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Radioiodide Sorption on Natural and Acid-Treated Zeoliteстатья
- Авторы: Belousov P., Tyupina E., Kozlov P., Izosimova Y., Tolpeshta I., Koroleva T., Pokidko B., Krupskaya V., Rumyantseva A.
- Журнал: Minerals
- Том: 15
- Номер: 5
- Год издания: 2025
- Номер статьи: 494
- DOI: 10.3390/min15050494
- Аннотация: This work is devoted to the study of the effect of acid treatment on the structuraland textural properties of natural zeolite and its sorption activity with respect toradioiodide. To carry out the experiments, natural zeolite was treated with nitric acid ofvarious concentrations at 20 and 90 degrees. The following methods were used to studythe samples: XRD, SEM, DTA, XRF, FTIR, BET, and CEC analyses. Experiments on thesorption and desorption of radioiodide were carried out. The obtained results indicatethat acid treatment results in the gradual leaching of aluminum from the crystal latticeand a significant increase in the specific surface area and microporosity of the zeolite. Atthe same time, the morphology of clinoptilolite is not significantly changed. Additionalstudies have shown that acid treatment leads to the hydrophobization of zeolite channelsand the formation of an amorphous aluminosilicate phase, which makes a significantcontribution to the increase in the specific surface area and microporosity. It was foundthat, with an increase in the degree of dealumination of the zeolite, there is an increasein the sorption properties with respect to radioiodide. The maximum values of sorptioncapacity were obtained after treating the zeolite with a 1 M nitric acid solution at 90 ◦C.With a further increase in the concentration of acid, critical changes in the structure of thezeolite occur, leading to a sharp decrease in the sorption capacity. Iodide sorption is notassociated with physical adsorption in the micropores of the zeolite and the newly formedamorphous phase. The main mechanism of the sorption appears to be the interaction withsilanol and bridging hydroxyl groups on the surface of the zeolite and the amorphousaluminosilicate phase.
- Добавил в систему: Тюпина Екатерина Александровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | minerals-15-00494.pdf | minerals-15-00494.pdf | 5,2 МБ | 9 мая 2025 [ulashka_86@mail.ru] | |
| 2. | Акт_экспертизы_Минералс_2025.pdf | Акт_экспертизы_Минералс_2025.pdf | 5,2 МБ | 20 мая 2025 [ulashka_86@mail.ru] |