New Anion Exchanger Based on Polyvinyl Chloride and Its Application in Industrial Water Treatment

Polymers for Advanced Techs

2022

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.

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

confidence: 99%

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

confidence: 99%

Polyvinyl chloride modifications, properties, and applications: Review

Lieberzeit

Polymers for Advanced Techs

2022

“…In this study [26], the authors studied the laws of dependence of solution pH, sorption duration, and temperature, solution concentration on the sorption of Cr (III) and Co (II) ions into polyampholite based on polyvinyl chloride. The same authors also modified polyvinyl chloride with polyethylenepolyamine to obtain an anion-exchange material [27], which is used effective in the removal of Cr (VI) ions, and PPE-1 anion exchanger, which is highly effective in desalination of river water [28], also obtained polyampholyte on base granular PVC, which is mainly used in the separation of toxic and heavy metal ions [29].…”

Section: Introductionmentioning

confidence: 99%

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

Babojonova

et al. 2022

Preprint

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.

Section: Introductionmentioning

confidence: 99%

“…In the article, the authors 15 obtained an anion exchanger by modifying granular plastic PVC with polyethylenepolyamine (PEPA). Then, as a continuation of this work, 15,16 the resulting anion exchange resin was modified with phosphorous acid to obtain nitrogen and phosphorus‐containing polyampholyte. It is shown that the anion‐exchange resin and polyampholyte based on PVC have a macroporous morphological structure with high thermal and chemical stability 16 .…”

Section: Introductionmentioning

confidence: 99%

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

Kawakita

Polymers for Advanced Techs

et al. 2021

In this article, we studied the process of obtaining nitrogen‐ and sulfur‐containing polyampholyte by chemical modification of sulphocation exchanger. Which is synthesized based on polyvinyl chloride (PVC), with polyethylenepolyamine. Besides, the PVC and synthesized ion exchange resins were characterized using different tools such as FT‐IR, scanning electron microscope, and energy‐dispersive X‐ray. Moreover, the synthesized polyampholyte was used as effective adsorbents for removing Co (II) and Cr (III) ions from aqueous solutions. The Freundlich isotherm and the pseudo‐second order kinetic model were more consistent with the removal of metal ions from aqueous solutions. In the case of Co (II) and Cr (III), the maximum adsorption capacity was 3.45 and 3.97 mmol g−1, respectively. The thermodynamic parameters of the sorption process of metal ions such as free energy (ΔG), enthalpy (ΔН), and entropy (ΔS) of the system were calculated. Furthermore, we find that the adsorption processes were spontaneous and chemisorption.