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New complex-forming organomineral support based on aluminum oxyhydroxide modified with nitrilotris(methylene phosphonic) acid// Russian journal of inorganic chemistryстатья
Информация о цитировании статьи получена из
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Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 30 декабря 2020 г.
- Авторы: Kropacheva T.N., Gazizyanova A.R., Gilmutdinov F.Z.
- Журнал: Russian Journal of Inorganic Chemistry
- Том: 65
- Номер: 8
- Год издания: 2020
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Первая страница: 1150
- Последняя страница: 1159
- DOI: 10.1134/S0036023620080070
- Аннотация: A method for the surface chemical modification of aluminum oxyhydroxide (boehmite γ-AlO (OH))by the nitrilotris(methylene phosphonic) acid (NTP) complexing ligand is proposed. The unmodified andNTP-modified boehmites are characterized using X-ray powder diffraction, XPS, and IR spectroscopy; theacid–base and complex-forming properties of surface-grafted NTP are studied. One of the three phosphonicgroups of NTP is found to be involved in binding to the boehmite surface. The surface concentration andstepwise dissociation constants of grafted NTP are determined. A study of the nickel(II) sorption as a functionof aqueous acidity shows that the modifying coating increases the sorption capacity of boehmite (causingрН50 to shift by one unit toward lower values). In terms of surface complexation theory, nickel(II) sorptionfrom aqueous solutions may be described by models involving ≡Al–ONi+ and ≡Al–ONi(OH) complexes inthe case of boehmite and ≡Al–LHi Nii–3 (i = 0, 1, 2, or 3) complexes in the case of NTP-modified boehmite(NTP-boehmite). NTP anchorage to the surface decreases the stability of nickel(II) complexes compared totheir analogues in solutions. A mechanism of nickel(II) ion binding by NTP-boehmite is suggested. The pre-pared new organomineral support can be used to immobilize those metal ions that form stable complexes withphosphonic acids.
- Добавил в систему: Гильмутдинов Фаат Залалутдинович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | 1-s2.0-S0169433220330002-main.pdf | 1,1 МБ | 25 декабря 2020 [hamster] |