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Open AccessArticle

Structural, Mineral and Elemental Composition Features of Iron-Rich Saponite Clay from Tashkiv Deposit (Ukraine)

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RIOT Technologies Ltd., 50 B Czarnowiejska Str., Cracow 30-054, Poland
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Department of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, 7 Gagarina Str., Torun 87-100, Poland
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Department of Chemistry, Faculty of Technology Engineering, Khmelnitsky National University, 11 Instytutska Str., Khmelnitsky 29016, Ukraine
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Department of Analytical Chemistry, Faculty of Chemistry, Taras Shevchenko National University of Kyiv, 60 Volodymyrska Str., Kyiv 01601, Ukrain
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Authors to whom correspondence should be addressed.
Colloids Interfaces 2019, 3(1), 10; https://doi.org/10.3390/colloids3010010
Received: 8 December 2018 / Revised: 8 January 2019 / Accepted: 9 January 2019 / Published: 13 January 2019
Low-temperature nitrogen adsorption–desorption isotherms, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, as well as infrared spectroscopy were used to characterize structural features of raw and acid-treated saponite from Tashkiv deposit of Ukraine. It was determined that raw saponite is predominantly composed of trioctahedral saponite with an admixture of dioctahedral nontronite and associated minerals such as quartz, hematite, and anatase. Raw saponite clay was characterized by a high content of iron (19.3%) and titanium (1.1%). Iron is present in the form of hematite particles, isomorphic replacements in octahedral and tetrahedral sheets of a clay structure, or as a charge-balancing cation in the interlayer space. Titanium is homogeneously dispersed as submicrometer anatase particles. The porous structure of both saponite forms consists of micro-meso porous system with narrow slit mesopores dominating. As a consequence of the acid treatment, the specific surface area increased from 47 to 189 m2 g−1, the total pore volume from 0.134 to 0.201 cm3 g−1, and the volume of the micropores increased sevenfold. Using the data of our research allowed us to utilize these mineral resources wisely and to process saponite more efficiently. View Full-Text
Keywords: saponite; acid treatment; morphology; nanocrystallite structure; porous structure saponite; acid treatment; morphology; nanocrystallite structure; porous structure
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Sokol, H.; Sprynskyy, M.; Ganzyuk, A.; Raks, V.; Buszewski, B. Structural, Mineral and Elemental Composition Features of Iron-Rich Saponite Clay from Tashkiv Deposit (Ukraine). Colloids Interfaces 2019, 3, 10.

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