Controlled reprocessing of leucoxene concentrate for environmental friendly production of titanosilicate – An effective sorbent for strontium and cesium ions

Perovskiy, Igor A.; Shushkov, Dmitry A.; Ponaryadov, Alexey V.; Panikorovskii, Taras L.; Krivoshapkin, Pavel V.

doi:10.1016/j.jece.2023.110691

Cited by 11 publications

(1 citation statement)

References 74 publications

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“…Это не позволяет рассматривать предложенный фтоаммонийный способ обогащения концентратов как комплексный. Решением проблемы является получение гидратированного осадка заданного состава из маточных растворов, полученных при фторировании исходного немеханокативированного концентрата (Perovskiy, 2023). Предложенный в работе подход позволяет управлять составом гидратированного осадка за счет контроля рН маточного раствора.…”

Section: благодарностиunclassified

Трансформационные Минералы Кольской Щелочной Провинции

Паникоровский,

Яковенчук,

Базай

et al. 2023

Щелочной И Кимберлитовый Магматизм Земли И Связанные С Ним Месторождения Стратегических Металлов И Алмазов.

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Организационный комитет международной научной конференции "Щелочной и кимберлитовый магматизм земли и связанные с ним месторождения стратегических металлов и алмазов" Председатель •академик РАН Кривовичев Сергей Владимирович (ФИЦ КНЦ РАН, г. Апатиты) Сопредседатели •академик РАН Когарко Лия Николаевна (ГЕОХИ РАН, г. Москва) •д.г.-м.н. Козлов Николай Евгеньевич (ГИ КНЦ РАН, г. Апатиты

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Section: благодарностиunclassified

Трансформационные Минералы Кольской Щелочной Провинции

Паникоровский,

Яковенчук,

Базай

et al. 2023

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Effect of mineralizer and synthesis duration on sorption properties of sitinakite and ivanyukite

Perovskiy,

Panikorovskii,

Shushkov

2024

Vestnik of Geosciences

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Titanosilicates with the structure of sitinakite and ivanyukite were synthesized with the use of enrichment wastes of quartz-leucoxene concentrate (Yarega deposit, Komi Republic) by autoclave method. It was found that using a mixture of mineralizer KOH and NaOH at a concentration of 0.15 and 1 mol/l, K-Na sitinakite was formed. Increasing the concentration of KOH to 0.45 mol/L and decreasing NaOH to 0.7 mol/L led to crystallization of ivanyukite. The obtained titanosilicates are characterized by high sorption activity towards Sr2+ and Cs+ cations. Sorption capacity of K-Na sitinakite and ivanyukite for Sr2+ was 95–110 and 102–114 mg/g, respectively. The Cs+ sorption capacity for K-Na sitinakite is 240 mg/g, the sorption capacity for ivanyukite is much higher — 370–380 mg/g. It was shown that the differences in the sorption capacity of K-Na sitinakite and ivanyukite are caused by the features of the crystal structure.

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Mineral Mimetic Material Sr-Exchanged Sitinakite of Different Crystallinity: Phase Transformations during Heat Treatment and the Strength of SR Fixation in a Ceramic Matrix

Perovskiy,

Shushkov,

Ponaryadov

et al. 2024

Materials

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A simple method for the direct transformation of Sr-exchanged titanosilicate with the sitinakite structure (IONSIV) into ceramic material through cold pressing and subsequent sintering at 1100 °C for 4 h is presented. The temperature transformation of Sr-exchanged sitinakite showed the stages of recrystallization of the material with the formation of Sr-Ti phases matsubaraite (Sr4Ti5[Si2O7]2O8), jeppeite (SrTi6O13), tausonite (SrTiO3), and rutile. Leaching experiments showed the efficiency of fixation of Sr cations in a ceramic matrix; extraction into water does not exceed 0.01% and desorption in 1 M HNO3 solution is only 0.19% within three days. The leaching rates of immobilized Sr demonstrate the structural integrity of the formed phases in the ceramic (2.8 × 10−5–1.0 × 10−5 g/(m2·day). The decrease in the crystallinity of the initial Na-sitinakite, which is achieved by reducing the synthesis temperature from 250 to 210 °C, does not affect the sorption capacity and the fixation of cations in the ceramic matrix. The obtained results confirm the prospect of using inexpensive precursors, titanium ore enrichment waste, for the synthesis of sorption materials.

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Controlled reprocessing of leucoxene concentrate for environmental friendly production of titanosilicate – An effective sorbent for strontium and cesium ions

Cited by 11 publications

References 74 publications

Трансформационные Минералы Кольской Щелочной Провинции

Трансформационные Минералы Кольской Щелочной Провинции

Effect of mineralizer and synthesis duration on sorption properties of sitinakite and ivanyukite

Mineral Mimetic Material Sr-Exchanged Sitinakite of Different Crystallinity: Phase Transformations during Heat Treatment and the Strength of SR Fixation in a Ceramic Matrix

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