Structural and electrochemical studies of heterogeneous ion exchange membranes based on polyaniline-coated cation exchange resin particles

Polyaniline was deposited on polystyrene sulfonated divinyl benzene resin by varying polymerization time to fabricate heterogeneous PVC matrix membranes.

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Behavior of Embedded Cation-Exchange Particles in a DC Electric Field

International Journal of Molecular Sciences ◽

10.3390/ijms20143579 ◽

2019 ◽

Vol 20 (14) ◽

pp. 3579 ◽

Cited By ~ 7

Author(s):

Lucie Vobecká ◽

Tomáš Belloň ◽

Zdeněk Slouka

Keyword(s):

Ion Exchange ◽

Cation Exchange ◽

Exchange Resin ◽

Cation Exchange Resin ◽

Intrinsic Property ◽

Ion Exchange Resin ◽

Membrane Properties ◽

Ion Exchange Membranes ◽

Separation Processes ◽

Actual Performance

Electrodialysis and electrodeionization are separation processes whose performance depends on the quality and properties of ion-exchange membranes. One of the features that largely affects these properties is heterogeneity of the membranes both on the macroscopic and microscopic level. Macroscopic heterogeneity is an intrinsic property of heterogeneous ion-exchange membranes. In these membranes, the functional ion-exchange component is dispersed in a non-conductive binder. The functional component is finely ground ion-exchange resin particles. The understanding of the effect of structure on the heterogeneous membrane properties and behavior is thus of utmost importance since it does not only affect the actual performance but also the cost and therefore competitiveness of the aforementioned separation processes. Here we study the electrokinetic behavior of cation-exchange resin particle systems with well-defined geometrical structure. This approach can be understood as a bottom up approach regarding the membrane preparation. We prepare a structured cation-exchange membrane by using its fundamental component, which is the ion exchange resin. We then perform an experimental study with four different experimental systems in which the number of used cation-exchange particles changes from 1 to 4. These systems are studied by means of basic electrochemical characterization measurements, such as measurement of current–voltage curves and direct optical observation of phenomena that occur at the interface between the ion-exchange system and the adjacent electrolyte. Our work aims at better understanding of the relation between the structure and the membrane properties and of how structure affects electrokinetic behavior of these systems.

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Simplified radioimmunoassay of urinary drugs of abuse adsorbed on ion-exchange papers.

Clinical Chemistry ◽

10.1093/clinchem/23.10.1921 ◽

1977 ◽

Vol 23 (10) ◽

pp. 1921-1924 ◽

Cited By ~ 1

Author(s):

G J Alexander ◽

S Machiz

Keyword(s):

Ion Exchange ◽

Cation Exchange ◽

Drugs Of Abuse ◽

Exchange Resin ◽

Cation Exchange Resin ◽

Screening Procedure ◽

Central Laboratory ◽

Small Disc

Abstract A convenient screening procedure for presence of drugs of abuse in urine consists of two steps: adsorption of the drugs from urine onto a paper loaded with cation-exchange resin and detection of the adsorbed drugs by direct radioimmunoassay. The first step can be performed in the field, the second in a central laboratory. Storage and transport to the laboratory are simplified because specimens adsorbed on dried paper are stable and can be sent in letter-mail. In the laboratory, a small disc of the ion-exchange paper is exposed to antigen and antibody, rinsed, and tested for radioactivity. Discs treated with positive urines are more radioactive than discs from negative urines.

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DISTRIBUTION COEFFICIENTS AND ION EXCHANGE BEHAVIOUR OF SOME CHLORIDE COMPLEX FORMING ELEMENTS WITH BIO RAD AG50W-XB CATION EXCHANGE RESIN IN MIXED NITRIC-HYDROCHLORIC ACID SOLUTIONS

Solvent Extraction and Ion Exchange ◽

10.1080/07360298908962334 ◽

1989 ◽

Vol 7 (4) ◽

pp. 735-747 ◽

Cited By ~ 5

Author(s):

F.W.E. Strelow

Keyword(s):

Hydrochloric Acid ◽

Ion Exchange ◽

Cation Exchange ◽

Exchange Resin ◽

Cation Exchange Resin ◽

Distribution Coefficients ◽

Chloride Complex ◽

Acid Solutions ◽

Hydrochloric Acid Solutions ◽

Exchange Behaviour

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Ion Exchange Method for Rapid Determination of Alkalinity of Water-Soluble Tea Ash Containing High Levels of Manganese

Journal of AOAC INTERNATIONAL ◽

10.1093/jaoac/63.3.460 ◽

1980 ◽

Vol 63 (3) ◽

pp. 460-461

Author(s):

Saidul Z Qureshi ◽

Fadhil M Najib ◽

Fahmi A Mohammed

Keyword(s):

Ion Exchange ◽

Cation Exchange ◽

Exchange Resin ◽

Rapid Determination ◽

Cation Exchange Resin ◽

Water Soluble ◽

Exchange Method ◽

Strong Cation Exchange ◽

Ion Exchange Method

Abstract An ion exchange method to determine the alkalinity of water-soluble tea ash containing high levels of manganese is described. A chromatographic column containing a strong cation exchange resin (20–50 mesh) in Na+ form, with a bed volume of 5 mL is used. The present ion exchange method is compared to pH titrations and also to the official AOAC methods (31.012, 31.015, 31.016). Results with the new method are accurate and precise.

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