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Progress in pectin based hydrogels for water purification: Trends and challenges.

Sourbh Thakur1, Jyoti Chaudhary2, Vinod Kumar3

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Pectin hydrogels show great potential for removing toxic pollutants from wastewater. A specific pectin hydrogel demonstrated high adsorption capacities for various dyes and heavy metal ions.

Keywords:
Bio-waste materialHeavy metal ions and dye removalPectinPectin based hydrogelWater pollution

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Area of Science:

  • Polymer Science
  • Environmental Science
  • Materials Science

Background:

  • Pectin, a natural polymer, offers versatile applications due to its unique structure.
  • Pectin-based hydrogels are synthesized for pharmaceutical, biomedical, and environmental uses.
  • Hydrogels possess properties like swellability and hydrophilicity, making them suitable for wastewater treatment.

Purpose of the Study:

  • To review the application of pectin-based hydrogels for toxic pollutant removal from aqueous solutions.
  • To highlight the enhanced adsorption capabilities of pectin-based hydrogel nanocomposites.
  • To discuss pectin structure, properties, and applications.

Main Methods:

  • Synthesis of pectin-based hydrogels, including nanocomposites.
  • Evaluation of hydrogel properties such as swellability and hydrophilicity.
  • Assessment of adsorption capacities for various pollutants (dyes and metal ions).

Main Results:

  • Pectin-based hydrogels effectively remove toxic pollutants like metal ions and dyes from water.
  • A sodium acrylate-co-N-isopropylacrylamide based pectin hydrogel exhibited maximum adsorption capacities for methyl violet (265.49 mg/g) and methylene blue (137.43 mg/g).
  • This hydrogel also showed significant adsorption for Pb(II), Cu(II), Co(II), and Zn(II) ions.

Conclusions:

  • Pectin-based hydrogels are promising materials for efficient wastewater treatment.
  • Nanoparticle incorporation can enhance the pollutant adsorption performance of pectin hydrogels.
  • Further research into pectin hydrogel applications for environmental remediation is warranted.