不同尺寸改性果胶基磁性微球的制备及对Pb2+吸附性能的研究

doi:10.11896/cldb.21050165

材料导报

2023, Vol. 37

Issue (9): 21050165-8 https://doi.org/10.11896/cldb.21050165

高分子与聚合物基复合材料

不同尺寸改性果胶基磁性微球的制备及对Pb²⁺吸附性能的研究

李娅, 马飞跃, 张明, 涂行浩, 杜丽清^*

中国热带农业科学院南亚热带作物研究所,农业农村部热带果树生物学重点实验室,广东湛江 524091

Preparation and Pb²⁺ Adsorption Properties of Modified Pectin-based Magnetic Microspheres with Different Sizes

LI Ya, MA Feiyue, ZHANG Ming, TU Xinghao, DU Liqing^*

Key Laboratory of Tropical Fruit Biology of the Ministry of Agriculture, South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang 524091, Guangdong, China

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摘要本工作以乙二胺改性果胶为基质,将其与海藻酸钠、Fe₃O₄进行复配,采用微胶囊造粒仪制备了不同尺寸(750 μm、540 μm、400 μm、100 μm)的改性果胶基磁性微球。通过红外光谱、热重分析、扫描电子显微镜和显微镜分析对样品进行了表征,并研究了不同尺寸的改性果胶基磁性微球对Pb²⁺的吸附性能。结果表明,100 μm的改性果胶基磁性微球达到吸附平衡仅需要1 h。动力学模拟结果表明,吸附更符合准二级动力学模型,吸附速率受化学吸附控制。Langmuir模型可以较好地拟合实验结果,最大吸附容量为256.41 mg/g。解吸再生实验结果表明,100 μm的改性果胶基磁性微球经过九次解吸循环再生,去除率无明显下降。

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	李娅
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关键词: 乙二胺果胶磁性微球铅离子吸附

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

出版日期: 2023-05-10 发布日期: 2023-05-04

ZTFLH:

O647.3

基金资助: 中国热带农业科学院基本科研业务费专项资金(1630062021012);海南省自然科学基金(320QN320);广东省优稀水果现代农业产业技术体系创新团队建设项目(2022KJ116)

通讯作者: *杜丽清,研究员,海南大学园艺学院硕士研究生导师。2000年于山西农业大学林学系获得学士学位,2003年于山西农业大学果树学专业获得硕士学位。主要从事热带农产品精深加工及副产物综合利用等方面的研究。主编论著4部,发表论文50余篇,其中SCI/EI期刊收录10余篇。获授权专利50余项,其中发明专利10余项。duliqing927618@163.com

作者简介: 李娅,2017年6月、2020年6月分别于南昌大学获得工学学士学位和硕士学位,现就职于中国热带农业科学院南亚热带作物研究所(研究实习员),研究方向为食品(含生物质)资源的开发利用。

引用本文:

李娅, 马飞跃, 张明, 涂行浩, 杜丽清. 不同尺寸改性果胶基磁性微球的制备及对Pb²⁺吸附性能的研究[J]. 材料导报, 2023, 37(9): 21050165-8.
LI Ya, MA Feiyue, ZHANG Ming, TU Xinghao, DU Liqing. Preparation and Pb²⁺ Adsorption Properties of Modified Pectin-based Magnetic Microspheres with Different Sizes. Materials Reports, 2023, 37(9): 21050165-8.

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http://www.mater-rep.com/CN/10.11896/cldb.21050165 或 http://www.mater-rep.com/CN/Y2023/V37/I9/21050165

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