Investigation of Complex Formation Process of Lead with Fulvic Acids by the Solubility Method

Author: sesili rogava
Keywords: fulvic acids, stability constants, solubility method.
Annotation:

Geopolymers, fulvic acids have functional groups and that is why they take an active part in complex formation processes proceeding in natural waters,bottom sediments and soils. Fulvic acids form stable complexes with heavy metals and radionuclides and stipulate their migration forms in natural objects. The data about stability constants of fulvate complexes differ in several lines from each other. This condition is mainly stipulated by the ignoring the dependence of average molecular weights (Mw) of FA on the value of pH, which finally causes the wrong results. Our objective was to determine composition and the values of stability constants of lead fulvate complex at pH=9.0, because such data are not found in literature. Pure samples of fulvic acids were isolated from Paliastomi Lake by the adsorption-chromatographic method. The complex formation process was studied by the solubility method. The values of stability constants () of lead dihydroxy fulvate complex were determined according to “oligomer “ and “active associate”.

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ფულვომჟავებთან, ტყვის კომპლექსწარმოქმნის შესწავლა ,ხსნადობის მეთოდით [ka]