Synthesis and functionalization of a Chitosan-PEI-Metallothionein biopolymer with enhanced mechanical and adsorptive properties for heavy metal removal

Key Points

• To develop a biofunctionalized polymeric adsorbent with improved mechanical and adsorptive properties for removing heavy metals.
• Synthesis of Chitosan-PEI-MTLPs through a controlled multi-step grafting process.
• Immobilization of metallothionein-like proteins onto the biopolymer.
• Assessment of mechanical and adsorptive properties.
• Demonstrated enhanced mechanical strength compared to traditional adsorbents.
• Achieved significant adsorption capacity for heavy metals.
• Results indicate a promising potential for environmental cleanup applications.