Sorption of cobalt (II) and chromium (III) ions to nitrogen‐ and sulfur‐containing polyampholyte on the basis of polyvinylchloride

Bekchanov, Davron; Kawakita, Hidetaka; Mukhamediev, M. G.; Khushvaktov, Suyun; Juraev, Murod

doi:10.1002/pat.5209

Cited by 15 publications

(10 citation statements)

References 32 publications

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“…The amount of hexavalent chromium ions absorbed in the anion exchanger is calculated by the following equation:

q_{e} = \frac{(C_{0} - Ce)}{m} \times V,

where q e is the amount of metal ion absorbed into the anion exchanger (mol/g), C 0 is the initial concentration of Cr (VI) ions (mol/L), C e is the equilibrium concentration of Cr (VI) ions (mol/L), V is the solution volume (l), and m is the dry adsorbent mass (g) 31 …”

Section: Methodsmentioning

confidence: 99%

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Bekchanov

Mukhamediev

Lieberzeit

et al. 2021

Polymers for Advanced Techs

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Chemical modification of plasticized polyvinylchloride with polyethylenepolyamine leads to anion exchange resin (PPE-1). Different characterization techniques, such as XRD, FTIR, and SEM of PPE-1 anion exchanger revealed weak base amino groups as well as macroporous structure morphology. PPE-1 turned out effective to remove hexavalent chromium ions from aqueous media. Corresponding adsorption kinetics best fit the pseudo-second order model that followed a Freundlich isotherm. In the case of hexavalent chromium ions, the maximum adsorption capacity of PPE-1 was 218.4 mg/g. Thermodynamic data revealed spontaneous endothermic processes and a chemisorption reaction. In addition, results show that the anion exchanger (PPE-1) has 98% for removing hexavalent chromium ions containing from wastewater.

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“…The amount of hexavalent chromium ions absorbed in the anion exchanger is calculated by the following equation:

q_{e} = \frac{(C_{0} - Ce)}{m} \times V,

Section: Methodsmentioning

confidence: 99%

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Bekchanov

Mukhamediev

Lieberzeit

et al. 2021

Polymers for Advanced Techs

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“…Since chromium (III) ions are absorbed more than cobalt (II) ions, the radius of the Cr 3 + ion is explained by the fact that the radius of the Co 2 + ion is smaller. It was also shown 34 that metal ions are sorbed by polyampholyte both by ionic and coordination bonds (Scheme 10).…”

Section: Modified Pvc Through Nitrogen Containing Reagents (Pvc‐n) An...mentioning

confidence: 99%

“…According to the authors, Cr 3 + ions are absorbed more than Co 2 + ions, respectively, 3.97 and 3.45 mmol/g during the sorption of Co 2 + and Cr 3 + metal ions on polyampholyte. 34 Since chromium (III) ions are absorbed more than cobalt (II) ions, the radius of the Cr 3 + ion is explained by the fact that the radius of the Co 2 + ion is smaller. It was also shown 34 Since PVC is comparatively cheap polymer, it is so economical to use PVC-based membranes in the membrane separation processes.…”

Section: S C H E M E 5 Crosslinking Of the Pvc With Liquid Ammoniamentioning

confidence: 99%

“…The synthesized polyampholyte was used as effective adsorbents for removing Co (II) and Cr (III) ions from aqueous solutions. According to the authors, Cr 3 + ions are absorbed more than Co 2 + ions, respectively, 3.97 and 3.45 mmol/g during the sorption of Co 2 + and Cr 3 + metal ions on polyampholyte 34 . Since chromium (III) ions are absorbed more than cobalt (II) ions, the radius of the Cr 3 + ion is explained by the fact that the radius of the Co 2 + ion is smaller.…”

Section: Modified Pvc Through Nitrogen Containing Reagents (Pvc‐n) An...mentioning

confidence: 99%

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Polyvinyl chloride modifications, properties, and applications: Review

Lieberzeit

Bekchanov

Mukhamediev

2022

Polymers for Advanced Techs

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The present study provides an overview of the latest scientific developments in the field of application and modification of ion exchange sorbents and membranes made of granular and powdery polyvinyl chloride (PVC), focusing on some scientific works, such as water and wastewater treatment, ion exchange, gas separation, etc. For this purpose, an introduction to the various methods of modifying PVC is first given, and then the application of ion exchange sorbents and membrane is discussed. Methods of modification of PVC under homogeneous and heterogeneous conditions using modifiers containing N, S, and O atoms are also described. Various ion-exchange sorbents and membranes based on PVC, methods for modifying PVC and the use of the obtained ion-exchange sorbents and membranes are viewed. A comparison of the sorption properties of ion-exchange sorbents based on PVC and sorbents used in industry has also been carried out.

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“…Cинтезированный полиамфолит использовался в качестве эффективных адсорбентов для удаления ионов Co (II) и Cr (III) из водных растворов [22][23][24]. В работах [25][26][27][28][29][30][31][32] приведены результаты исследования адсорбционных характеристик полимерной матрицы, модифицированной хелатирующими агентами нового поколения.…”

Section: Introductionunclassified

Synthesis and Research of Chelate Forming Sorbent Based on Carbamide, Formaldehyde, Ditizone

2021

Chemistry and Chemical Engineering

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The purpose of this study is the synthesis and study of a chelating sorbent for the extraction of ions of non-ferrous and noble metals. To achieve this goal, a sulfur-containing chelating sorbent based on carbamide, formaldehyde, and dithizone was synthesized and studied. The optimal conditions for the synthesis of the sorbent have been determined and studies have been carried out on the influence of the molar ratios of the starting materials on the composition, and physicochemical properties of the synthesized sorbent. The optimum temperature of polycondensation was taken as 90 °C, the reaction time is 2.5-3 hours, as a result, the reaction is more uniform and the exchange capacity for a 0.1 N HCl solution reaches 3.8 mg-eq/g. As a result of the studies carried out, the sorbent with the best performance was obtained at a 1: 2: 0.5 ratio of carbamide, formaldehyde, and dithizone, respectively. Based on the results of IR spectroscopy, the reaction of sorbent formation is proposed. The static exchange capacity of the synthesized sorbent for metal ions was determined, mg-eq/g: Cu (II) – 2,75; Zn (II) – 2,83; Ni (II) – 2.72; Ag (I) – 3.12

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Sorption of cobalt (II) and chromium (III) ions to nitrogen‐ and sulfur‐containing polyampholyte on the basis of polyvinylchloride

Cited by 15 publications

References 32 publications

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Polyvinylсhloride‐based anion exchanger for efficient removal of chromium (VI) from aqueous solutions

Polyvinyl chloride modifications, properties, and applications: Review

Synthesis and Research of Chelate Forming Sorbent Based on Carbamide, Formaldehyde, Ditizone

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