What are chelating resins used for?
Chelating resins are used for efficient removal of Cu2+ ions from aqueous solutions.
What factors affect the efficiency of Cu2+ ion removal using resins?
Factors such as type, functional groups, bead size, and other physical and chemical properties of the resin affect Cu2+ sorption efficiency.
How can functional groups be incorporated into a polymeric matrix?
Functional groups can be incorporated into a polymeric matrix through chemical reactions or physical sorption.
Why are resins with chelating functional groups more selective for Cu2+ ions?
Resins with chelating functional groups are more selective for Cu2+ ions due to their ability to form coordinating bonds with Lewis acids like Cu2+ ions.
What types of interactions are involved in the removal of Cu2+ ions by chelating resins?
The removal of Cu2+ ions by chelating resins involves ionic interactions, electrostatic interactions, and coordination.
Which functional groups are preferred for Cu2+ removal?
Resins with bis-picolylamine, iminodiacetate, and sulfonic functional groups are preferred for Cu2+ removal.
How does the iminodiacetate group bond with Cu2+ ions?
The iminodiacetate group forms coordination bonds with Cu2+ ions through a nitrogen and two oxygen atoms, acting as a three dentate ligand.
What is the coordination type interaction between chelate resins and metal ions?
The coordination type interactions between chelate resins and metal ions offer extremely high selectivity for Cu2+ ions.
How is Cu2+ removal achieved by resins containing iminodiacetate groups?
Cu2+ removal is achieved by resins containing iminodiacetate groups through cation exchange accompanied by chelation, involving coordination bonds and electrostatic bonds.
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