Shunkov V. Effective and selective sorption materials for the extraction of environmentally hazardous ions from aqueous media

The thesis is devoted to solving the important environmental problem - the scientific substantiation choice of effective inorganic sorbents for the purification of aqueous environments from environmentally hazardous ions - radionuclides 137Cs, 90Sr, U(VI), heavy toxic metals - Cu(II), Cd(II), Co(II), Ni(II), and phosphate ions. It has been established that the magnetic composite - potassiumzinchexacyanoferrate (II) and magnetite are highly effective sorption materials, with magnetic properties for purification of multicomponent contaminated aqueous media of different mineralization from radionuclides and heavy metals with the use of magnetic separation, and the possibility of complete automation of the technological process. The carbonate and especially high-efficien thermally treated forms (Zn/Al and Mg/Fe)-ions: of layered double-hydroxides (LDH) with a ratio of [Mg(II)]/[Fe(III)] of 2:1 and 3:1 for the purification of aqueous media from phosphate ions are proposed, the maximum degree - (99,6-99,8) %, which is achieved already at a dose of calcified forms Mg/Fe-LDH 2 g/dm3. Such sorbents are also highly selective: hydrocarbonate-, chloride- and sulfate- ions, characteristic for both natural and sewage media, practically have no effect on the sorption removal of phosphate ions.