Measurement of Complex Formation Process of Lead (II) with Fulvic Acids at pH= 8 | Chapter 10 | Current Topics on Chemistry and Biochemistry Vol. 1

 The goal of this study is to look into the complex formation process between pure FA samples isolated from natural waters and Pb, as well as to determine the average stability constant of the lead fulvate complex.

The solubility method was used to investigate the complex formation process between Pb (II) and fulvic acids at pH=8.0. As a solid phase, a Pb(OH)2 suspension was utilised. The adsorption–chromatographic approach was used to separate fulvic acids from Paravani Lake. The value of average molecular weight of fulvic acids at pH=8 (Mw=6260) was taken into account while calculating molar concentrations of fulvic acids.

The lead dihydroxy fulvate complex with the structure 1:1 dominates the Pb(OH)2(solid) —Pb(II)(solution) —FA—H2O system at pH=8.0, with an average stability constant (Pb(OH)2FA) = 9,63x106, lg =6,98.

Author(S) Details

Tamar Makharadze
Ivane Javakhishvili Tbilisi State University, R. Agladze Institute of Inorganic Chemistry and Electrochemistry,11 Mindeli Street,0186, Tbilisi, Georgia.

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