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New composite hydrogels made from clam and Magellan shells show promise for water purification. These nano-hydroxyapatite-based materials effectively remove Acid Blue 113 dye from water.

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Area of Science:

  • Materials Science
  • Environmental Science
  • Polymer Chemistry

Background:

  • Developing efficient adsorbents for dye removal is crucial for water purification.
  • Nano-hydroxyapatite synthesized from natural shells offers a sustainable material source.
  • Composite hydrogels combine desirable properties for adsorption applications.

Purpose of the Study:

  • To synthesize nano-hydroxyapatite from Clam and Magellan shells.
  • To develop carboxymethyl cellulose/acrylamide/nano-hydroxyapatite composite hydrogels.
  • To investigate the hydrogels' performance as adsorbents for Acid Blue 113 dye.

Main Methods:

  • Wet chemical precipitation for nano-hydroxyapatite synthesis.
  • Free-radical polymerization for composite hydrogel development.
  • Gravimetric method to study swelling and kinetic behaviors.

Main Results:

  • Swelling properties were influenced by calcium ion content in nano-hydroxyapatites.
  • Diffusion coefficients increased with nano-hydroxyapatite content in both Clam shell (CMC-AM/nHA-CS) and Magellan shell (CMC-AM/nHA-MS) hydrogels.
  • CMC-AM/nHA-MS hydrogels exhibited high Acid Blue 113 absorption efficiency and capacity.

Conclusions:

  • Nano-hydroxyapatite derived from shells can be effectively incorporated into hydrogels.
  • Magellan shell-based hydrogels demonstrate significant potential for dye adsorption.
  • These nanocomposite hydrogels are attractive for water purification applications.