Synthesis of composite sorbent for removing heavy metal ions from wastewater
DOI:
https://doi.org/10.15587/1729-4061.2015.46497Keywords:
sorption in column, KU-2-8, thiocarbamide, heavy metal ions, modification, difrogrammetric analysisAbstract
Sedimentation of heavy metal ions, low, but environmentally relevant concentrations of heavy metals in water bodies has become one of the most dangerous problems worldwide. One of the known sources of this type of pollution is wastewater from nuclear and thermal power plants. According to national and international environmental standards, the composition of such water no longer allows the use of traditional purification methods. This dictates the need to develop a composite sorbent for modern purification systems.
A method for the synthesis and modification of the composite sorbent based on the KU-2-8 ionite was developed. The synthesis was carried out by deposition of synthetic magnetite Fe3O4 in pure form on its surface and in the presence of thiocarbamide. Sorption properties of materials were studied in dynamic conditions when extracting Cu (II) ions from water. Thomas model, linking the amount of the solution passed with a concentration of the substance sorbed on the column outlet was built. Under the terms of the Thomas model, the correspondence of experimental data to the calculated values confirms mainly physical sorption in the monolayer (Langmuir model), and the extraction of copper ions is described by the pseudo-second-order kinetic equation.
Difrogrammetric analysis of the relative distribution of copper, iron and sulfur in the sorbent structure has shown that copper ions are extracted from the solution by the entire amount of grain of the composite material.
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