CHIAM

    Master this deck with 11 terms through effective study methods.

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    What is ion exchange?

    A reversible reaction replacing undesirable ions with similar charge ions from a solid material.

    What contaminants can ion exchange remove?

    Heavy metals, nutrients, nitrates, radionuclides, and industrial chemicals.

    What are the three interconnected lenses in ion exchange?

    Physical, Chemical, and Biological processes.

    What is the most common base material for ion exchange resins?

    Cross-linked polystyrene.

    How do Strong Acid Cation (SAC) resins differ from Weak Acid Cation (WAC) resins?

    SAC uses sulfonic acid and is for water softening, while WAC uses carboxylic acid for selectivity.

    Why are natural ion exchangers preferred sometimes?

    They are low-cost, abundant, and environmentally friendly despite lower exchange capacity.

    What is exchange capacity in ion exchange?

    The total number of exchangeable ions per unit mass or volume of resin.

    What does selectivity mean in the context of ion exchange?

    The resin's preference for one ion over others in the solution.

    What are the two main rate-controlling physical processes in ion exchange?

    Film diffusion and Particle diffusion.

    What is film diffusion?

    Transport of ions across the liquid film surrounding the resin particle.

    How does increasing flow velocity affect ion exchange?

    It reduces liquid film thickness, decreasing diffusion resistance and increasing exchange rate.