Characterization of bulk and surface properties of anion-exchange membranes in initial stages of fouling by red wine

Сарапулова, В. В.; Nevakshenova, E.; Nebavskaya, Xenia; Kozmai, Anton; Aleshkina, D.; Pourcelly, G.; Nikonenko, Victor; Pismenskaya, Natalia

doi:10.1016/j.memsci.2018.04.047

Cited by 35 publications

(53 citation statements)

References 85 publications

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“…Conversely, the structure of anthocyanins in a cation exchange resin ( Figure 8 ) corresponds to pH values that are 2–3 units lower than in external solutions of anthocyanins. This phenomenon is similar to mechanisms already reported for ion-exchange membrane fouling by red wine components, primarily anthocyanins [ 93 ]. Hence, the reason for the pH shift of the internal solution of ion-exchange membranes and resins is the well-known [ 85 ] Donnan (electrostatic) exclusion of coions.…”

Section: Resultssupporting

confidence: 89%

“…Note that these anthocyanin anions (for cation-exchange resin) and cations (for anion-exchange resin) in the solution at the surface of an ion-exchange material can decrease the adsorption capacity of a resin if they are not quickly and consistently removed to the solution volume, for example, by mixing. Similar to anthocyanins, phenols, amino acids, carboxylic acids, polybasic organic acids, and other ampholytic substances that are components of juices and wines [ 1 ] participate in protonation/deprotonation reactions with water, also affecting the pH of the internal solution of ion-exchange materials [ 93 , 94 , 95 , 96 ]. This particular effect is one of the reasons not previously discussed that produces differences in anthocyanin adsorption between single solutions and mixtures, for example, with amino acids [ 55 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

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Adsorption of Anthocyanins by Cation and Anion Exchange Resins with Aromatic and Aliphatic Polymer Matrices

Pismenskaya

Сарапулова

Klevtsova

et al. 2020

IJMS

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This study examines the mechanisms of adsorption of anthocyanins from model aqueous solutions at pH values of 3, 6, and 9 by ion-exchange resins making the main component of heterogeneous ion-exchange membranes. This is the first report demonstrating that the pH of the internal solution of a KU-2-8 aromatic cation-exchange resin is 2-3 units lower than the pH of the external bathing anthocyanin-containing solution, and the pH of the internal solution of some anion-exchange resins with an aromatic (AV-17-8, AV-17-2P) or aliphatic (EDE-10P) matrix is 2–4 units higher than the pH of the external solution. This pH shift is caused by the Donnan exclusion of hydroxyl ions (in the KU-2-8 resin) or protons (in the AV-17-8, AV-17-2P, and EDE-10P resins). The most significant pH shift is observed for the EDE-10P resin, which has the highest ion-exchange capacity causing the highest Donnan exclusion. Due to the pH shift, the electric charge of anthocyanin inside an ion-exchange resin differs from its charge in the external solution. At pH 6, the external solution contains uncharged anthocyanin molecules. However, in the AV-17-8 and AV-17-2P resins, the anthocyanins are present as singly charged anions, while in the EDE-10P resin, they are in the form of doubly charged anions. Due to the electrostatic interactions of these anions with the positively charged fixed groups of anion-exchange resins, the adsorption capacities of AV-17-8, AV-17-2P, and EDE-10P were higher than expected. It was established that the electrostatic interactions of anthocyanins with the charged fixed groups increase the adsorption capacity of the aromatic resin by a factor of 1.8–2.5 compared to the adsorption caused by the π–π (stacking) interactions. These results provide new insights into the fouling mechanism of ion-exchange materials by polyphenols; they can help develop strategies for membrane cleaning and for extracting anthocyanins from juices and wine using ion-exchange resins and membranes.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Adsorption of Anthocyanins by Cation and Anion Exchange Resins with Aromatic and Aliphatic Polymer Matrices

Pismenskaya

Сарапулова

Klevtsova

et al. 2020

IJMS

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“…These groups enter electrostatic interactions with anthocyanins provided that those have an electrical charge, and the value of the charge of anthocyanins in the resin depends on the exchange capacity of the ion-exchange materials and may differ from their charge in the external solution. This phenomenon is similar to the phenomenon that has already been observed by us when studying the mechanisms of poisoning of ion-exchange membranes by the components of red wine, anthocyanins in the first place [24]. The reason for the shift of pH of the internal solution of ion-exchange membranes and resins is a wellknown [50] Donnan (electrostatic) exclusion of coions including protons or hydroxyl ions, which are the products of the protonation-deprotonation reac- Figure 6 illustrates the action of this effect on the electrical charge of anthocyanins in internal and external solutions of an anion-exchange resin when pH of the external solution is 6.…”

