Measurement of Complex Formation Process of Lead (II) with Fulvic Acids at pH= 8

Authors

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

DOI:

https://doi.org/10.9734/bpi/ctcb/v1/2237B

Keywords:

Lead fulvate, stability constant, fulvic acids

Abstract

The present work aims to investigate the complex formation process between the pure samples of FA, isolated from natural waters   and Pb and to calculate the average stability constant of lead fulvate complex.   

Complex formation process between Pb (II) and fulvic acids was studied by the solubility method at pH=8.0. The suspension of Pb(OH)2 was used as a solid phase. Fulvic acids were isolated from Paravani lake by the adsorption–chromatographic method. During the calculation of molar concentrations of fulvic acids, was taking into consideration the value of average molecular weight   of fulvic acids at pH=8 (Mw=6260).

It was established, that in the Pb(OH)2(solid) —Pb(II)(solution) —FA—H2O system at pH=8.0,dominates the lead dihydroxy fulvate complex with the structure 1:1,which average stability constant \(\beta\)(Pb(OH)2FA) = 9,63x106  , lg \(\beta\)=6,98.

Published

2022-04-15

How to Cite

Tamar Makharadze. (2022). Measurement of Complex Formation Process of Lead (II) with Fulvic Acids at pH= 8 . Current Topics on Chemistry and Biochemistry Vol. 1, 148–154. https://doi.org/10.9734/bpi/ctcb/v1/2237B

Issue

Current Topics on Chemistry and Biochemistry Vol. 1

Section

Chapters