Finding the Reaction Constant Between Humic Acid and Metal Ions by Fluorescence Quenching Effect

  • Authors

    • Wen Po Cheng
    • Yi Tsang Lu
    • Ruey Fang Yu
    • Xin Ru Lin
    • Han Xin Li
    2018-08-26
    https://doi.org/10.14419/ijet.v7i3.32.18379
  • Humic acid, Fluorescence quenching effect, Complex reaction, Titration.

  • Humic acid was used as the removal target for evaluating the coagulation efficiency in this study. When the metal ions mix with humic acid solution, a Fluorescence quenching effect may be observed conditionally. This effect can be described by Stern-Volmer linear equation which can be used for quantifying the quenching constant (KQ) of the Fluorescence quenching effect. In addition, the result of the quenching constant (KQ) was used to explain the electron-neutralization capability of the metal ions at different pH. The results indicated that there is no significant Fluorescence quenching effect between the additions of monovalent Na+ ion, divalent Ca2+ and humic acid. Otherwise, when pH of the FeCl3 solution was between 4.5 and 5.5, fluorescence quenching effect obviously occurred. The maximum KQ value was found to be 305,990 at pH 5. It means that the higher KQ value is, the better complex reaction between humic acid and aluminum salts will be. Through the KQ value study, the optimum pH can be quantified when humic acid solution is reacted with ferric ion.

     

  • References

    1. [1] R. Sudoh, Md. S. Islam, K. Sazawa, T. Okazaki, N. Hata, S. Taguchi, H. Kuramitz, Removal of dissolved humic acid from water by coagulation method using polyaluminum chloride (PAC) with calcium carbonate asneutralizer and coagulant aid, Journal of Environmental Chemical Engineering, 3(2) (2015), pp. 770–774.

      [2] M.I. Velasco, P. A. Campitelli, S.B. Ceppi, J. Havel, Analysis of humic acid from compost of urban wastes and soil by fluorescence spectroscopy, Agriscientia, 21(1) (2004), pp.31-38.

      [3] M. Z. Bieroza, J. Bridgeman, A. Baker, Fluorescence spectroscopy as a tool for determination of organic matter removal efficiency at water treatment works, Drink. Water Eng. Sci., 3 (2010), pp. 63–70.

      [4] Y. Shutova, A. Baker, J. Bridgeman, R. K. Henderson, On-line monitoring of organic matter concentrations and character in drinking water treatment systems using fluorescence spectroscopy, Environmental Science: Water Research & Technology, 2(4) (2016), pp. 749-760.

      [5] M. Heibati, C. A.Stedmon, K. Stenroth, S. Rauch, J.Toljander, M.Säve-Söderbergh, K. R.Murphy, Assessment of drinking water quality at the tap using fluorescence spectroscopy, Water Research, 125(15) (2017), pp. 1-10

      [6] M. Klavins, L. Ansone, Study of interaction between humic acids and fullerene c60 using fluorescence quenching approach, Ecological Chemistry and Engineering, 17(3) (2010), pp.351-362.

      [7] D. Forcha, K. J. Brown, Z. Assefa, Luminescence, absorption, and Stern–Volmer studies of cerium chloride and nitrate compounds in acidic and neutral aqueous, and non-aqueous solutions, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 103 (2013), pp. 90–95.

      [8] T. D. Gauthier, E. C. Shane, W. F. Guerin, W. R. Seitz, C. L. Grant Fluorescence quenching method for determining equilibrium constants for polycyclic aromatic hydrocarbons binding to dissolved humic materials, Environ. Sci. Technol., 20 (11) (1986), pp 1162–1166.

      [9] B. Pan, B. Xing, W. Liu , G. Xing , S. Tao, Investigating interactions of phenanthrene with dissolved organic matter: Limitations of Stern–Volmer plot, Chemosphere, 69 (2007), 1555–1562.

      [10] K. Nakashima, S. Xing, Y. Gong, T. Miyajima, Characterization of humic acids by two-dimensional correlation fluorescence spectroscopy, Journal of Molecular Structure, 883–884 (2008), pp.155–159.

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    Po Cheng, W., Tsang Lu, Y., Fang Yu, R., Ru Lin, X., & Xin Li, H. (2018). Finding the Reaction Constant Between Humic Acid and Metal Ions by Fluorescence Quenching Effect. International Journal of Engineering & Technology, 7(3.32), 4-6. https://doi.org/10.14419/ijet.v7i3.32.18379