Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Comparison of the Stability Constants of Cd(II)-, Cu(II)-, and Pb(II)-Humate Complexes

  • Choi, Se-Young (Department of Chemistry, Korea Advanced Institute of Science & Technology) ;
  • Moon, Hi-Chung (Department of Chemistry, Korea Advanced Institute of Science & Technology) ;
  • Jun, Song-Hui (Department of Chemistry, Korea Advanced Institute of Science & Technology) ;
  • Chung, Kun-Ho (Department of Chemistry, Korea Advanced Institute of Science & Technology)
  • Published : 1994.07.20
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Abstract

A comparative investigation of the complexations of divalent metal ions (Cd, Cu, and Pb) by a well characterized soil humic acid (HA) from Okchun Metamorphic Belt was carried out in 0.05 M $KNO_3$ and pH of 4.5 using ion selective electrodes. A continuous distribution model based on the Scatchard Plot was used to determine the stability constants, because the constants obtained by this modeling technique takes the variations in binding energies into consideration without regards to the manner in which M(II) ion is bound on HA. The mean value of log $K_i$ were $4.05{\pm}0.60,\;4.92{\pm}0.36,\;and\;5.63{\pm}0.34\;{\ell}\;mol^{-1}$ for Cd(II)-, Pb(II), and Cu(II)-humate complexes respectively. The values of intrinsic constant (log $K_{int}$; binding at strongest site) were $7.12{\pm}0.30,\;6.59{\pm}0.32,\;and5.07{\pm}0.56\;{\ell}\; mol^{-1}$ in the order Cu(II) > Pb(II) > Cd(II) ion.

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References

  1. ICCET Series E no.No. 1 Moon, H.;Thornton, I.
  2. Geochim. Cosmochim Acta v.44 Saar, R. T.;Weber, J. H.
  3. Water Res. v.18 Sterritt, R. M.;Lester, J. N.
  4. Geochim. Cosmochim Acta v.54 Buffle, J.;Altmann, R. S.;Filella, M.;Tessier, A.
  5. Soil Sci. v.155 Stevenson, F. J.;Fitch, A.;Brar, M. S.
  6. Bull. Korean Chem. Soc. v.14 Lee, M. H.;Choi, S. Y.;Chung, K. H.;Moon, H.
  7. Soil Sci. v.123 Stevenson, F. J.
  8. Sci. Total Environ. v.64 Linder, P. W.;Murray, K.
  9. Soil Sci. Soc. Am. J. v.48 Fitch, A.;Stevenson, F. J.
  10. Geochim. Cosmochim. Acta v.48 Perdue, E. M.;Reuter, J. H.;Parrish, R. S.
  11. Anal. Chem. v.62 Susetyo, W.;Dobbs, J. C.;Carreira L. A.;Azarraga, L. V.;Grimm, D. M.
  12. Humic substances in soil, sediment, and water Aiken, G. R.;McKnight, D. M.;Wershaw, R. L.;MacCarthy, P.(Eds)
  13. Master Thesis, Korea Advanced Institute of Science and Technology Shin, H. S.
  14. Soil. Sci. Soc. Am. J. v.55 Stevenson, F. J.;Chen, J.
  15. Aquatic and terrestrial humic materials Perdue, L. M.;Lytle, C. R.
  16. Bull. Korean Chem. Soc. v.14 Lee, M. H.;Choi, S. Y.;Moon, H.
  17. Environ. Toxicol Chem. v.5 Giesy, J. P.;Albert, J. J.;Evans, D. W.

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