Kinetic and static parameters of a new sorbent based on clays and ways of its determination

The paper demonstrates experimental research results obtained while studying heavy metal ions sorption ability. These ions were extracted from a multicomponent model solution. The research was conducted for a new sorption sample based on clays under static conditions and carried out in the range of low concentrations of heavy metal ions in the solution. For the development of sorption isotherms, the method of non-variant test portions and variable concentrations of heavy metal ions was used. As a result, the researchers constructed sorption isotherms for copper, zinc, manganese, iron and lead. The experimental data was approximated by the Freundlich, Langmuir, Langmuir-Freundlich, Toch and Redlich-Peterson equations. MathCAD and SciDAVis software programs were used for mathematical processing. The authors came to the conclusion that the Langmuir equation most adequately described the sorption isotherms for copper, lead and zinc, the Toch model was preferable for iron and manganese isotherms. During the experiment, sorption constants and determination coefficient were also determined for each metal.