Sorption of phosphate anions by polymeric sorbents impregnated with ferric oxides
Polymeric cation exchangers, when loaded with Fe+ 3 ions, as well as neutral hypercrosslinked polystyrene-type composite materials containing nanodispersed hydrated iron oxides, acquire the ability of selectively removing phosphate anions from aqueous salt solutions serving as models for plasma electrolytes. From a series of functionalized polymers, most advantageous are ion exchangers with chelating functional groups. Nanocomposite materials derived from hypercrosslinked polystyrene sorbents, though yield in adsorption capacity, but are more convenient and, which is most important, are highly hemocompatible.