Biopolymer Encapsulation of PEI-Derivatives for Heavy Metal Sorption

Abstract:

Composite materials have been synthesized by alginate or chitosan encapsulation of polyethylenimine (PEI) derivatives (obtained by glutaraldehyde grafting of histidine and carbon disulfide). Discrete or agglomerated PEI-derivative particles are immobilized in the macroporous network of biopolymer matrix (as shown by scanning electron microscopy and SEM-EDX analysis). The effect of pH and initial concentration on Zn (II) and Cu (II) sorption performance were analyzed. The incorporation of PEI-derivatives biopolymer matrix improves sorption performance in complex solutions (doped with CaCl₂) compared to pristine biopolymer. Maximum sorption capacities range from 0.64 to 1 mmol L^-1 for Zn (II) and from 1.13 to 1.67 mmol L^-1 for Cu (II).

• Periodical: Advanced Materials Research (Volume 1130)
• Pages: 529-532
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1130.529
• Online since: November 2015
• Authors: Caroline Bertagnolli, Thierry Vincent, Eric Guibal*
• Keywords: Adsorption, Biopolymers, Heavy Metal, Polyethylenimine

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