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Related Concept Videos

Ion Exchange01:17

Ion Exchange

1.3K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.3K
Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

2.1K
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
2.1K
Social Exchange Theory02:06

Social Exchange Theory

40.8K
We have discussed why we form relationships, what attracts us to others, and different types of love. But what determines whether we are satisfied with and stay in a relationship? One theory that provides an explanation is social exchange theory. According to social exchange theory, we act as naïve economists in keeping a tally of the ratio of costs and benefits of forming and maintaining a relationship with others (Rusbult & Van Lange, 2003).
40.8K
Gas Exchange and Transport01:20

Gas Exchange and Transport

76.9K
Gas exchange, the intake of molecular oxygen (O2) from the environment and the outflow of carbon dioxide (CO2) into the environment, is necessary for cellular function. Gas exchange during respiration occurs largely via the movement of gas molecules along pressure gradients. Gas travels from areas of higher partial pressure to areas of lower partial pressure. In mammals, gas exchange occurs in the alveoli of the lungs, which are adjacent to capillaries and share a membrane with them.
76.9K
Common Ion Effect03:24

Common Ion Effect

46.7K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Châtelier’s principle. Consider the dissolution of silver iodide:
46.7K
Precipitation of Ions03:11

Precipitation of Ions

30.3K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
30.3K

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Updated: Feb 2, 2026

Detection of Viruses from Bioaerosols Using Anion Exchange Resin
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Detection of Viruses from Bioaerosols Using Anion Exchange Resin

Published on: August 22, 2018

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Antifouling Ion-Exchange Resins.

Yara E Ghoussoub, Hadi M Fares, Jose D Delgado

    ACS Applied Materials & Interfaces
    |November 21, 2018
    PubMed
    Summary
    This summary is machine-generated.

    Coating ion-exchange resins with poly(4-styrenesulfonate) (PSS) prevents fouling from algae and organic matter. This low-cost, single-layer treatment enhances resin lifetime without impacting ion-exchange capacity.

    Keywords:
    Chlamydomonas reinhardtiiantifoulingion-exchange resinmicroalgaepolyelectrolytezwitterion

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    Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline
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    Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
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    Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline
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    Online Size-exclusion and Ion-exchange Chromatography on a SAXS Beamline

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    Area of Science:

    • Polymer chemistry
    • Environmental science
    • Materials science

    Background:

    • Organic ion-exchange resins are crucial for water treatment but have limited lifespans due to fouling.
    • Microbial and natural organic matter fouling significantly reduces resin efficiency and longevity.
    • Developing effective antifouling strategies is essential for improving water purification processes.

    Purpose of the Study:

    • To develop and evaluate antifouling coatings for commercial ion-exchange resins.
    • To investigate the efficacy of poly(4-styrenesulfonate) (PSS) and a PSS-zwitterion co-polymer in preventing resin fouling.
    • To determine the optimal conditions for coating application and its impact on resin performance.

    Main Methods:

    • Commercial Dowex 1X8 anion-exchange resin was coated with PSS and a PSS-zwitterion co-polymer.
    • UV-visible spectroscopy was used to quantify PSS sorption kinetics and amounts.
    • Resin samples were challenged with Chlamydomonas reinhardtii algae to assess fouling resistance.
    • Radioactive sulfate ions were employed to study ion-exchange kinetics post-coating.

    Main Results:

    • Coating with PSS or the PSS-zwitterion co-polymer completely eliminated algal fouling.
    • A molecular weight cutoff of approximately 240 repeat units was identified for PSS diffusion into the resin.
    • A single monolayer of PSS conferred antifouling properties, utilizing less than 0.1% of the exchanger capacity.
    • Ion-exchange kinetics remained largely unaffected by the PSS coating.

    Conclusions:

    • A single monolayer of PSS provides effective antifouling protection for ion-exchange resins.
    • This coating method is a fast, low-cost, and efficient approach to extend resin lifespan.
    • The developed antifouling strategy offers a practical solution for enhancing water decontamination and polishing applications.