不同尺寸改性果胶基磁性微球的制备及对Pb<sup>2+</sup>吸附性能的研究

doi:10.11896/cldb.21050165

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Abstract The ethylenediamine modified pectin was used as matrix, compounded with sodium alginate and Fe₃O₄ to synthesize modified pectin-based magnetic microspheres with different sizes (750 μm, 540 μm, 400 μm and 100 μm) by microcapsule encapsulator. The samples were cha-racterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy analysis (SEM) and electron-microscopic analysis. The Pb²⁺adsorption properties of modified pectin-based magnetic microspheres with different sizes were then studied. The results showed that the adsorption equilibrium of Pb²⁺ on the modified pectin-based magnetic microspheres (100 μm) only need 1 h. Kinetics of Pb²⁺ adsorption process were better described by the pseudo-second-order kinetic equation, indicating that the adsorption rate is controlled by chemical adsorption. Langmuir model could better fit the experimental results, and the maximum adsorption capacity of the modified pectin-based magnetic microspheres (100 μm) was 256.41 mg/g. The desorption and regeneration experiment showed that the modified pectin-based magnetic microspheres (100 μm) exhibited great regeneration ability after nine desorption cycles.

Key words： ethylenediamine pectin magnetic microsphere lead ion adsorption

Published: 10 May 2023 Online: 2023-05-04

CLC number:

O647.3

Fund:Central Public-interest Scientific Institution Basal Research Fund for Chinese Academy of Tropical Agricultural Sciences (1630062021012), Natural Science Foundation of Hainan Province (320QN320) and Innovation Team of Modern Agricultural Industry Technology System in Guangdong Province of China (2022KJ116).

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	Articles by authors
	LI Ya
	MA Feiyue
	ZHANG Ming
	TU Xinghao
	DU Liqing

Cite this article:

LI Ya,MA Feiyue,ZHANG Ming, et al. Preparation and Pb²⁺ Adsorption Properties of Modified Pectin-based Magnetic Microspheres with Different Sizes[J]. Materials Reports, 2023, 37(9): 21050165-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21050165 OR http://www.mater-rep.com/EN/Y2023/V37/I9/21050165

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