A STUDY ON KINETICS OF LEAD, ZINC, IRON, COPPER AND NICKEL SORPTION ONTO IMMOBILIZED HUMIC SUBSTANCES

Kinetics of interaction between humic substances (HS) and metal ions are very significant in determining their reactivity in the nature, for instance, the size of humic substance may notably affect the kinetics of metal binding. Kinetics of complex formation is likely a significant process, that determines the transport of organic and inorganic pollutants in nature. Present paper investigates the kinetics of zinc, lead, iron, nickel and copper sorption onto immobilized humic substances. Immobilized humic substances and their sorption capacity of metal ions were characterized using multi-proxy analysis, including elemental analysis, Fourier transform infrared spectroscopy (FTIR), scanning electr on microscopy (SEM), atomic absorption spectroscopy (AAS). A batch sorption was applied to study the sorption of Zn, Cu, Ni, Pb and Fe onto immobilized humic substances. Various parameters affecting the sorption capacity such as initial pH, agitation period, temperatures and different initial concentrations of metals, as well humic substances were studied. The obtained results showed that sorption of studied metals is efficient, and affordable technology for simultaneous removal of trace elements from the contaminated territories, using immobilized humic substances.