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Updated: Jan 27, 2026

Preparation and Characterization of SDF-1α-Chitosan-Dextran Sulfate Nanoparticles
Published on: January 22, 2015
Microwave assisted synthesis and characterization of a novel bio-based flocculant from dextran and chitosan
Tao Zeng1, Xue-Qin Hu1, Hao Wu1
1Department of Pharmaceutical Engineering, School of Food and Biological Engineering, Hefei University of Technology, 193# Tunxi Road, Hefei 230009, Anhui Province, PR China.
Abstract:
Polysaccharide-modified flocculants as natural polymeric flocculants are receiving increased attention in the field of water treatment. In this study, a novel high-efficiency and ecofriendly flocculant was synthesized using dextran and chitosan. The flocculant-production method was based on a microwave-heating-initiated graft reaction. Results of Fourier transform infrared spectroscopy, nuclear magnetic resonance imaging, X-ray diffraction, elemental analysis, thermogravimetric analysis, and field-emission scanning electron microscopy confirmed that the grafting was successful. The influences of temperature, flocculant dosage, and pH on flocculation efficiency were investigated. Results indicated that 93.6% of the kaolin solid suspended particles were removed by the flocculant. Previous studies on the flocculation mechanism have shown that flocculation comprises adsorption bridging, charge neutralization, and sweeping flocculation. All these findings indicated the broad prospects of the improved dextran in treating industrial wastewater and developing novel high-performance flocculants.
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