Environmentally friendly cellulose-based polyelectrolytes in wastewater treatment.

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.