Abstract
To evaluate the capability of pyrophosphate ion as a carrier of fertilizer trace elements, pyrophosphato complexes with manganous, cupric, ferrous and zinc ions were studied by spectrophotometry and polarography.
The soluble complexes of Mn2+ Cu2+, Fe2+ and Zn2+ with pyrophosphate ion appeared to be [Mn (Hx P2O7)2)(6-2x)-, [Cu(HxP2O7)2](6-2x)-, [Fe(HxP2O7)2](6-2x)- and [ZnHxP2O7](2-x)-, and the logarithmic values of their stability constants were measured to be 1.79, 3.45, 5.08 and 6.43 at pH 10, respectively.
However, by adding excess corresponding metal ion, the soluble pyrophosphato complexes were ultimately changed to amorphous precipitates.
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Abbreviations
- CL :
-
concentration of pyrophosphate ion ligand (mole//)
- δE(1/2):
-
difference in half-wave potential between simple metal ion and complex (volt)
- K:
-
stability constant of complex
- n:
-
valence of metal ion
- r:
-
molar ratio of pyrophosphate ion/metal ion in complex
References
Ellis, B.G., Davis, J.F., and Judy, W.H.:Soil Sci. Soc. Amer. Proc.,29, 635 (1965).
Frazier, A.W., Smith, J.P., and Lehr, J.R.:J. Agr. Food Chem.,14(5), 522 (1966).
Richards, G.E.:Farm Chemicals,132, 43 (1969).
Metcalf, J.R.:Ind. Water Eng.,8(1), 16 (1971).
Baure, D.J. and Lindstrom, R.E.:J. Metals,23(5), 31 (1971).
Shen, C.Y.:Ind. Eng. Chem. Prod. Res. Dev.,20(1), 144(1981).
Mortvedt, J..J. and Osborn, G.:Soil Sci. Soc. Am. J.,41, 1004(1977).
Frazier, A.W. and Dillard, E.F.:J. Agric. Food Chem.,29(4), 695(1981).
Gilkes, R.J. and Sadleir, S.B.:Soil Sci. Soc. Am. J.,45, 813(1981).
Mann, H.C., McGill, K.E., and Jones, T.M.:Ind. Eng. Chem. Prod. Res. Dev.,21(3), 488 (1982).
Lewis, H.T., Jones, T.M., and Burnell, J.R.:Ind. Eng. Chem. Prod. Res. Dev.,22(1), 111 (1983).
Conley, R.F.:J. Paint Technol.,46(594), 51 (1974).
Scott, J.E.: US Patent,4, 089,651 (1978).
Koudelka, M., Sanchez, J., and Augustynski, J.:J. Electrochem. Soc.,129(6), 1186 (1982).
Van Wazer, J.R. and Campanell, D.A.:J. Am. Chem. Soc.,77, 655 (1955).
Watters, J.I., Lambert, S.M., and Loughran, E.D.:J. Am. Chem. Soc.,79, 3651 (1957).
Lambert, S.M. and Watters, J.I.:J. Am. Chem. Soc.,79, 4262 (1957).
Roppongi, A. and Kato, T.:Bull. Chem. Soc. Jpn.,35(7), 1086 (1962).
Van Wazer, J.R. and Campanell, D.A.:J. Am. Chem. Soc.,72, 655 (1950).
Watters, J.I. and Loughran, E.D.:J. Am. Chem. Soc.,75, 4819 (1953).
Aoki, S. and Arai, Y. :Nippon Kagaku Kaishi, No. 1,60 (1974).
Greenfield, S. and Clift, M.: “Analytical Chemistry of the Condensed Phosphates”, 1st Ed., P. 33, Pergamon Press, New York (1975).
Lambert, S.M. and Watters, J.I.:J. Am. Chem. Soc.,79, 5606 (1957).
Watters, J.I. and Aaron, A.:J. Am. Chem. Soc.,75, 611 (1953).
Deford, D.D. and Hume, D.N.:J. Am. Chem. Soc.,73, 5321 (1951).
Bard, A.J. and Faulkner, L.R. : “Electrochemical Methods: Fundamentals and Applications”, 1st Ed., P. 194, John Wiley & Sons (1980).
Lingane, J.J.:Chem. Rev.,29, 1 (1941).
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Lee, J.I., Kwon, L.M. A study on pyrophosphato complexes with fertilizer trace elements. Korean J. Chem. Eng. 6, 1–6 (1989). https://doi.org/10.1007/BF02698104
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DOI: https://doi.org/10.1007/BF02698104