Study of Sorption Mechanisms of Heavy Metal Ions in their Individual and Combined Presence in Model Solutions
Adsorption treatment as an effective method of cleaning industrial wastewater from heavy metal ions is considered. Experimental studies on absorption of copper(II), iron(III), chromium(VI), aluminum(III) ions from model solutions on organic materials - peat and sawdust were carried out. Experiments were also carried out in the joint presence of copper and iron ions in the model solution, as they are often found in wastewater, in a ratio of 1:1. The optimum method of spectrographic determination in the combined presence of the above ions was also selected. Based on the experimental studies, adsorption isotherms were constructed and the analysis of the obtained isotherms using different models, the approximation coefficient was chosen as the criterion of consistency. It is shown that according to the proposed models it is impossible to describe the adsorption process by one of the models for one sorbent, the sorption of each heavy metal ion is described by its own model.