E., Delgenes, J. P., Bernet, N., Moletta, R., 1999, Acidogenic activity: Process of carbon source generation for biological nutrient removal, Wat. Sci. Technol., 40(8), 25-32. https://doi.org/10.1016/S0273-1223(99)00605-8
  12. Sweerts, J. -P., de Beer, D., 1989, Microelectrode measurements of nitrate gradients in the littoral and profundal sediments of a meso- eutrophic lake (Lake Vechten, The Netherlands), Appl. Environ. Microbiol., 55, 754-757.