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Environmentally friendly cellulose-based polyelectrolytes in wastewater treatment.

Kinga Grenda1, Julien Arnold2, José A F Gamelas3

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Modified cellulose fibers create effective, eco-friendly polyelectrolytes (PELs) for removing dyes from wastewater. These biodegradable bio-PELs offer a sustainable solution for industrial effluent treatment, reducing sludge.

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Biotechnology

Background:

  • Wastewater treatment requires efficient and sustainable dye removal methods.
  • Natural-based polyelectrolytes (PELs) offer biodegradable and renewable alternatives.
  • Cellulose, a readily available biopolymer, can be modified for enhanced functionality.

Purpose of the Study:

  • To chemically modify surplus Eucalyptus cellulose fibers into positively charged polyelectrolytes (PELs).
  • To evaluate the efficacy of these novel bio-PELs in removing both anionic and cationic dyes from wastewater.
  • To assess the potential of these materials as eco-friendly flocculation agents.

Main Methods:

  • Periodate oxidation of cellulose to introduce aldehyde groups.
  • Modification with alkylammonium to impart cationic charge.
  • Characterization using various analytical techniques.
  • Decoloration experiments using the most effective PEL with bentonite aid.

Main Results:

  • Successfully synthesized positively charged cellulose-based PELs.
  • The PEL with the highest cationic substitution demonstrated effective color removal for both anionic and cationic dyes.
  • Bentonite aided the flocculation process.

Conclusions:

  • Modified cellulose-based PELs are effective and eco-friendly flocculation agents for dye removal.
  • These bio-PELs offer a sustainable solution for treating industrial effluents.
  • The biodegradable nature of these agents leads to reduced sludge production.