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Updated: Jan 22, 2026

Preparation of Chitosan-based Injectable Hydrogels and Its Application in 3D Cell Culture
Published on: September 29, 2017
Efficient adsorption of Pb(II) from aqueous solutions using aminopropyltriethoxysilane-modified magnetic
Xue Xue Liang1, Xiao-Kun Ouyang1, Songyan Wang1
1School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan 316022, PR China.
Abstract:
The performance of Fe3O4/attapulgite (APT) nanoparticles in Pb(II) adsorption from aqueous solutions could be improved by modifying the particles with aminopropyltriethoxysilane (APTS) and then combining with chitosan (CS) into beads. After preparing the APTS-Fe3O4/APT@CS beads, their surface morphology and crystal phases were analyzed by Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray diffraction. The magnetic properties of APTS-Fe3O4/APT@CS were studied by a vibrating sample magnetometer, while their heat resistance and stability were characterized by thermal weight analysis. A recycling test and comparison of adsorption capacities were also carried out. The adsorption capacity of Fe3O4/APT was improved by the modification with APTS and CS. The adsorption process conforms to the pseudo-second-order kinetic and Langmuir adsorption isotherm models. The adsorption of Pb(II) reaches a maximum of 625.34 mg/g, which compares favorably with other reported adsorbents. The results show that APTS-Fe3O4/APT@CS is a promising hybrid adsorbent for effective removal of Pb(II) from water.
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