Humic Acids: Interaction with Metal Ions, Features of Structure and Properties of Metal Humic Complexes

The mechanism of processes involved in the interaction of humic acids with heavy metal ions, as well as the features of structure and properties of metal humic complexes (MHC) are investigated with the help of EPR spectroscopy and TGA. The topography of distribution of functional groups on the surface of the powders of humic acids and MHC is investigated by means of adsorption of acid-base indicators. The stability of MHC in aqueous medium and the mobility of heavy metals are studied with the help of HCl leaching method.