A recyclable and regenerable magnetic chitosan absorbent for dye uptake

Published Date
Received 16 March 2016, Revised 5 May 2016, Accepted 12 May 2016, Available online 16 May 2016

Author
Weifeng Zhao. Author links open the author workspace.Opens the author workspacea. Numbers and letters correspond to the affiliation list. Click to expose these in author workspaceb. Numbers and letters correspond to the affiliation list. Click to expose these in author workspaceXuelian Huang. Author links open the author workspace.Opens the author workspacea. Numbers and letters correspond to the affiliation list. Click to expose these in author workspaceYilin Wang. Author links open the author workspace.Opens the author workspacea. Numbers and letters correspond to the affiliation list. Click to expose these in author workspaceShudong Sun. Author links open the author workspace.Opens the author workspacea. Numbers and letters correspond to the affiliation list. Click to expose these in author workspaceChangsheng Zhao. Author links open the author workspace.Opens the author workspaceOpens the author workspacea. Numbers and letters correspond to the affiliation list. Click to expose these in author workspace

a

College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, 610065 Chengdu, China

b

Fiber and Polymer Technology, School of Chemical Science and Engineering, Royal Institute of Technology (KTH), Teknikringen 56-58 SE-100 44, Stockholm, Sweden

Highlights

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A recyclable and regenerable magnetic polysaccharide absorbent for methylene blue (MB) removal was developed.

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The self-assembly of polysaccharide with magnetic nanopartices did not alter the saturation magnetization value of the absorbent.

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The removal ability of MB after desorption did not reduce, demonstrating an excellent regeneration ability.

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The proposed strategy provides new insights into utilizing polysaccharides for environmental remediation.

Abstract

emoval was prepared by coating magnetic polyethyleneimine nanoparticles (PEI@MNPs) with sulfonated chitosan (SCS) and further cross-linked with glutaraldehyde. The driving force for coating is the electrostactic interaction between positively charged PEI and negatively charged SCS. Infrared spectra, zeta potential, thermal gravimetric analysis and X-ray diffraction demonstrated the successful synthesis of magnetic polysaccharide absorbent. The self-assembly of polysaccharide with magnetic nanopartices did not alter the saturation magnetization value of the absorbent confirmed by vibrating sample magnetometer. The nanoparticles showed fast removal (about 30 min reached equilibrium) of MB. In particular, the removal ability of MB after desorption did not reduce, demonstrating an excellent regeneration ability. Our study provides new insights into utilizing polysaccharides for environmental remediation and creating advanced magnetic materials for various promising applications.

Keywords

Magnetic chitosan absorbent

Recyclable

Regenerable

Self-assembly

Post-crosslinking

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