Section: O −supporting

confidence: 87%

“…It has been found [16][17][18] that the use of ion-exchange materials promotes growth in the yield with respect to the target product in comparison with nonpolar sorbents, makes it possible to separate polyphenols from sugars and other components of the liquid media under processing [19,20], and promotes an increase in the antioxidant activity of anthocyanins [21]. On the other hand, it is known that phenol compounds and, first of all, anthocyanins and their compounds with amino acids, proteins, and sugars, are the main reason for the deterioration of the transport characteristics of ion-exchange membranes in the electrodialysis processes of wine stabilization and adjustment of pH of fruit juices [22][23][24][25]. These facts force thorough study of the mechanisms of interaction of anthocyanins with ion-exchange materials.…”

Section: Introductionmentioning

confidence: 99%

Electrostatic Interactions of Ion-Exchange Materials with Anthocyanins in the Processes of Their Sorption and Electrodialysis Extraction from Liquid Media

Сарапулова

Klevtsova

Pismenskaya

2020

Membr. Membr. Technol.

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The nutritional value of wines as well as fruit and berry juices is to a large extent determined by the presence of anthocyanins in them, which possess antioxidant activity. To extract these substances from food waste as well as to condition juices and wines, ion-exchange resins and membranes based on them are being increasingly used. The kinetics of sorption of anthocyanins by ion-exchange resins from model solutions with pH of 3, 6, and 9 is studied. It is shown that the Donnan exclusion of coions leads to a change in the structure of anthocyanins in the internal solution of ion-exchange materials compared to the external solution. As a result, the electrostatic interactions of anthocyanins with ion-exchange materials are weakened or enhanced compared to the expected interactions based on pH of the external solution. Large anthocyanin molecules more easily penetrate heterogeneous ion-exchange membranes compared to the resins from which they are fabricated. The reason is the presence of extended macropores localized at the boundaries of the contacts of the reinforcing cloth and composite of the ion-exchange material with an inert binding agent in the membranes.

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“…The presence of macropores in CJMC-3 and CJMC-5 in combination with the aliphatic polymer matrix, which contains small quantities of aromatic cross-linking substances, makes these membranes promising for use in ED processing of solutions that contain high-molecular-weight aromatic substances. It is known [ 31 , 103 ] that it is fouling of ion-exchange membranes by such substances as anthocyanins, proanthocyanins, and tannins that restrains the widespread use of electrodialysis in the conditioning of wine [ 17 ], pH adjustment of juice and wine [ 104 ], and the extraction of antioxidants from food industry waste [ 105 ], etc. Therefore, researchers make great efforts to tackle this phenomenon [ 106 , 107 , 108 ] and use complex mixtures of organic solvents or inorganic oxidizing agents to clean membranes [ 107 , 109 ].…”

Section: Resultsmentioning

confidence: 99%

Transport and Electrochemical Characteristics of CJMCED Homogeneous Cation Exchange Membranes in Sodium Chloride, Calcium Chloride, and Sodium Sulfate Solutions

et al. 2020

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Recently developed and produced by Hefei Chemjoy Polymer Material Co. Ltd., homogeneous CJMC-3 and CJMC-5 cation-exchange membranes (CJMCED) are characterized. The membrane conductivity in NaCl, Na2SO4, and CaCl2 solutions, permeability in respect to the NaCl and CaCl2 diffusion, transport numbers, current–voltage curves (CVC), and the difference in the pH (ΔpH) of the NaCl solution at the desalination compartment output and input are examined for these membranes in comparison with a well-studied commercial Neosepta CMX cation-exchange membrane produced by Astom Corporation, Japan. It is found that the conductivity, CVC (at relatively low voltages), and water splitting rate (characterized by ΔpH) for both CJMCED membranes are rather close to these characteristics for the CMX membrane. However, the diffusion permeability of the CJMCED membranes is significantly higher than that of the CMX membrane. This is due to the essentially more porous structure of the CJMCED membranes; the latter reduces the counterion permselectivity of these membranes, while allowing much easier transport of large ions, such as anthocyanins present in natural dyes of fruit and berry juices. The new membranes are promising for use in electrodialysis demineralization of brackish water and natural food solutions.

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Characterization of bulk and surface properties of anion-exchange membranes in initial stages of fouling by red wine

Cited by 35 publications

References 85 publications

Adsorption of Anthocyanins by Cation and Anion Exchange Resins with Aromatic and Aliphatic Polymer Matrices

Adsorption of Anthocyanins by Cation and Anion Exchange Resins with Aromatic and Aliphatic Polymer Matrices

Electrostatic Interactions of Ion-Exchange Materials with Anthocyanins in the Processes of Their Sorption and Electrodialysis Extraction from Liquid Media

Transport and Electrochemical Characteristics of CJMCED Homogeneous Cation Exchange Membranes in Sodium Chloride, Calcium Chloride, and Sodium Sulfate Solutions

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