Kravchenko M. Zirconium and magnesium granulated silicate sorbents for the removal of heavy metal ions.

Українська версія

Thesis for the degree of Candidate of Sciences (CSc)

State registration number

0425U000206

Thesis Registration Form

0425U000206.pdf

Applicant for

Specialization

  • 02.00.04 - Фізична хімія

26-05-2025

Specialized Academic Board

Д 26.210.01

Chuiko Institute of Surface Chemistry of NAS of Ukraine

Essay

Thesis for the degree of the Candidate of sciences in Chemistry in specialty 02.00.04 – Physical chemistry. – Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, Kyiv, 2025. The dissertation is devoted to a relevant topic — the design methods for obtaining the highly selective sorbents based on zirconium and magnesium silicates, suitable for use in water purification technologies for the removal of heavy metal ions. The silicates synthetic method is based on the main principles of sol-gel technology. The optimal reagent ratio for spherical granulated zirconium silicate has been selected based on a comparison of the porous and adsorption properties of materials synthesized with different ratios. It is found that the obtained zirconium silicate possesses high adsorption capacity in the removal of heavy metal ions from water solutions, comparable to the results achieved with well-known crystalline and spherical granulated analogues. It has been revealed that hydrothermal treatment of the zirconium silicate hydrogel significantly increases its specific surface area, total pore volume, and distribution coefficients in the extraction of cobalt and nickel ions. This can be explained by the reorganization of the material's porous structure. Firstly, spherical granulated zirconium silicate was tested in dynamic experiments for the removal of strontium from model water simulating the block water of the Chornobyl NPP. The physicochemical properties of the granulated magnesium silicate, obtained using the newly developed original methodology, are compared with those of highly dispersed magnesium silicates synthesized using traditional precipitation, hydrothermal, and sol-gel methods. It is found that the main porous characteristics of the material are not inferior to those of the best sample synthesized by the precipitation method. All samples of magnesium silicates, regardless of the synthesis method, are amorphous substances, even after heat treatment at 600 °C. The obtained granulated sample shows high adsorption capacity for copper and strontium ions — 1 mmol/g (compared to powdered materials synthesized by other methods), and additionally ensures a high removal efficiency (95–99%) of these ions from aqueous solutions at low concentrations (up to 0,2 mmol/L). Firstly, the synthesized granulated zirconium and magnesium silicates were successfully used for the removal of arsenate ions from natural waters with elevated mineralization. Keywords: granulation, sorption, zirconium silicate, magnesium silicate, material morphology, heavy metal ions, hydrothermal treatment.

Read more

Research papers

1. Kravchenko, M.; Kuznetsova, L.; Terebilenko, A.; Tsyba, M.; Romanova I. Porous structure and adsorption properties of magnesium silicates synthesized by three routes. Chemistry, Physics and Technology of Surface. 2023, 14 (1), 113 – 120. https://doi.org/10.15407/hftp14.01.113. (Q4).

2. Kravchenko, M.; Diyuk, O.; Zhuravlev, I.; Meleshevych, S.; Romanova, I. Impact of hydrothermal treatment on the porous structure and adsorption properties of spherically granulated zirconium silicate. Journal of Inorganic and Organometallic polymers and materials. 2023, 33, 2346 – 2353. https://doi.org/10.1007/s10904-023-02663-3. (Q2).

3. Redkina, A.; Konovalova, N.; Kravchenko, N.; Strelko, V. Influence of the porous structure of V2O5-ZrO2-SiO2 catalyst on reaction of propane dehydrogenation. Chemistry & Chemical Technology. 2022, 16 (2), 259–266. https://doi.org/10.23939/chcht16.02.259. (Q3).

4. Kravchenko, M.; Khodakovska, T.; Kovtun, M.; Romanova, I. Inorganic sorbents based on magnesium silicates obtained by two synthetic routes. Environmental Earth Sciences. 2022, 81, 549. https://doi.org/10.1007/s12665-022-10664-7. (Q2).

5. Kravchenko, M.; Redkina, A.; Konovalova, N. Obtaining of zirconium-silicate materials type of aerogels from aqueous solutions of Na2SiO3 and ZrOCl2 salts. Хімія, фізика та технологія поверхні. 2020, 11 (3), 411 – 419. https://doi.org/10.15407/ hftp11.03.411.

6. Редькина, А.; Коновалова, Н.; Кравченко, Н., Стрелко, В. Дегидрирование пропана в пропилен на V2O5, нанесенном на микро - мезопористую систему оксидов ZrO2-SiO2-TiO2. Укр. хім. журн. 2018, 84 (7), 43 – 59.

