Adsorption of Platinum (IV) by Sorbents Based on Hybrid Composites

Лебедева, О. В.; Chernigovskaya, Marina; Sipkina, E. I.; Pozhidaev, Yu. N.; Raskulova, Tat'yana

doi:10.1134/s2070205116020180

Cited by 6 publications

(3 citation statements)

References 7 publications

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“…Poly-2-methyl-5-vinylpyridine (PMVP) was obtained by radical polymerization of the corresponding monomer according to [3]. N,N'-Bis(3-triethoxysilylpropyl)thiocarbamide (BTM) was obtained by condensation of 3-ethoxysilylpropyl amine and thiocarbamide in presence of ammonium sulfate in accordance with [5].…”

Section: Methodsmentioning

confidence: 99%

“…Adsorbents containing pyrazol, pyridine, thioamide, thiocarbamide, thiosemicarbazide, and other functional groups, including ones containing both sulfide sulfur and aliphatic nitrogen, have been proposed for extraction of platinum metals from acidic solutions [1][2][3]. Polymer adsorbents with a complex forming N,S-functional groups attract special attention due to a combination of two types of donor atoms providing a high strength of coordination compounds of platinum metals in the surface layer of an adsorbent.…”

Section: Introductionmentioning

confidence: 99%

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Organic-Inorganic Composite for Extraction of Platinum(IV)

Лебедева

Pozhidaev

Raskulova

2021

SSP

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A new composite adsorbent was obtained by hydrolytic polycondensation of N,N'-bis (3-triethoxysilyl propyl) thiocarbamide in the presence of poly-2-methyl-5-vinylpyridine. The sorption activity of the composite toward platinum (IV) ions was studied in hydrochloric acid solutions. The maximum extraction efficiency of Pt (IV) and the maximum values of sorptive capacity (218 mg g–1), and a coefficient of interphase distribution (7090 cm3 g–1) of the studied adsorbent in 1 М solution of HCl were found at 338 K. The Langmuir, Freundlich, and Dubinin–Radushkevich models were used to describe adsorption nature.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Organic-Inorganic Composite for Extraction of Platinum(IV)

Лебедева

Pozhidaev

Raskulova

2021

SSP

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“…Copolymers of 4-vinylpyridine (4-VP) with 2hydroxyethylmethacrylate (HEMA) were synthesized according to [5], the composition of the copolymer is 4-VP:HEMA = 70:30 mol %. N,N-bis(3-triethoxysilylpropyl)thiocarbamide (BTM) was obtained.…”

Section: Methodsmentioning

confidence: 99%

Composite Polymer-Silicone Adsorbent for Platinum (IV) Ions: Investigation of Models and Absorption Kinetics

Лебедева¹,

Pozhidaev²,

Konovalenko³

et al. 2018

Proceedings of the International Symposium “Engineering and Earth Sciences: Applied and Fundamental Research” (ISEES 2018)

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The adsorption of platinum (IV) in hydrochloric acid solutions of a composite based on N,N-bis(3triethoxysilylpropyl)thiourea and 4-vinylpyridine-2-hydroxyethylethacrylate copolymer is studied. The value of the static adsorption capacity of the composite for platinum(IV) is found to be 215 mg/g. To describe the nature of the adsorption, Langmuir, Freundlich, and Dubinin-Radushkevich models are used. The adsorption kinetics is estimated using Boyd-Adamson models of pseudo-first and pseudo-second order and the Elovich equation.

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