Palladium (II) sorption from nitric acid solutions by silica modified with amino groups
https://doi.org/10.17073/0021-3438-2016-3-12-19
Abstract
Sorption of Pd(II), Ag(I) and Cu(II) from nitric acid solutions by silica chemically modified with γ-aminopropyltriethoxysilane was studied. Based on the research of solid phase by IR & X-ray photoelectron spectroscopy, as well as thermogravimetry, it was suggested that palladium sorption from nitric acid solutions includes the following processes: coordination of palladium ions to nitrogen atoms of the functional group, reaction of palladium ions with the silica matrix and formation of polynuclear complexes. It was also proposed to use 5 % thiourea solution in 0,1 M HCl as a palladium desorbent. It was determined that the time of constant sorption rate settling in static conditions was (min): for Ag(I) – 10, for Cu(II) – 20, Pd(II) – 30. The row of ion sorption (imbibition) from 2 M HNO3 is as follows: АAg(I) > АPd(II) >> АCu(II). At the same time, silver ions are not adsorbed from solutions with a concentration of HNO3 < 1 M thus creating prerequisites for separation of ions.
Keywords
About the Authors
E. V. Volchkova
Московский технологический университет (МИТХТ), 119571, г. Москва, пр-т Вернадского, 86
Russian Federation
Russian Federation
Cand. Sci. (Chem.), associate prof., Department of chemistry and technology of rare and scattered elements, and nanoscale composite materials (CTRSE&NCM), Moscow Technological University (MITHT), 119571, Russia, Moscow, Vernadskogo pr., 86
I. V. Boryagina
ОАО «Научно-производственный комплекс «Суперметалл» им. Е.И. Рытвина», 141551, Московская обл., Солнечногорский р-н, пос. Андреевка
Russian Federation
researcher of JSC «SPC «Supermetall», 141551, Russia, Moscow region, Solnechnogorsk district, the village of Andreevka
Russian Federation
researcher of JSC «SPC «Supermetall», 141551, Russia, Moscow region, Solnechnogorsk district, the village of Andreevka
T. M. Buslaeva
Московский технологический университет (МИТХТ), 119571, г. Москва, пр-т Вернадского, 86
Russian Federation
Russian Federation
Dr. Sci. (Chem.), professor of Department of CTRSE&NCM, MITHT.
A. A. Ablitsov
Московский технологический университет (МИТХТ), 119571, г. Москва, пр-т Вернадского, 86
Russian Federation
Russian Federation
student of MITHT
N. M. Bodnar
Московский технологический университет (МИТХТ), 119571, г. Москва, пр-т Вернадского, 86
Russian Federation
Cand. Sci. (Chem.), senior researcher, engineer of Department of CTRSE&NCM, MITHT.
Russian Federation
Cand. Sci. (Chem.), senior researcher, engineer of Department of CTRSE&NCM, MITHT.
G. V. Ehrlich
МГУ им. М.В.Ломоносова, 119991, г. Москва, ГСП-1, Ленинские горы, д. 1, стр. 3.
Russian Federation
Russian Federation
Dr. Sci. (Chem.), leading researcher, Faculty of Chemistry, Lomonosov Moscow State University , 119991, Russia, Moscow, Leninskie Gory, 1, bld. 3
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Review
For citations:
Volchkova E.V., Boryagina I.V., Buslaeva T.M., Ablitsov A.A., Bodnar N.M., Ehrlich G.V. Palladium (II) sorption from nitric acid solutions by silica modified with amino groups. Izvestiya. Non-Ferrous Metallurgy. 2016;(3):12-19. (In Russ.) https://doi.org/10.17073/0021-3438-2016-3-12-19
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