Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2022

Идентификатор DOI: 10.1134/S0036023622090078

Ключевые слова: adsorption, alumina, germanium, silica

Аннотация: Abstract: The laws of germanium(IV) adsorption by adsorbents based on alumina or silica layer-by-layer modified with polyhexamethylene guanidine (PHMG) and tiron (Al2O3–PHMG–tiron and SiO2–PHMG–tiron) were studied. The effects of Lewis acid sites of alumina on the anchorage of modifier reagents and on germanium(IV) recovery are discussed. In contrast to silica, tiron is anchored to unmodified alumina. Germanium(IV) adsorption on the Al2O3–PHMG–tiron adsorbent is both due to interaction with tiron and due to interaction with the alumina surface, while on SiO2–PHMG–tiron, adsorption is solely due to complexation with the reagent followed by the formation of surface compounds of the Ge : tiron = 1 : 3 stoichiometry. Quantitative (99%) recovery of germanium(IV) by the SiO2–PHMG–tiron adsorbent is achieved in a pH range of 2.0–6.5, and by the Al2O3–PHMG–tiron adsorbent in the range from 0.5 M HCl to pH 8.5. © 2022, Pleiades Publishing, Ltd.

Журнал: Russian Journal of Inorganic Chemistry

Выпуск журнала: Vol. 67, Is. 9

Номера страниц: 1408-1415

ISSN журнала: 00360236

Издатель: Pleiades Publishing

• Losev V.N. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Buiko O.V. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Didukh-Shadrina S.L. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Shimanskii A.F. (Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
• Zhizhaev A.M. (Institute of Chemistry and Chemical Technologies, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation)

• Scopus