A New Sulfonic Acid Cation-Exchange Resin Based on Polyvinyl Chloride and Its Evaluation in Water Softening

Mukhamediev, M. G.; Bekchanov, Davron; Juraev, Murod; Lieberzeit, Peter A.; Gafurova, D. A.

doi:10.1134/s1070427221120041

Cited by 8 publications

(5 citation statements)

References 8 publications

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“…The concentration of Cr(VI) ions before and after sorption in the solution was measured in the absorption range of 540 nm on a spectrophotometer (Perkin‐Elmer, USA). [ 30 ] The adsorption capacity of the adsorbent at time t , q t (mg g −1 ), was calculated as:

\begin{equation}{q_t} = ({C_0} - {C_t}) \times V/m,\end{equation}

where C (mg L −1 ) is the concentration of dichromate ions at the time of contact, V (L) is the volume of the dichromate ions containing solution, and m (g) is the mass of the adsorbent.…”

Section: Methodsmentioning

confidence: 99%

Anion exchange material based on polyvinylchloride and urea for the removal of chromium(vi) ions from aqueous solutions

Bekchanov,

Mukhamediev,

Babojonova

et al. 2023

CLEAN Soil Air Water

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In this study, an anion exchange material obtained by chemically modifying granulated polyvinyl chloride with urea was examined. To study the structural morphology of the anion exchanger, polymer PVC‐based anion exchange resin second type (PPE‐2), we applied different characterization techniques including X‐ray diffraction (XRD), Fourier‐transform infrared (FTIR), scanning electron microscopy (SEM), and water vapor adsorption analysis. Moreover, PPE‐2 was used to remove hexavalent chromium ions from aqueous media. A pseudo‐second order model was used to describe sorption kinetics as well as the adsorption mechanism. The Langmuir isotherm and the pseudo‐second order kinetic model led to the most consistent results in describing ion removal from solution. In the case of hexavalent chromium ions, the maximum adsorption capacity was 148.4 mg g−1. The Dubinin‐Radushkevich (D‐R) free energy of adsorption (ED) was >16 kJ mol−1, which indicates chemical interaction between the ion exchange material and Cr(VI) ions. The Gibbs energy ΔG, enthalpy ΔH, and entropy ΔS changes during binding showed that the sorption process is spontaneous and involves chemical sorption through endothermic ion exchange reactions. In addition, the results demonstrate that the anion exchanger (PPE‐2) very efficiently removed hexavalent chromium ions from industrial wastewater.

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\begin{equation}{q_t} = ({C_0} - {C_t}) \times V/m,\end{equation}

where C (mg L −1 ) is the concentration of dichromate ions at the time of contact, V (L) is the volume of the dichromate ions containing solution, and m (g) is the mass of the adsorbent.…”

Section: Methodsmentioning

confidence: 99%

Anion exchange material based on polyvinylchloride and urea for the removal of chromium(vi) ions from aqueous solutions

Bekchanov,

Mukhamediev,

Babojonova

et al. 2023

CLEAN Soil Air Water

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“…Fe(III) and Fe(II) ions were sorbed on anion-exchanger containing an amino group and a Fe 3 O 4 & ion-exchanger composite with magnetic properties was obtained by NaOH precipitation. On the basis of the kinetic model, the pseudo-first-order and pseudo-secondorder of the reaction [14,15] of the resulting composite material with respect to the organic RhB dye in wastewater was studied.…”

Section: Synthesis Of Ion Exchange Materialmentioning

confidence: 99%

Removal of Rhodamine B from Wastewater by Adsorption using Iron Oxide-Polymer Composite Material

Eshtursunov,

Inkhonova,

Botirov

et al. 2023

ajc

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The discharge of dye-containing wastewater from textile, paper and plastic industries poses serious environmental pollution hazards. This study investigates the potential application of an ion exchange material-iron oxide composite to remove rhodamine B dye from aqueous solutions. The composite was synthesized by incorporating iron oxide nanoparticles into a cationic ion exchange matrix containing amine groups with high affinity for rhodamine B dye. Batch adsorption experiments were conducted under controlled pH, temperature and initial rhodamine B dye concentrations. The results demonstrate that the composite material can effectively remove rhodamine B dye, with adsorption capacities reaching 23570.4 mg/g and removal efficiencies over 90% under the optimal conditions at pH 7 and 30 ºC. The adsorption followed pseudo-second order kinetics indicating chemisorption as the main mechanism. The findings suggested that this composite material can serve as an efficient and low-cost adsorbent for removing cationic dyes like rhodamine B dye from textile and other industrial wastewaters due to its high capacity, rapid adsorption rate and magnetic properties that enable easy separation.

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“…Solutions with a concentration of 0.1 mol/L were prepared and the sorption duration of metal ions from the prepared artificial solutions was studied at 2, 4, 6, 8, 10 hours, at temperatures of 293, 298 and 303 K. In order to do this, a dry anion exchanger with a static exchange capacity of 6.75 mg-eqv g -1 for HCl, was weighed from 0.3 g on an analytical balance and placed in conical flasks with a volume of 250 ml and 100 ml of saline solution was poured. The concentrations of Cr (VI) ions in initial and final solutions were determined spectrophotometrically at 540 nm by Spectrophotometer (Micro plate reader Perkin Elmer) (USA) using 1,5-diphenyl carbazide as a complexing agent [30]. The adsorption capacity of the adsorbent at time t, qt (mg/g), was calculated:…”

Section: Adsorption Experimentsmentioning

confidence: 99%

Efficiently Removal Chromium (VI) Using Anion Exchanger on the base Polyvinylchloride: Isotherm, Kinetic and Thermodynamic Studies

Bekchanov

Mukhamediev

Babojonova

et al. 2022

Preprint

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Chromium pollution of water is one of the severest environmental challenges threatening human health. Anion exchange material on the based polyvinylchloride have been demonstrated effective in dichromate ions removal. To study the structure morphology of the PPE-2 anion exchanger different characterization techniques such as XRD, FTIR, and SEM were applied. Moreover, the synthesized anion exchanger PPE-2 was used as effective removal for hexavalent chromium ions in aqueous media. The pseudo-first order and pseudo-second order used to evaluate the kinetic models and the mechanism of the adsorption. Results showed that the adsorption kinetics best fit the pseudo-second order model. The Freundlich isotherm and the pseudo-second order kinetic model were more consistent with the removal of ions from aqueous solutions. In the case of hexavalent chromium ions, the maximum adsorption capacity was 148,4 mg/g. Dubinin-Radushkevich (D-R) free energy of adsorption (ED) energy values were >16 kJ/mol which indicates chemical interaction between ion exchange material and Cr (VI) ions. Thermodynamic data revealed spontaneous endothermic processes and was a chemisorption reaction. In addition, results show that the anion exchanger (PPE-2) has high efficiency for removing hexavalent chromium ions from wastewater containing.

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A New Sulfonic Acid Cation-Exchange Resin Based on Polyvinyl Chloride and Its Evaluation in Water Softening

Cited by 8 publications

References 8 publications

Anion exchange material based on polyvinylchloride and urea for the removal of chromium(vi) ions from aqueous solutions

Anion exchange material based on polyvinylchloride and urea for the removal of chromium(vi) ions from aqueous solutions

Removal of Rhodamine B from Wastewater by Adsorption using Iron Oxide-Polymer Composite Material

Efficiently Removal Chromium (VI) Using Anion Exchanger on the base Polyvinylchloride: Isotherm, Kinetic and Thermodynamic Studies

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