7. Патент України на корисну модель UA 105999 U, B01J 20/02, B01J 20/06, B01J 20/30, B01J 39/14, C01B 33/32. Золь-гель спосіб одержання сферично гранульованого високопоруватого цирконій силікату // Яковлєв В.І., Стрелко В.В, Кравченко М.В. – № u201510517; заявл. 28.10.2015; опубл. 11.04.2016. – Бюл. № 7.

Патент України на корисну модель UA 146827 U, B01J20/02, B01J20/06, B01J20/10, B01J20/30, B01J39/14, C01B 33/32 Спосіб покращення структурно-сорбційних властивостей силікату цирконію // Ходаковська Т.А., Ковтун М.Ф., Кравченко М.В., Романова І.В. – № u202005456; заявл. 25.08.2020; опубл. 25.03.2021. – Бюл. № 12.

9. The sol-gel synthesis of V2O5-ZrO2-SiO2 nanocomposites and their properties in the gas-phase dehydrogenation of alkane / A. Redkina, M. Kravchenko, V. Yakovlev, N. Konovalova, V. Strelko // Intern. research and practice conf. "Nanotechnology and nanomaterials" (NANO-2016), 24 – 27 August 2016, Lviv, Ukraine, Р. 76.

10. Сферично гранульований силікат цирконію одержаний золь-гель методом як термостійкий катіонообмінник / М. Кравченко // ІV Всеукраїнська науково-практична інтернет-конференція з міжнародною участю “Нанотехнології і наноматеріали у фармації та медицині”, Харків, 17.04.2020. – C. 37.

11. Synthesis nanostructured materials type of aerogels from a spherically granulated hydrogels of zirconium silicate / N. Kravchenko, A. Redkina, N. Konovalova // 8th International research and practice conference “Nanotechnology and nanomaterials” (NANO – 2020), 26–29.08.2020, Lviv, Ukraine. – P. 409–410.

12. Влияние СВЧ обработки на пористую структуру цирконий силикатных гидрогелей / Н. Кравченко, А. Редькина, Н. Коновалова, Н. Цыба // IV Міжнародна (ХIV Українська) наукова конференція студентів, аспірантів і молодих учених «Хімічні проблеми сьогодення» (ХПС-2021), Вінниця (Україна), 23 – 25.03.2021. – P. 103.

13. The effect of microwave treatment on the porous structure of zirconium silicate hydrogels / M. Kravchenko, A. Redkina, N. Konovalova, M. Tsyba // Ukrainian Conference with International Participation “Chemistry, Physics and Technology of Surface” devoted to the 35th anniversary of the Chuiko Institute of Surface Chemistry of NAS of Ukraine “Nanostructures and nanomaterials in medicine: challenges, tasks and perspectives”, Kyiv (Ukraine), 26 – 27.05.2021. – P. 175.

14. Impact of synthetic routes on the porous structure and adsorption properties of magnesium silicates / M. Kravchenko, I. Romanova // Ukrainian Conference with International Participation «Chemistry, Physics and Technology of Surface», Kyiv (Ukraine), 19 – 20.10.2022. – P. 102.

15. Adsorption properties of spherically granulated zirconium silicate after hydrothermal treatment / M. Kravchenko, O. Diyuk, I. Zhuravlev, S. Meleshevych, I. Romanova // Ukrainian Conference with International Participation «Chemistry, Physics and Tecnology of Surface», Kyiv (Ukraine), 11 – 12.10.2023. – P. 88.

16. Kravchenko M., Farbun I., Barsukov V., Kholodko Yu., Kovalchuk I., Romanova I. Novel inorganic materials for arsenic removal from aqueous environment //15th International Conference on Physics of advanced materials (ICPAM-15), Sharm El Sheikh (Egypt), 19 – 26.11.2023. – Р. 133 – 134.

Read more

Files

autoreferat-Aref Kravchenko M-V-.pdf

Дис-робота Кравченка М-В-.pdf

Similar theses

0425U000327

Yuliia A. Stetsiv

Physico-chemical properties of polyaniline films on polymeric substrates

0525U000400

Oleksiy V. Durov

Wetting and contact interaction in systems containing dioxides of elements of group IVb (TiO2, ZrO2, HfO2) and metal melt.

0425U000285

Alina A. Makudera

ZrO2 stabilized by a series of REE oxides of the yttrium subgroup as a basis for designing of novel thermal barrier coatings

0425U000257

Yuriy V. Yurchenko

Phase interactions in ZrO2–HfO2–Ln2O3 ternary oxide systems, where Ln = La, Nd, Sm, Eu, and Gd

0525U000046

Svitlana V. Prudius

Synthesis and catalytic properties of mixed acidic oxides based on elements of III-IV groups.