Lignin-Derived Sustainable Nano-Platforms: A Multifunctional Solution for an Efficient Dye Removal

Area of Science:

• Materials Science
• Environmental Science
• Nanotechnology

Background:

• Conventional adsorbents are often non-biobased and costly.
• Lignin presents a cost-effective and environmentally friendly alternative for water purification.
• Lignin nanoparticles (LNPs) are synthesized via simple physical processes.

Purpose of the Study:

• To explore the multifunctional properties of lignin nanoparticles (LNPs) for water treatment.
• To investigate the adsorption and photodegradation capabilities of LNPs for methylene blue (MB).
• To assess the impact of synthesis methods on LNP performance.

Main Methods:

• Synthesis of LNPs using solvent-antisolvent nanoprecipitation (SLNPs) and hydrotropic methods.
• Evaluation of MB adsorption efficiency and kinetics.
• Assessment of MB photodegradation under UV irradiation.
• Investigation of LNP recyclability and reusability.

Main Results:

• SLNPs achieved 98% MB removal with a high adsorption capacity (43.0 mg/g) and rapid kinetics.
• Hydrotropic LNPs (HLNPs) demonstrated 98% MB degradation within 6 hours via photocatalysis.
• Both SLNPs and HLNPs exhibited multifunctional capabilities for dye pollutant removal.
• HLNPs showed excellent recyclability and reusability.

Conclusions:

• LNPs function as efficient multifunctional materials for concurrent adsorption and photocatalytic degradation of dye pollutants.
• The synthesis method significantly influences LNP performance, with SLNPs excelling in adsorption and HLNPs in photocatalysis.
• This research supports the development of sustainable, biobased water treatment platforms using LNPs.