Adsorption of Zn2+, Cd2+, and Pb2+ cations by nanocomposites based on single-domain magnetite
DOI:
https://doi.org/10.15407/dopovidi2015.12.090Keywords:
adsorption, biocompatible coatings, magnetite, magnetosensitive nanocomposites, metal cations, surface modificationAbstract
Magnetosensitive nanocomposites Fe3O4/SiO2, Fe3O4/TiO2, Fe3O4/Al2O3 based on single-domain magnetite are synthesized. The dependence of adsorption properties of nanocomposites on the chemical nature of their surface is revealed. The isotherms and the kinetics of adsorption of Zn2+, Cd2+, and Pb2+ cations and their mixtures from aqueous solutions are studied in a pH interval of 4.5–10.0. The nanocomposites had high biocompatibility, the extraction extent of the ions was 95–99%. The highest adsorption parameters for all the studied ions are demonstrated for Fe3O4/TiO2 nanostructures. The conclusion is drawn on prospects of the synthesized nanocomposites for the creation of adsorbents for medico-biological, technical, and ecological destinations.
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