danДоклады Национальной академии наук БеларусиDoklady of the National Academy of Sciences of Belarus1561-83232524-2431The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8323-2022-66-2-167-175dan-1051Research ArticleХИМИЯCHEMISTRYСорбционные свойства фосфатов Zr-Ca-Mg и Ti-Ca-Mg по отношению к ионам Sr(II)Sorption properties of Zr-CaMg and Ti-Ca-Mg phosphates in relation to Sr(II) ionsИванецА. И.IvanetsA. I.

Иванец Андрей Иванович – член-корреспондент, доктор химических наук, профессор, научный руководитель лаборатории

ул. Сурганова, 9/1, 220072, Минск

Ivanets Andrei I. – Corresponding Member, D. Sc. (Chemistry), Professor, Science Head of the Laboratory

9/1, Surganov Str., 220072, Minsk

andreiivanets@yandex.ruШашковаИ. Л.ShashkovaI. L.

Шашкова Ирина Лукинична – кандидат химических наук, ведущий научный сотрудник

ул. Сурганова, 9/1, 220072, Минск

Shashkova Irina L. – Ph. D. (Chemistry), Leading Researcher

9/1, Surganov Str., 220072, Minsk

shashkova@igic.bas-net.byКитиковаН. В.KitikovaN. V.

Китикова Наталья Владиленовна – кандидат химических наук, старший научный сотрудник

ул. Сурганова, 9/1, 220072, Минск

Kitikova Nataliya V. – Ph. D. (Chemistry), Senior Researcher

9/1, Surganov Str., 220072, Minsk

 

kitikova@igic.bas-net.byДроздоваН. В.DrazdovaN. V.

Дроздова Наталья Владимировна – научный сотрудник

ул. Сурганова, 9/1, 220072, Минск

Drazdova Nataliya V. – Researcher

9/1, Surganov Str., 220072, Minsk

natdrazdova@yandex.byДикаяА. С.DzikayaA. S.

Дикая Анастасия Сергеевна – младший научный сотрудник

ул. Сурганова, 9/1, 220072, Минск

Dzikaya Anastasiya S. – Junior Researcher

9/1, Surganov Str., 220072, Minsk

dikaya-an@mail.ruИнститут общей и неорганической химии Национальной академии наук БеларусиInstitute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus202206052022662167175Copyright © Иванец А.И., Шашкова И.Л., Китикова Н.В., Дроздова Н.В., Дикая А.С., 20222022Иванец А.И., Шашкова И.Л., Китикова Н.В., Дроздова Н.В., Дикая А.С.Ivanets A.I., Shashkova I.L., Kitikova N.V., Drazdova N.V., Dzikaya A.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://doklady.belnauka.by/jour/article/view/1051

Осуществлен синтез фосфатов Zr-Ca-Mg и Ti-Ca-Mg различного состава и изучены их сорбционные свойства по отношению к ионам Sr(II). Исследовано влияние рН водных растворов, а также фоновых электролитов NaCl, CaCl2 , раствора морской воды на сорбционно-селективные свойства фосфатных сорбентов. Изучены изотермы сорбции и кинетические закономерности извлечения ионов Sr(II), проведена математическая обработка экспериментальных данных с использованием различных моделей. Установлено, что наибольшую селективность к ионам Sr(II) проявляют Ti-содержащие сорбенты. Максимальная сорбционная емкость для образца Ti-2 достигает 196,5 мг/г (2,2 ммоль/г). Образцы фосфатов Zr-Ca-Mg и Ti-Ca-Mg сохраняют высокую сорбционную емкость в 0,1 М NaCl растворе и в морской воде. Кинетика сорбции для всех сорбентов с высокой степенью достоверности (R2 ≥ 0,99) описывается уравнением псевдо-второго порядка, что свидетельствует о химическом взаимодействии при сорбции ионов Sr(II). Исследование фазового состава продуктов сорбции свидетельствует об ионообменном и хемосорбционном механизмах поглощения ионов Sr(II).

The synthesis of Zr-Ca-Mg and Ti-Ca-Mg phosphates of different composition was carried out and their sorption properties to Sr(II) ions were studied. The effect of pH of aqueous solutions, as well as of background electrolytes NaCl, CaCl2 , the seawater solution on the sorption-selective properties of phosphate sorbents was studied. The sorption isotherms and kinetic regularities of the Sr(II) ion removal were studied, the mathematical modeling of the experimental data using various models was carried out. It was found that Ti-containing sorbents had the greatest selectivity to Sr(II) ions. The maximum sorption capacity for the Ti-2 sample reached 196.5 mg/g (2.2 mmol/g). Samples of Zr-Ca-Mg and Ti-Ca-Mg phosphates had a high sorption capacity in the 0.1 M NaCl solution and in seawater. The sorption kinetics for all sorbents with a high degree of confidence (R2 ≥ 0.99) was described by a pseudo-second-order equation, due to the chemical interaction during the Sr(II) ions sorption. The study of the phase composition of sorption products indicated the ion exchange and chemisorption mechanism of the Sr(II) ions sorption.

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The authors declare that there are no conflicts of interest present.