Abstract
Hydrogen titanates (H-titanates) of different nanostructures (nanotubes, nanowires, nanosheets) have been synthesized by hydrothermal methods. The europium (III) sorption from aqueous solutions onto nano-sized H-titanates was studied as a function of contact time, pH values, and initial Eu (III) concentration in batch experiments. Reversibility of adsorption of europium has been investigated as well. Nano-sized H-titanates can be used for tri-valent f-elements removal in polluted water treatment due to fast and efficient sorption of Eu (III).
Highlights
The development of nuclear energy results in increasing discharge of radionuclides in natural environments due to accidents in nuclear power or reprocessing plants [1]
Americium and curium present only in trivalent form under environmental conditions and their chemical behavior is very close to lanthanides, Eu (III)
In this work we have investigated the sorption of europium (III), as an analogue of An (III), onto nano-sized H-titanates with different structures
Summary
The development of nuclear energy results in increasing discharge of radionuclides in natural environments due to accidents in nuclear power or reprocessing plants [1]. Actinides and lanthanides are formed in spent nuclear fuel (SNF) and radioactive waste (RW). Storage and reprocessing of SNF and RW can release these elements, as well as other components, into the natural water and soil environment. Transplutonium actinides (mainly, Am and Cm) and lanthanides formed in nuclear fuel during its operation are important hazardous elements due to their high toxicity and radioactivity. It is very important to develop materials and methods for their effective removal from wastewater and groundwater. Different techniques of An (III)/Ln (III) extraction from water solutions have been developed using inorganic sorbents [2–11], organic/polymer sorbents [12–15], and different types of chromatography [16–18].
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