Adsorption and Physicochemical Properties of Natural Montmorillonites and Their Modified Forms

Rakyts’ka, T. L.; Kiose, T. A.; Dzhyga, G. M.

doi:10.18524/2304-0947.2017.1(61).94710

Cited by 2 publications

(1 citation statement)

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“…Those kinds of treatment result in changes in the structural-adsorption parameters and the physicochemical properties of supports, particularly in their water vapor adsorption capacities. These changes are well-examined in supports such as clinoptilolites and bentonites [21,22], however they are quite unexplored in the case of tripolis. Natural tripolis of different origins differ in their phase compositions and main phase ratios, and these parameters undoubtedly would change in their modified forms.…”

Section: Introductionmentioning

confidence: 99%

Effect of Both the Phase Composition and Modification Methods on Structural-Adsorption Parameters of Dispersed Silicas

Rakitskaya

Kiose

Golubchik

et al. 2018

Colloids and Interfaces

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Tripoli from two Ukrainian deposits was studied in its natural and modified forms. The investigation of natural and modified tripoli involves the identification of their phase compositions through X-ray diffraction and the analysis of their water vapor adsorption-desorption isotherms. The obtained results are evidence of changes in the structural-adsorption parameters of tripoli as a result of modification. Their treatment in boiling water or acid causes apparent alterations of contents of the main phases and sizes of their crystallites, whereas their calcination causes not only the dehydroxylation of surfaces and the agglomeration of phases, but even phase transformation in the case of carbonate tripoli. After analyzing water vapor adsorption-desorption isotherms of natural and modified tripolis, some correlations between their adsorption parameters, phase compositions, main phase contents and crystallite sizes have been found.

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Section: Introductionmentioning

confidence: 99%