松香基磁性微球的制备及其对Mn2+的吸附研究

doi:10.3969/j.issn.0253-2417.2018.04.014

Abstract

Abstract: The core-shell magnetic rosin-based polymer microspheres Fe₃O₄@RPM were synthesized by chemical precipitation and suspension polymerization with maleic rosin ethylene glycol acrylate as cross-linking agent, methacrylic acid and methyl methacrylate as monomers, and Fe₃O₄ as a magnetic core. The preparation conditions were optimized. The structure of Fe₃O₄@RPM was characterized by Fourier transform infrared spectrometer(FT-IR), field emission scanning electron microscope (FESEM), X-ray diffraction instrument(XRD), and thermogravimetric analysis(TGA), and so on. The adsorption kinetics and thermodynamics for adsorbing Mn²⁺ were studied through static adsorption experiments. The results showed that the preparation conditions of the polymeric magnetic microspheres with phenanthrene framework were shaking at the speed of 400 r/min,adding 1 g azodiisobutyronitrile as initiator and reacting for 4 h at 70℃. The second-order kinetics model could well describe the adsorption process of Mn²⁺ in the experimental range of concentration and temperature, the adsorption thermodynamic studies showed that ΔH >0,ΔG <0,ΔS >0,which indicated that the adsorption was a spontaneous endothermic process.

Key words: phenanthrene framework, magnetic polymer microspheres, Mn²⁺, kinetics, thermodynamics

CLC Number:

TQ35

LI Kechun, LEI Fuhou, LU Jianfang, ZHOU Juying, ZHAO Yanzhi. Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn²⁺[J]. Chemistry and Industry of Forest Products, 2018, 38(4): 87-94.

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Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn²⁺

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Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn2+

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Preparation of Core-shell Magnetic Rosin-based Polymer Microspheres and Their Adsorption Kinetics and Thermodynamics of Mn²⁺