ABSTRACT

Fulvic acids were separated from the water of the river by the adsorption- chromotographic method. The charcoal was used as a sorbent. The complex formation process of fulvate complexes of copper were studied by using sephadex G-25 on different values of pH. The parameters of sephadex G-25: the mass of dry gel – 17 g, the height of swelled layer of gel – 42 sm, the inner diameter of column – 16 sm. It was calculated the average meanings of the conditional stability constants of fulvate complexes of copper. It was established that β pH9 ≈ β pH8 > β pH6 > β pH5 $ {{\beta }}\left( {\text{pH9}} \right) \, \approx {{\beta }}\left( {\text{pH8}} \right){{ > \beta }}\left( {\text{pH6}} \right){{ > \beta }}\left( {\text{pH5}} \right) $ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315365985/93067212-2742-4adb-9a79-69b21685310d/content/inline-math1.tif"/> .