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Information × Registration Number 0211U005907, 0111U008216 , R & D reports Title MONO-AND BIFUNCTIONAL PHOSPHORCONTAINING SILICA FOR SELECTIVE REMOVAL IONS OF HEAVY, RARE-EARTH AND RADIOACTIVE METALS FROM ENVIRONMENT popup.stage_title Head Dudarko Oksana Anatoliyivna, Registration Date 15-12-2011 Organization Institute of Surface Chemistry of the National Academy of Sciences of Ukraine popup.description2 According to developed and improved methods the mesoporous silica samples of SBA-15 type were obtained , that can be used as sorbents based on physic-chemical studies, because the relatively high content of functional groups in the surface layer and developed porous structure will ensure efficient extraction of rare earth ions and radioactive metals from aqueous solutions. It was found that phosphorus-containing mesoporous silica obtained by template method, have high absorption characteristics with respect to uranium and thorium ions. The highest rates are observed in the sorption by the sample 1POH that capacity for uranium and thorium more than 127 and 122 mg / g, respectively. From the value of the limiting sorption capacity for uranium by the sample 2POH less than the cation exchanger S-957 made by "Purolite", but it more exceeds it by such parameters as the limiting distribution coefficient (Kd) and the exchange constant (Kobm), indicating a higher selectivity to uranium phosphate mesoporous silicas. All investigated sorbents sorb little americium ions from highly acidic nitrate solutions. This suggests the possibility of using mesoporous silicas for the separation of phosphate ions of trivalent and tetravalent actinides in acidic media. Product Description popup.authors Слєсаренко Валерія Василівна popup.nrat_date 2020-04-02 Close