Use of the cation exchange equilibrium method for the determination of stability constants of Co(II) with soil humic and fulvic acids |
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| Authors: | J. Z. Du W. J. Li H. Q. Zhang X. D. Wang Z. J. You C. Y. Zhou W. M. Dong Z. Y. Tao |
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| Affiliation: | (1) Radiochemistry Laboratory, College of Chemistry and Chemical Engineering, Lanzhou University, 730000 Lanzhou, P. R. China;(2) China Institute for Radiation Protection, 030006 Taiyuan, P. R. China |
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| Abstract: | The stability constants for tracer concentrations of Co(II) complexes with both the red earth humic and fulvic acids were determined at pH 5.9 and ionic strength 0.010 mol/l by using theArdakani-Stevenson cation exchange equilibrium method and the radiotracer60Co. It was found that the 1:1 complexes of Co(II) with the red earth humic and fulvic acids were formed and that the average values of logβ (stability constant) of humic and fulvic acid complexes were 5.76±0.19 and 4.42±0.03, respectively. |
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