Sorption of cobalt, chromium and uranium ions on Fe/Ti-pillared montmorillonite
DOI:
https://doi.org/10.15587/1729-4061.2014.26246Keywords:
pillared montmorillonite, adsorption, polyhydroxocomplex, porous structure, modification, cobalt, chromium, uraniumAbstract
The structural and adsorption properties of montmorillonite pillared with titanium and iron polyhydroxocomplexes are given in the paper. It was found that the composition of the polyhydroxocomplexes significantly affects the properties of the resultant materials. For studying the basic properties of the resultant materials, the X-ray phase analysis, the low-temperature nitrogen adsorption, and adsorption of the metal ions from aqueous solutions were used.
The results of the X-ray phase analysis, with changes in the respective basal reflections, confirm the presence of iron and titanium polyhydroxocomplexes in the interlayer space of the mineral. Synthesized pillared minerals have a well-developed specific surface, micro- and mesoporosity, as confirmed by the low-temperature nitrogen adsorption.
It was found that the pillared montmorillonite shows relatively high adsorption characteristics relatively to chromium and uranium ions. Adsorption on the pillared montmorillonite samples significantly depends on the pH solutions, adsorptive properties and the composition of the polyhydroxocomplexes, which were used for synthesizing adsorbents.
The research results can be useful for developing and synthesizing new types of inorganic ion-exchange materials for extracting cations and anions of various inorganic toxicants from aqueous solutions.
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Copyright (c) 2014 Ігор Володимирович Пилипенко, Ірина Андріївна Ковальчук, Василь Валерійович Веремеєнко, Лариса Миколаївна Спасьонова
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