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1.

Вид документа : Статья из журнала
Шифр издания : Г/F 33
Автор(ы) : Alifkhanova L. M., Lopunova K. Y., Marchuk A. A., Petrova Y. S., Pestov A. V., Neudachina L. K.
Заглавие : Features of sorption preconcentration of noble metal ions with sulfoethylated amino polymers
Место публикации : Russian journal of inorganic chemistry. - 2021. - Vol. 66, № 6. - С. 909-915
ББК : Г
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: Dependencies for the sorption of palladium(II), gold(III), and platinum(IV) chloro complexes from individual and binary solutions with sorbents based on sulfoethylated polyallylamine and poly(aminostyrene) have been obtained. It has been found that predominant sorption mechanism is complexation with functional groups of the sorbents for gold(III) and palladium(II) and ion exchange for platinum(IV). It has been shown that increase in the sulfoethylation degree of aminopolymer matrix leads to decrease of platinum(IV) sorption and therefore, to increase in palladium(II) sorption selectivity relative to this ion. This effect is the largest for the sorbents based on polyallylamine. The conditions of quantitative desorption of the studied metals from sorbent surface have been determined. The sorption of gold(III) by the sorbent based on polyallylamine has been shown to be complicated by gold(III) reduction in sorbent phase.
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2.

Вид документа : Статья из журнала
Шифр издания : 54/P 41
Автор(ы) : Bratskaya S.YU., Zheleznov V. V., Privar Y. O., Mechaev A., Pestov A. V.
Заглавие : Pentacyanoferrate(II) complexes with N-containing derivatives of chitosan and polyallylamine: Synthesis and cesium uptake properties [Электронный ресурс]
Место публикации : Colloids and Surfaces A: Physicochemical and Engineering Aspects. - 2014. - Vol. 460. - С. 145-150
Систем. требования: http://www.sciencedirect.com/science/article/pii/S0927775714003914?np=y#
Примечания : 2.07.2015
ББК : 54
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Ключевые слова (''Своб.индексиров.''): sodium aminoprusside --polymer ligands (chitosan)--polyallylamine
Аннотация: Here we report on synthesis of new organic–inorganic materials based on products of interaction between sodium aminoprusside and polymer ligands (chitosan (CS), N-2-(2-pyridyl)ethylchitosan (2-PC), N-2-(4-pyridyl)ethylchitosan (4-PC), N-(4-methyl-5-imidazolyl)methylchitosan (IC), N-(2-cyanoethyl)chitosan (CC), polyallylamine (PA), N-(2-pyridyl)methyl-polyallylamine (PMPA), N-2-(2-pyridyl)ethyl-polyallylamine (PEPA), N-(4-methyl-5-imidazolyl)methyl-polyallylamine (IPA) and poly(2-vinylpyridine) (PVP)). The composition of the obtained materials was characterized using the element analysis and X-ray diffraction; the Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analysis data were used to propose the structure of the formed complexes. It was established that ion and ligand exchange were the main reactions, through which sodium aminoprusside interacts with water-soluble polymer salts. Reactivity in complex formation reaction of unmodified polymers changes in a row: PA CS PVP. Modification of chitosan with 2-(4-pyridyl)ethyl and 2-cyanoethyl moieties enhances reactivity of chitosan to the level of PA, while introduction of 2-(2-pyridyl) and (4-methyl-5-imidazolyl)methyl moieties, on the contrary, decreases reactivity of chitosan to that of PVP. At the same time, functionalization of PA with 2-pyridylalkyl groups decreases its reactivity in reaction with aminoprusside ion. Thus, reactivity of all studied polymeric matrices changes in the row: PA ≈ 4-PC ≈ CC CS 2-PC ≈ IPA ≈ IC PMPA PVP PEPA. The distribution coefficients with respect to cesium ions have been determined for the synthesized complexes in cobalt(II) form. It has been shown that the complex of chitosan with pentacyanoferrate(II) has higher distribution coefficient with respect to Cs+ ions, as compared to its N-derivatives and synthetic polymers. Organic–inorganic materials obtained in the matrix of synthetic polymers have shown higher tendency to peptization and, therefore, lower sorption capacities and distribution coefficients
\\\\expert2\\nbo\\Colloids and Surfaces A\\2014, v.460, p.145-150.pdf
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3.

Вид документа : Статья из сборника (однотомник)
Шифр издания : 24/Т 42
Автор(ы) : Привар Ю. О., Братская С. Ю., Азарова Ю. А., Нестеров Д. В., Малахова И. А., Иванников С. И., Пестов А. В.
Заглавие : Тиокарбамоилированные производные полиаминов для сорбционного извлечения золота, серебра и ртути из растворов тиосульфатного выщелачивания
Место публикации : Природные опасности, современные экологические риски и устойчивость экосистем: VII Дружининские чтения: материалы Всероссийской научной конференции с международным участием. - Хабаровск: ОмегаПресс, 2018. - С. 75-79
ББК : 24
Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ
Аннотация: We have suggested a one-step method for the synthesis of thi-ocarbamoyl derivatives of polyallylamine (TСPAA) and polyaminostyrene (TСPAS) in the eutectic melt thiourea/ammonium thiocyanate, that is more safe and simple in comparison with the known method of functionalization using carbon disulfide. The resulting derivatives are insoluble and can be used as sor-bents without additional cross-linking. Sorption properties of TCPAA and TCPAS toward gold, silver and mercury ions have been studied in solutions of ammonia-thiosulfate leaching of gold and silver-containing sludge of Chalgan experimental workshop, which are also contaminated with mercury. It was shown that both TCPAA and TCPAS are efficient sorbents for silver, while ef-fective recovery of gold and mercury is achieved only with low- and medium-substituted TCPAA.
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