Disulphide Cross-Linked Ultrashort Peptide Hydrogelator for Water Remediation.

Area of Science:

• Supramolecular Chemistry
• Materials Science
• Environmental Science

Background:

• Single amino acid changes significantly impact peptide self-assembly and hydrogelation.
• Wastewater dye removal is critical due to freshwater scarcity.
• Developing efficient, eco-friendly adsorbents is a key research area.

Purpose of the Study:

• To develop a novel ultrashort peptide hydrogelator with tunable self-assembly properties.
• To investigate the hydrogel's stability and physical characteristics (e.g., insolubility, thixotropy, injectability).
• To explore the hydrogel's efficacy in removing organic dyes from wastewater.

Main Methods:

• Synthesis of a C-terminal cysteine-containing ultrashort peptide.
• Characterization of hydrogel formation via non-covalent and covalent interactions.
• Assessment of hydrogel stability across a wide pH range (1-13).
• Evaluation of dye adsorption capacity in both gel phase and on solid supports (filter paper, cotton).

Main Results:

• The peptide successfully formed a hydrogel through combined interactions.
• The resulting hydrogel exhibited remarkable insolubility in aqueous solutions across all tested pH values.
• The hydrogel demonstrated thixotropic and injectable properties.
• Effective removal of organic dyes from wastewater was achieved using the hydrogelator.

Conclusions:

• A C-terminal cysteine-containing peptide can form a robust, insoluble hydrogel.
• This peptide hydrogel is a promising candidate for wastewater treatment due to its stability and dye adsorption capabilities.
• The hydrogel's versatility in gel and solid-supported forms offers practical applications in environmental remediation.